# vim: tabstop=4 shiftwidth=4 softtabstop=4

#    Copyright (c) 2010 Citrix Systems, Inc.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

"""Test suite for XenAPI."""

import ast
import base64
import contextlib
import copy
import functools
import mox
import os
import re

import mox
from oslo.config import cfg

from nova.compute import api as compute_api
from nova.compute import flavors
from nova.compute import power_state
from nova.compute import task_states
from nova.compute import vm_states
from nova import context
from nova import crypto
from nova import db
from nova import exception
from nova.openstack.common.gettextutils import _
from nova.openstack.common import importutils
from nova.openstack.common import jsonutils
from nova.openstack.common import log as logging
from nova import test
from nova.tests.db import fakes as db_fakes
from nova.tests import fake_instance
from nova.tests import fake_network
from nova.tests import fake_processutils
import nova.tests.image.fake as fake_image
from nova.tests import matchers
from nova.tests.virt.xenapi import stubs
from nova.virt import fake
from nova.virt.xenapi import agent
from nova.virt.xenapi import driver as xenapi_conn
from nova.virt.xenapi import fake as xenapi_fake
from nova.virt.xenapi import host
from nova.virt.xenapi.image import glance
from nova.virt.xenapi import pool
from nova.virt.xenapi import pool_states
from nova.virt.xenapi import vm_utils
from nova.virt.xenapi import vmops
from nova.virt.xenapi import volume_utils

LOG = logging.getLogger(__name__)

CONF = cfg.CONF
CONF.import_opt('compute_manager', 'nova.service')
CONF.import_opt('network_manager', 'nova.service')
CONF.import_opt('compute_driver', 'nova.virt.driver')
CONF.import_opt('host', 'nova.netconf')
CONF.import_opt('default_availability_zone', 'nova.availability_zones')

IMAGE_MACHINE = '1'
IMAGE_KERNEL = '2'
IMAGE_RAMDISK = '3'
IMAGE_RAW = '4'
IMAGE_VHD = '5'
IMAGE_ISO = '6'
IMAGE_IPXE_ISO = '7'

IMAGE_FIXTURES = {
    IMAGE_MACHINE: {
        'image_meta': {'name': 'fakemachine', 'size': 0,
                       'disk_format': 'ami',
                       'container_format': 'ami'},
    },
    IMAGE_KERNEL: {
        'image_meta': {'name': 'fakekernel', 'size': 0,
                       'disk_format': 'aki',
                       'container_format': 'aki'},
    },
    IMAGE_RAMDISK: {
        'image_meta': {'name': 'fakeramdisk', 'size': 0,
                       'disk_format': 'ari',
                       'container_format': 'ari'},
    },
    IMAGE_RAW: {
        'image_meta': {'name': 'fakeraw', 'size': 0,
                       'disk_format': 'raw',
                       'container_format': 'bare'},
    },
    IMAGE_VHD: {
        'image_meta': {'name': 'fakevhd', 'size': 0,
                       'disk_format': 'vhd',
                       'container_format': 'ovf'},
    },
    IMAGE_ISO: {
        'image_meta': {'name': 'fakeiso', 'size': 0,
                       'disk_format': 'iso',
                       'container_format': 'bare'},
    },
    IMAGE_IPXE_ISO: {
        'image_meta': {'name': 'fake_ipxe_iso', 'size': 0,
                       'disk_format': 'iso',
                       'container_format': 'bare',
                       'properties': {'ipxe_boot': 'true'}},
    },
}


def set_image_fixtures():
    image_service = fake_image.FakeImageService()
    image_service.images.clear()
    for image_id, image_meta in IMAGE_FIXTURES.items():
        image_meta = image_meta['image_meta']
        image_meta['id'] = image_id
        image_service.create(None, image_meta)


def get_fake_device_info():
    # FIXME: 'sr_uuid', 'introduce_sr_keys', sr_type and vdi_uuid
    # can be removed from the dict when LP bug #1087308 is fixed
    fake_vdi_ref = xenapi_fake.create_vdi('fake-vdi', None)
    fake_vdi_uuid = xenapi_fake.get_record('VDI', fake_vdi_ref)['uuid']
    fake = {'block_device_mapping':
              [{'connection_info': {'driver_volume_type': 'iscsi',
                                    'data': {'sr_uuid': 'falseSR',
                                             'introduce_sr_keys': ['sr_type'],
                                             'sr_type': 'iscsi',
                                             'vdi_uuid': fake_vdi_uuid,
                                             'target_discovered': False,
                                             'target_iqn': 'foo_iqn:foo_volid',
                                             'target_portal': 'localhost:3260',
                                             'volume_id': 'foo_volid',
                                             'target_lun': 1,
                                             'auth_password': 'my-p@55w0rd',
                                             'auth_username': 'johndoe',
                                             'auth_method': u'CHAP'}, },
                'mount_device': 'vda',
                'delete_on_termination': False}, ],
            'root_device_name': '/dev/sda',
            'ephemerals': [],
            'swap': None, }
    return fake


def stub_vm_utils_with_vdi_attached_here(function):
    """
    vm_utils.with_vdi_attached_here needs to be stubbed out because it
    calls down to the filesystem to attach a vdi. This provides a
    decorator to handle that.
    """
    @functools.wraps(function)
    def decorated_function(self, *args, **kwargs):
        @contextlib.contextmanager
        def fake_vdi_attached_here(*args, **kwargs):
            fake_dev = 'fakedev'
            yield fake_dev

        def fake_image_download(*args, **kwargs):
            pass

        orig_vdi_attached_here = vm_utils.vdi_attached_here
        orig_image_download = fake_image._FakeImageService.download
        try:
            vm_utils.vdi_attached_here = fake_vdi_attached_here
            fake_image._FakeImageService.download = fake_image_download
            return function(self, *args, **kwargs)
        finally:
            fake_image._FakeImageService.download = orig_image_download
            vm_utils.vdi_attached_here = orig_vdi_attached_here

    return decorated_function


def create_instance_with_system_metadata(context, instance_values):
    instance_type = db.flavor_get(context,
                                         instance_values['instance_type_id'])
    sys_meta = flavors.save_flavor_info({},
                                                      instance_type)
    instance_values['system_metadata'] = sys_meta
    return db.instance_create(context, instance_values)


class XenAPIVolumeTestCase(stubs.XenAPITestBase):
    """Unit tests for Volume operations."""
    def setUp(self):
        super(XenAPIVolumeTestCase, self).setUp()
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id, self.project_id)
        self.flags(disable_process_locking=True,
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver',
                   xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass')
        db_fakes.stub_out_db_instance_api(self.stubs)
        self.instance_values = {'id': 1,
                  'project_id': self.user_id,
                  'user_id': 'fake',
                  'image_ref': 1,
                  'kernel_id': 2,
                  'ramdisk_id': 3,
                  'root_gb': 20,
                  'instance_type_id': '3',  # m1.large
                  'os_type': 'linux',
                  'architecture': 'x86-64'}

    def _create_volume(self, size=0):
        """Create a volume object."""
        vol = {}
        vol['size'] = size
        vol['user_id'] = 'fake'
        vol['project_id'] = 'fake'
        vol['host'] = 'localhost'
        vol['availability_zone'] = CONF.default_availability_zone
        vol['status'] = "creating"
        vol['attach_status'] = "detached"
        return db.volume_create(self.context, vol)

    @staticmethod
    def _make_connection_data():
        return {
            'volume_id': 1,
            'target_iqn': 'iqn.2010-10.org.openstack:volume-00000001',
            'target_portal': '127.0.0.1:3260,fake',
            'target_lun': None,
            'auth_method': 'CHAP',
            'auth_username': 'username',
            'auth_password': 'password',
        }

    @classmethod
    def _make_connection_info(cls):
        return {
            'driver_volume_type': 'iscsi',
            'data': cls._make_connection_data()
        }

    def test_mountpoint_to_number(self):
        cases = {
            'sda': 0,
            'sdp': 15,
            'hda': 0,
            'hdp': 15,
            'vda': 0,
            'xvda': 0,
            '0': 0,
            '10': 10,
            'vdq': -1,
            'sdq': -1,
            'hdq': -1,
            'xvdq': -1,
        }

        for (input, expected) in cases.iteritems():
            actual = volume_utils.mountpoint_to_number(input)
            self.assertEqual(actual, expected,
                    '%s yielded %s, not %s' % (input, actual, expected))

    def test_parse_volume_info_parsing_auth_details(self):
        result = volume_utils.parse_volume_info(
            self._make_connection_data())

        self.assertEquals('username', result['chapuser'])
        self.assertEquals('password', result['chappassword'])

    def test_get_device_number_raise_exception_on_wrong_mountpoint(self):
        self.assertRaises(
            volume_utils.StorageError,
            volume_utils.get_device_number,
            'dev/sd')

    def test_attach_volume(self):
        # This shows how to test Ops classes' methods.
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVolumeTests)
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        instance = db.instance_create(self.context, self.instance_values)
        vm = xenapi_fake.create_vm(instance['name'], 'Running')
        result = conn.attach_volume(None, self._make_connection_info(),
                                    instance, '/dev/sdc')

        # check that the VM has a VBD attached to it
        # Get XenAPI record for VBD
        vbds = xenapi_fake.get_all('VBD')
        vbd = xenapi_fake.get_record('VBD', vbds[0])
        vm_ref = vbd['VM']
        self.assertEqual(vm_ref, vm)

    def test_attach_volume_raise_exception(self):
        # This shows how to test when exceptions are raised.
        stubs.stubout_session(self.stubs,
                              stubs.FakeSessionForVolumeFailedTests)
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        instance = db.instance_create(self.context, self.instance_values)
        xenapi_fake.create_vm(instance['name'], 'Running')
        self.assertRaises(exception.VolumeDriverNotFound,
                          conn.attach_volume,
                          None, {'driver_volume_type': 'nonexist'},
                          instance, '/dev/sdc')


class XenAPIVMTestCase(stubs.XenAPITestBase):
    """Unit tests for VM operations."""
    def setUp(self):
        super(XenAPIVMTestCase, self).setUp()
        self.useFixture(test.SampleNetworks())
        self.network = importutils.import_object(CONF.network_manager)
        self.flags(disable_process_locking=True,
                   instance_name_template='%d',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver',
                   xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass',)
        db_fakes.stub_out_db_instance_api(self.stubs)
        xenapi_fake.create_network('fake', 'fake_br1')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        stubs.stubout_get_this_vm_uuid(self.stubs)
        stubs.stub_out_vm_methods(self.stubs)
        fake_processutils.stub_out_processutils_execute(self.stubs)
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id, self.project_id)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.conn._session.is_local_connection = False

        self.stubs.Set(fake.FakeVirtAPI, 'instance_update',
                       lambda *args, **kwargs: ('fake-oldref', 'fake-newref'))
        fake_image.stub_out_image_service(self.stubs)
        set_image_fixtures()
        stubs.stubout_image_service_download(self.stubs)
        stubs.stubout_stream_disk(self.stubs)

        def fake_inject_instance_metadata(self, instance, vm):
            pass
        self.stubs.Set(vmops.VMOps, '_inject_instance_metadata',
                       fake_inject_instance_metadata)

        def fake_safe_copy_vdi(session, sr_ref, instance, vdi_to_copy_ref):
            name_label = "fakenamelabel"
            disk_type = "fakedisktype"
            virtual_size = 777
            return vm_utils.create_vdi(
                    session, sr_ref, instance, name_label, disk_type,
                    virtual_size)
        self.stubs.Set(vm_utils, '_safe_copy_vdi', fake_safe_copy_vdi)

    def tearDown(self):
        fake_image.FakeImageService_reset()
        super(XenAPIVMTestCase, self).tearDown()

    def test_init_host(self):
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        vm = vm_utils._get_this_vm_ref(session)
        # Local root disk
        vdi0 = xenapi_fake.create_vdi('compute', None)
        vbd0 = xenapi_fake.create_vbd(vm, vdi0)
        # Instance VDI
        vdi1 = xenapi_fake.create_vdi('instance-aaaa', None,
                other_config={'nova_instance_uuid': 'aaaa'})
        vbd1 = xenapi_fake.create_vbd(vm, vdi1)
        # Only looks like instance VDI
        vdi2 = xenapi_fake.create_vdi('instance-bbbb', None)
        vbd2 = xenapi_fake.create_vbd(vm, vdi2)

        self.conn.init_host(None)
        self.assertEquals(set(xenapi_fake.get_all('VBD')), set([vbd0, vbd2]))

    def test_instance_exists(self):
        self.mox.StubOutWithMock(vm_utils, 'lookup')
        vm_utils.lookup(mox.IgnoreArg(), 'foo').AndReturn(True)
        self.mox.ReplayAll()

        self.assertTrue(self.conn.instance_exists('foo'))

    def test_instance_not_exists(self):
        self.mox.StubOutWithMock(vm_utils, 'lookup')
        vm_utils.lookup(mox.IgnoreArg(), 'bar').AndReturn(None)
        self.mox.ReplayAll()

        self.assertFalse(self.conn.instance_exists('bar'))

    def test_list_instances_0(self):
        instances = self.conn.list_instances()
        self.assertEquals(instances, [])

    def test_list_instance_uuids_0(self):
        instance_uuids = self.conn.list_instance_uuids()
        self.assertEquals(instance_uuids, [])

    def test_list_instance_uuids(self):
        uuids = []
        for x in xrange(1, 4):
            instance = self._create_instance(x)
            uuids.append(instance['uuid'])
        instance_uuids = self.conn.list_instance_uuids()
        self.assertEqual(len(uuids), len(instance_uuids))
        self.assertEqual(set(uuids), set(instance_uuids))

    def test_get_rrd_server(self):
        self.flags(xenapi_connection_url='myscheme://myaddress/')
        server_info = vm_utils._get_rrd_server()
        self.assertEqual(server_info[0], 'myscheme')
        self.assertEqual(server_info[1], 'myaddress')

    def test_get_diagnostics(self):
        def fake_get_rrd(host, vm_uuid):
            path = os.path.dirname(os.path.realpath(__file__))
            with open(os.path.join(path, 'vm_rrd.xml')) as f:
                return re.sub(r'\s', '', f.read())
        self.stubs.Set(vm_utils, '_get_rrd', fake_get_rrd)

        fake_diagnostics = {
            'vbd_xvdb_write': '0.0',
            'memory_target': '4294967296.0000',
            'memory_internal_free': '1415564.0000',
            'memory': '4294967296.0000',
            'vbd_xvda_write': '0.0',
            'cpu0': '0.0042',
            'vif_0_tx': '287.4134',
            'vbd_xvda_read': '0.0',
            'vif_0_rx': '1816.0144',
            'vif_2_rx': '0.0',
            'vif_2_tx': '0.0',
            'vbd_xvdb_read': '0.0',
            'last_update': '1328795567',
        }
        instance = self._create_instance()
        expected = self.conn.get_diagnostics(instance)
        self.assertThat(fake_diagnostics, matchers.DictMatches(expected))

    def test_get_vnc_console(self):
        instance = self._create_instance()
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                fake.FakeVirtAPI())
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        vm_ref = vm_utils.lookup(session, instance['name'])

        console = conn.get_vnc_console(instance)

        # Note(sulo): We dont care about session id in test
        # they will always differ so strip that out
        actual_path = console['internal_access_path'].split('&')[0]
        expected_path = "/console?ref=%s" % str(vm_ref)

        self.assertEqual(expected_path, actual_path)

    def test_get_vnc_console_for_rescue(self):
        instance = self._create_instance()
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        rescue_vm = xenapi_fake.create_vm(instance['name'] + '-rescue',
                                          'Running')
        # Set instance state to rescued
        instance['vm_state'] = 'rescued'

        console = conn.get_vnc_console(instance)

        # Note(sulo): We dont care about session id in test
        # they will always differ so strip that out
        actual_path = console['internal_access_path'].split('&')[0]
        expected_path = "/console?ref=%s" % str(rescue_vm)

        self.assertEqual(expected_path, actual_path)

    def test_get_vnc_console_instance_not_ready(self):
        instance = {}
        # set instance name and state
        instance['name'] = 'fake-instance'
        instance['uuid'] = '00000000-0000-0000-0000-000000000000'
        instance['vm_state'] = 'building'

        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.assertRaises(exception.InstanceNotFound,
                          conn.get_vnc_console, instance)

    def test_get_vnc_console_rescue_not_ready(self):
        instance = {}
        instance['name'] = 'fake-rescue'
        instance['uuid'] = '00000000-0000-0000-0000-000000000001'
        instance['vm_state'] = 'rescued'

        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.assertRaises(exception.InstanceNotReady,
                          conn.get_vnc_console, instance)

    def test_instance_snapshot_fails_with_no_primary_vdi(self):

        def create_bad_vbd(session, vm_ref, vdi_ref, userdevice,
                           vbd_type='disk', read_only=False, bootable=False,
                           osvol=False):
            vbd_rec = {'VM': vm_ref,
               'VDI': vdi_ref,
               'userdevice': 'fake',
               'currently_attached': False}
            vbd_ref = xenapi_fake._create_object('VBD', vbd_rec)
            xenapi_fake.after_VBD_create(vbd_ref, vbd_rec)
            return vbd_ref

        self.stubs.Set(vm_utils, 'create_vbd', create_bad_vbd)
        stubs.stubout_instance_snapshot(self.stubs)
        # Stubbing out firewall driver as previous stub sets alters
        # xml rpc result parsing
        stubs.stubout_firewall_driver(self.stubs, self.conn)
        instance = self._create_instance()

        image_id = "my_snapshot_id"
        self.assertRaises(exception.NovaException, self.conn.snapshot,
                          self.context, instance, image_id,
                          lambda *args, **kwargs: None)

    def test_instance_snapshot(self):
        expected_calls = [
            {'args': (),
             'kwargs':
                 {'task_state': task_states.IMAGE_PENDING_UPLOAD}},
            {'args': (),
             'kwargs':
                 {'task_state': task_states.IMAGE_UPLOADING,
                  'expected_state': task_states.IMAGE_PENDING_UPLOAD}}]
        func_call_matcher = matchers.FunctionCallMatcher(expected_calls)
        image_id = "my_snapshot_id"

        stubs.stubout_instance_snapshot(self.stubs)
        stubs.stubout_is_snapshot(self.stubs)
        # Stubbing out firewall driver as previous stub sets alters
        # xml rpc result parsing
        stubs.stubout_firewall_driver(self.stubs, self.conn)

        instance = self._create_instance()

        self.fake_upload_called = False

        def fake_image_upload(_self, ctx, session, inst, vdi_uuids,
                              img_id):
            self.fake_upload_called = True
            self.assertEqual(ctx, self.context)
            self.assertEqual(inst, instance)
            self.assertTrue(isinstance(vdi_uuids, list))
            self.assertEqual(img_id, image_id)

        self.stubs.Set(glance.GlanceStore, 'upload_image',
                       fake_image_upload)

        self.conn.snapshot(self.context, instance, image_id,
                           func_call_matcher.call)

        # Ensure VM was torn down
        vm_labels = []
        for vm_ref in xenapi_fake.get_all('VM'):
            vm_rec = xenapi_fake.get_record('VM', vm_ref)
            if not vm_rec["is_control_domain"]:
                vm_labels.append(vm_rec["name_label"])

        self.assertEquals(vm_labels, [instance['name']])

        # Ensure VBDs were torn down
        vbd_labels = []
        for vbd_ref in xenapi_fake.get_all('VBD'):
            vbd_rec = xenapi_fake.get_record('VBD', vbd_ref)
            vbd_labels.append(vbd_rec["vm_name_label"])

        self.assertEquals(vbd_labels, [instance['name']])

        # Ensure task states changed in correct order
        self.assertIsNone(func_call_matcher.match())

        # Ensure VDIs were torn down
        for vdi_ref in xenapi_fake.get_all('VDI'):
            vdi_rec = xenapi_fake.get_record('VDI', vdi_ref)
            name_label = vdi_rec["name_label"]
            self.assert_(not name_label.endswith('snapshot'))

        self.assertTrue(self.fake_upload_called)

    def create_vm_record(self, conn, os_type, name):
        instances = conn.list_instances()
        self.assertEquals(instances, [name])

        # Get Nova record for VM
        vm_info = conn.get_info({'name': name})
        # Get XenAPI record for VM
        vms = [rec for ref, rec
               in xenapi_fake.get_all_records('VM').iteritems()
               if not rec['is_control_domain']]
        vm = vms[0]
        self.vm_info = vm_info
        self.vm = vm

    def check_vm_record(self, conn, instance_type_id, check_injection):
        instance_type = db.flavor_get(conn, instance_type_id)
        mem_kib = long(instance_type['memory_mb']) << 10
        mem_bytes = str(mem_kib << 10)
        vcpus = instance_type['vcpus']
        vcpu_weight = instance_type['vcpu_weight']

        self.assertEquals(self.vm_info['max_mem'], mem_kib)
        self.assertEquals(self.vm_info['mem'], mem_kib)
        self.assertEquals(self.vm['memory_static_max'], mem_bytes)
        self.assertEquals(self.vm['memory_dynamic_max'], mem_bytes)
        self.assertEquals(self.vm['memory_dynamic_min'], mem_bytes)
        self.assertEquals(self.vm['VCPUs_max'], str(vcpus))
        self.assertEquals(self.vm['VCPUs_at_startup'], str(vcpus))
        if vcpu_weight == None:
            self.assertEquals(self.vm['VCPUs_params'], {})
        else:
            self.assertEquals(self.vm['VCPUs_params'],
                              {'weight': str(vcpu_weight), 'cap': '0'})

        # Check that the VM is running according to Nova
        self.assertEquals(self.vm_info['state'], power_state.RUNNING)

        # Check that the VM is running according to XenAPI.
        self.assertEquals(self.vm['power_state'], 'Running')

        if check_injection:
            xenstore_data = self.vm['xenstore_data']
            self.assertFalse('vm-data/hostname' in xenstore_data)
            key = 'vm-data/networking/DEADBEEF0001'
            xenstore_value = xenstore_data[key]
            tcpip_data = ast.literal_eval(xenstore_value)
            self.assertEquals(tcpip_data,
                              {'broadcast': '192.168.1.255',
                               'dns': ['192.168.1.4', '192.168.1.3'],
                               'gateway': '192.168.1.1',
                               'gateway_v6': '2001:db8:0:1::1',
                               'ip6s': [{'enabled': '1',
                                         'ip': '2001:db8:0:1::1',
                                         'netmask': 64,
                                         'gateway': '2001:db8:0:1::1'}],
                               'ips': [{'enabled': '1',
                                        'ip': '192.168.1.100',
                                        'netmask': '255.255.255.0',
                                        'gateway': '192.168.1.1'},
                                       {'enabled': '1',
                                        'ip': '192.168.1.101',
                                        'netmask': '255.255.255.0',
                                        'gateway': '192.168.1.1'}],
                               'label': 'test1',
                               'mac': 'DE:AD:BE:EF:00:01'})

    def check_vm_params_for_windows(self):
        self.assertEquals(self.vm['platform']['nx'], 'true')
        self.assertEquals(self.vm['HVM_boot_params'], {'order': 'dc'})
        self.assertEquals(self.vm['HVM_boot_policy'], 'BIOS order')

        # check that these are not set
        self.assertEquals(self.vm['PV_args'], '')
        self.assertEquals(self.vm['PV_bootloader'], '')
        self.assertEquals(self.vm['PV_kernel'], '')
        self.assertEquals(self.vm['PV_ramdisk'], '')

    def check_vm_params_for_linux(self):
        self.assertEquals(self.vm['platform']['nx'], 'false')
        self.assertEquals(self.vm['PV_args'], '')
        self.assertEquals(self.vm['PV_bootloader'], 'pygrub')

        # check that these are not set
        self.assertEquals(self.vm['PV_kernel'], '')
        self.assertEquals(self.vm['PV_ramdisk'], '')
        self.assertEquals(self.vm['HVM_boot_params'], {})
        self.assertEquals(self.vm['HVM_boot_policy'], '')

    def check_vm_params_for_linux_with_external_kernel(self):
        self.assertEquals(self.vm['platform']['nx'], 'false')
        self.assertEquals(self.vm['PV_args'], 'root=/dev/xvda1')
        self.assertNotEquals(self.vm['PV_kernel'], '')
        self.assertNotEquals(self.vm['PV_ramdisk'], '')

        # check that these are not set
        self.assertEquals(self.vm['HVM_boot_params'], {})
        self.assertEquals(self.vm['HVM_boot_policy'], '')

    def _list_vdis(self):
        url = CONF.xenapi_connection_url
        username = CONF.xenapi_connection_username
        password = CONF.xenapi_connection_password
        session = xenapi_conn.XenAPISession(url, username, password,
                                            fake.FakeVirtAPI())
        return session.call_xenapi('VDI.get_all')

    def _list_vms(self):
        url = CONF.xenapi_connection_url
        username = CONF.xenapi_connection_username
        password = CONF.xenapi_connection_password
        session = xenapi_conn.XenAPISession(url, username, password,
                                            fake.FakeVirtAPI())
        return session.call_xenapi('VM.get_all')

    def _check_vdis(self, start_list, end_list):
        for vdi_ref in end_list:
            if vdi_ref not in start_list:
                vdi_rec = xenapi_fake.get_record('VDI', vdi_ref)
                # If the cache is turned on then the base disk will be
                # there even after the cleanup
                if 'other_config' in vdi_rec:
                    if 'image-id' not in vdi_rec['other_config']:
                        self.fail('Found unexpected VDI:%s' % vdi_ref)
                else:
                    self.fail('Found unexpected VDI:%s' % vdi_ref)

    def _test_spawn(self, image_ref, kernel_id, ramdisk_id,
                    instance_type_id="3", os_type="linux",
                    hostname="test", architecture="x86-64", instance_id=1,
                    injected_files=None, check_injection=False,
                    create_record=True, empty_dns=False,
                    block_device_info=None,
                    key_data=None):
        if injected_files is None:
            injected_files = []

        # Fake out inject_instance_metadata
        def fake_inject_instance_metadata(self, instance, vm):
            pass
        self.stubs.Set(vmops.VMOps, '_inject_instance_metadata',
                       fake_inject_instance_metadata)

        if create_record:
            instance_values = {'id': instance_id,
                               'project_id': self.project_id,
                               'user_id': self.user_id,
                               'image_ref': image_ref,
                               'kernel_id': kernel_id,
                               'ramdisk_id': ramdisk_id,
                               'root_gb': 20,
                               'instance_type_id': instance_type_id,
                               'os_type': os_type,
                               'hostname': hostname,
                               'key_data': key_data,
                               'architecture': architecture}
            instance = create_instance_with_system_metadata(self.context,
                                                            instance_values)
        else:
            instance = db.instance_get(self.context, instance_id)

        network_info = fake_network.fake_get_instance_nw_info(self.stubs)
        if empty_dns:
            # NOTE(tr3buchet): this is a terrible way to do this...
            network_info[0]['network']['subnets'][0]['dns'] = []

        image_meta = {}
        if image_ref:
            image_meta = IMAGE_FIXTURES[image_ref]["image_meta"]
        self.conn.spawn(self.context, instance, image_meta, injected_files,
                        'herp', network_info, block_device_info)
        self.create_vm_record(self.conn, os_type, instance['name'])
        self.check_vm_record(self.conn, instance_type_id, check_injection)
        self.assertTrue(instance['os_type'])
        self.assertTrue(instance['architecture'])

    def test_spawn_ipxe_iso_success(self):
        self.mox.StubOutWithMock(vm_utils, 'get_sr_path')
        vm_utils.get_sr_path(mox.IgnoreArg()).AndReturn('/sr/path')

        self.flags(xenapi_ipxe_network_name='test1',
                   xenapi_ipxe_boot_menu_url='http://boot.example.com',
                   xenapi_ipxe_mkisofs_cmd='/root/mkisofs')
        self.mox.StubOutWithMock(self.conn._session, 'call_plugin_serialized')
        self.conn._session.call_plugin_serialized(
            'ipxe', 'inject', '/sr/path', mox.IgnoreArg(),
            'http://boot.example.com', '192.168.1.100', '255.255.255.0',
            '192.168.1.1', '192.168.1.3', '/root/mkisofs')

        self.mox.ReplayAll()
        self._test_spawn(IMAGE_IPXE_ISO, None, None)

    def test_spawn_ipxe_iso_no_network_name(self):
        self.flags(xenapi_ipxe_network_name=None,
                   xenapi_ipxe_boot_menu_url='http://boot.example.com')

        # call_plugin_serialized shouldn't be called
        self.mox.StubOutWithMock(self.conn._session, 'call_plugin_serialized')

        self.mox.ReplayAll()
        self._test_spawn(IMAGE_IPXE_ISO, None, None)

    def test_spawn_ipxe_iso_no_boot_menu_url(self):
        self.flags(xenapi_ipxe_network_name='test1',
                   xenapi_ipxe_boot_menu_url=None)

        # call_plugin_serialized shouldn't be called
        self.mox.StubOutWithMock(self.conn._session, 'call_plugin_serialized')

        self.mox.ReplayAll()
        self._test_spawn(IMAGE_IPXE_ISO, None, None)

    def test_spawn_ipxe_iso_unknown_network_name(self):
        self.flags(xenapi_ipxe_network_name='test2',
                   xenapi_ipxe_boot_menu_url='http://boot.example.com')

        # call_plugin_serialized shouldn't be called
        self.mox.StubOutWithMock(self.conn._session, 'call_plugin_serialized')

        self.mox.ReplayAll()
        self._test_spawn(IMAGE_IPXE_ISO, None, None)

    def test_spawn_empty_dns(self):
        # Test spawning with an empty dns list.
        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="linux", architecture="x86-64",
                         empty_dns=True)
        self.check_vm_params_for_linux()

    def test_spawn_not_enough_memory(self):
        self.assertRaises(exception.InsufficientFreeMemory,
                          self._test_spawn,
                          '1', 2, 3, "4")  # m1.xlarge

    def test_spawn_fail_cleanup_1(self):
        """Simulates an error while downloading an image.

        Verifies that the VM and VDIs created are properly cleaned up.
        """
        vdi_recs_start = self._list_vdis()
        start_vms = self._list_vms()
        stubs.stubout_fetch_disk_image(self.stubs, raise_failure=True)
        self.assertRaises(xenapi_fake.Failure,
                          self._test_spawn, '1', 2, 3)
        # No additional VDI should be found.
        vdi_recs_end = self._list_vdis()
        end_vms = self._list_vms()
        self._check_vdis(vdi_recs_start, vdi_recs_end)
        # No additional VMs should be found.
        self.assertEqual(start_vms, end_vms)

    def test_spawn_fail_cleanup_2(self):
        """Simulates an error while creating VM record.

        Verifies that the VM and VDIs created are properly cleaned up.
        """
        vdi_recs_start = self._list_vdis()
        start_vms = self._list_vms()
        stubs.stubout_create_vm(self.stubs)
        self.assertRaises(xenapi_fake.Failure,
                          self._test_spawn, '1', 2, 3)
        # No additional VDI should be found.
        vdi_recs_end = self._list_vdis()
        end_vms = self._list_vms()
        self._check_vdis(vdi_recs_start, vdi_recs_end)
        # No additional VMs should be found.
        self.assertEqual(start_vms, end_vms)

    def test_spawn_fail_cleanup_3(self):
        """Simulates an error while attaching disks.

        Verifies that the VM and VDIs created are properly cleaned up.
        """
        stubs.stubout_attach_disks(self.stubs)
        vdi_recs_start = self._list_vdis()
        start_vms = self._list_vms()
        self.assertRaises(xenapi_fake.Failure,
                          self._test_spawn, '1', 2, 3)
        # No additional VDI should be found.
        vdi_recs_end = self._list_vdis()
        end_vms = self._list_vms()
        self._check_vdis(vdi_recs_start, vdi_recs_end)
        # No additional VMs should be found.
        self.assertEqual(start_vms, end_vms)

    def test_spawn_raw_glance(self):
        self._test_spawn(IMAGE_RAW, None, None)
        self.check_vm_params_for_windows()

    def test_spawn_vhd_glance_linux(self):
        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="linux", architecture="x86-64")
        self.check_vm_params_for_linux()

    def test_spawn_vhd_glance_windows(self):
        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="windows", architecture="i386",
                         instance_type_id=5)
        self.check_vm_params_for_windows()

    def test_spawn_iso_glance(self):
        self._test_spawn(IMAGE_ISO, None, None,
                         os_type="windows", architecture="i386")
        self.check_vm_params_for_windows()

    def test_spawn_glance(self):

        def fake_fetch_disk_image(context, session, instance, name_label,
                                  image_id, image_type):
            sr_ref = vm_utils.safe_find_sr(session)
            image_type_str = vm_utils.ImageType.to_string(image_type)
            vdi_ref = vm_utils.create_vdi(session, sr_ref, instance,
                name_label, image_type_str, "20")
            vdi_role = vm_utils.ImageType.get_role(image_type)
            vdi_uuid = session.call_xenapi("VDI.get_uuid", vdi_ref)
            return {vdi_role: dict(uuid=vdi_uuid, file=None)}
        self.stubs.Set(vm_utils, '_fetch_disk_image',
                       fake_fetch_disk_image)

        self._test_spawn(IMAGE_MACHINE,
                         IMAGE_KERNEL,
                         IMAGE_RAMDISK)
        self.check_vm_params_for_linux_with_external_kernel()

    def test_spawn_boot_from_volume_no_image_meta(self):
        dev_info = get_fake_device_info()
        self._test_spawn(None, None, None,
                         block_device_info=dev_info)

    def test_spawn_boot_from_volume_with_image_meta(self):
        dev_info = get_fake_device_info()
        self._test_spawn(None, None, None,
                         block_device_info=dev_info)

    def test_spawn_netinject_file(self):
        self.flags(flat_injected=True)
        db_fakes.stub_out_db_instance_api(self.stubs, injected=True)

        self._tee_executed = False

        def _tee_handler(cmd, **kwargs):
            input = kwargs.get('process_input', None)
            self.assertNotEqual(input, None)
            config = [line.strip() for line in input.split("\n")]
            # Find the start of eth0 configuration and check it
            index = config.index('auto eth0')
            self.assertEquals(config[index + 1:index + 8], [
                'iface eth0 inet static',
                'address 192.168.1.100',
                'netmask 255.255.255.0',
                'broadcast 192.168.1.255',
                'gateway 192.168.1.1',
                'dns-nameservers 192.168.1.3 192.168.1.4',
                ''])
            self._tee_executed = True
            return '', ''

        def _readlink_handler(cmd_parts, **kwargs):
            return os.path.realpath(cmd_parts[2]), ''

        fake_processutils.fake_execute_set_repliers([
            # Capture the tee .../etc/network/interfaces command
            (r'tee.*interfaces', _tee_handler),
            (r'readlink -nm.*', _readlink_handler),
        ])
        self._test_spawn(IMAGE_MACHINE,
                         IMAGE_KERNEL,
                         IMAGE_RAMDISK,
                         check_injection=True)
        self.assertTrue(self._tee_executed)

    def test_spawn_netinject_xenstore(self):
        db_fakes.stub_out_db_instance_api(self.stubs, injected=True)

        self._tee_executed = False

        def _mount_handler(cmd, *ignore_args, **ignore_kwargs):
            # When mounting, create real files under the mountpoint to simulate
            # files in the mounted filesystem

            # mount point will be the last item of the command list
            self._tmpdir = cmd[len(cmd) - 1]
            LOG.debug(_('Creating files in %s to simulate guest agent'),
                      self._tmpdir)
            os.makedirs(os.path.join(self._tmpdir, 'usr', 'sbin'))
            # Touch the file using open
            open(os.path.join(self._tmpdir, 'usr', 'sbin',
                'xe-update-networking'), 'w').close()
            return '', ''

        def _umount_handler(cmd, *ignore_args, **ignore_kwargs):
            # Umount would normall make files in the m,ounted filesystem
            # disappear, so do that here
            LOG.debug(_('Removing simulated guest agent files in %s'),
                      self._tmpdir)
            os.remove(os.path.join(self._tmpdir, 'usr', 'sbin',
                'xe-update-networking'))
            os.rmdir(os.path.join(self._tmpdir, 'usr', 'sbin'))
            os.rmdir(os.path.join(self._tmpdir, 'usr'))
            return '', ''

        def _tee_handler(cmd, *ignore_args, **ignore_kwargs):
            self._tee_executed = True
            return '', ''

        fake_processutils.fake_execute_set_repliers([
            (r'mount', _mount_handler),
            (r'umount', _umount_handler),
            (r'tee.*interfaces', _tee_handler)])
        self._test_spawn('1', 2, 3, check_injection=True)

        # tee must not run in this case, where an injection-capable
        # guest agent is detected
        self.assertFalse(self._tee_executed)

    def test_spawn_injects_auto_disk_config_to_xenstore(self):
        instance = self._create_instance(spawn=False)
        self.mox.StubOutWithMock(self.conn._vmops, '_inject_auto_disk_config')
        self.conn._vmops._inject_auto_disk_config(instance, mox.IgnoreArg())
        self.mox.ReplayAll()
        self.conn.spawn(self.context, instance,
                        IMAGE_FIXTURES['1']["image_meta"], [], 'herp', '')

    def test_spawn_vlanmanager(self):
        self.flags(network_manager='nova.network.manager.VlanManager',
                   vlan_interface='fake0')

        def dummy(*args, **kwargs):
            pass

        self.stubs.Set(vmops.VMOps, '_create_vifs', dummy)
        # Reset network table
        xenapi_fake.reset_table('network')
        # Instance id = 2 will use vlan network (see db/fakes.py)
        ctxt = self.context.elevated()
        instance = self._create_instance(2, False)
        networks = self.network.db.network_get_all(ctxt)
        for network in networks:
            self.network.set_network_host(ctxt, network)

        self.network.allocate_for_instance(ctxt,
                          instance_id=2,
                          instance_uuid='00000000-0000-0000-0000-000000000002',
                          host=CONF.host,
                          vpn=None,
                          rxtx_factor=3,
                          project_id=self.project_id,
                          macs=None)
        self._test_spawn(IMAGE_MACHINE,
                         IMAGE_KERNEL,
                         IMAGE_RAMDISK,
                         instance_id=2,
                         create_record=False)
        # TODO(salvatore-orlando): a complete test here would require
        # a check for making sure the bridge for the VM's VIF is
        # consistent with bridge specified in nova db

    def test_spawn_with_network_qos(self):
        self._create_instance()
        for vif_ref in xenapi_fake.get_all('VIF'):
            vif_rec = xenapi_fake.get_record('VIF', vif_ref)
            self.assertEquals(vif_rec['qos_algorithm_type'], 'ratelimit')
            self.assertEquals(vif_rec['qos_algorithm_params']['kbps'],
                              str(3 * 10 * 1024))

    def test_spawn_ssh_key_injection(self):
        # Test spawning with key_data on an instance.  Should use
        # agent file injection.
        self.flags(xenapi_use_agent_default=True)
        actual_injected_files = []

        def fake_inject_file(self, method, args):
            path = base64.b64decode(args['b64_path'])
            contents = base64.b64decode(args['b64_contents'])
            actual_injected_files.append((path, contents))
            return jsonutils.dumps({'returncode': '0', 'message': 'success'})

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       '_plugin_agent_inject_file', fake_inject_file)

        def fake_encrypt_text(sshkey, new_pass):
            self.assertEqual("ssh-rsa fake_keydata", sshkey)
            return "fake"

        self.stubs.Set(crypto, 'ssh_encrypt_text', fake_encrypt_text)

        expected_data = ('\n# The following ssh key was injected by '
                         'Nova\nssh-rsa fake_keydata\n')

        injected_files = [('/root/.ssh/authorized_keys', expected_data)]
        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="linux", architecture="x86-64",
                         key_data='ssh-rsa fake_keydata')
        self.assertEquals(actual_injected_files, injected_files)

    def test_spawn_ssh_key_injection_non_rsa(self):
        # Test spawning with key_data on an instance.  Should use
        # agent file injection.
        self.flags(xenapi_use_agent_default=True)
        actual_injected_files = []

        def fake_inject_file(self, method, args):
            path = base64.b64decode(args['b64_path'])
            contents = base64.b64decode(args['b64_contents'])
            actual_injected_files.append((path, contents))
            return jsonutils.dumps({'returncode': '0', 'message': 'success'})

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       '_plugin_agent_inject_file', fake_inject_file)

        def fake_encrypt_text(sshkey, new_pass):
            raise NotImplementedError("Should not be called")

        self.stubs.Set(crypto, 'ssh_encrypt_text', fake_encrypt_text)

        expected_data = ('\n# The following ssh key was injected by '
                         'Nova\nssh-dsa fake_keydata\n')

        injected_files = [('/root/.ssh/authorized_keys', expected_data)]
        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="linux", architecture="x86-64",
                         key_data='ssh-dsa fake_keydata')
        self.assertEquals(actual_injected_files, injected_files)

    def test_spawn_injected_files(self):
        # Test spawning with injected_files.
        self.flags(xenapi_use_agent_default=True)
        actual_injected_files = []

        def fake_inject_file(self, method, args):
            path = base64.b64decode(args['b64_path'])
            contents = base64.b64decode(args['b64_contents'])
            actual_injected_files.append((path, contents))
            return jsonutils.dumps({'returncode': '0', 'message': 'success'})
        self.stubs.Set(stubs.FakeSessionForVMTests,
                       '_plugin_agent_inject_file', fake_inject_file)

        injected_files = [('/tmp/foo', 'foobar')]
        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="linux", architecture="x86-64",
                         injected_files=injected_files)
        self.check_vm_params_for_linux()
        self.assertEquals(actual_injected_files, injected_files)

    def test_spawn_agent_upgrade(self):
        self.flags(xenapi_use_agent_default=True)
        actual_injected_files = []

        def fake_agent_build(_self, *args):
            return {"version": "1.1.0", "architecture": "x86-64",
                    "hypervisor": "xen", "os": "windows",
                    "url": "url", "md5hash": "asdf"}

        self.stubs.Set(self.conn.virtapi, 'agent_build_get_by_triple',
                       fake_agent_build)

        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="linux", architecture="x86-64")

    def test_spawn_agent_upgrade_fails_silently(self):
        self.flags(xenapi_use_agent_default=True)
        actual_injected_files = []

        def fake_agent_build(_self, *args):
            return {"version": "1.1.0", "architecture": "x86-64",
                    "hypervisor": "xen", "os": "windows",
                    "url": "url", "md5hash": "asdf"}

        self.stubs.Set(self.conn.virtapi, 'agent_build_get_by_triple',
                       fake_agent_build)

        def fake_agent_update(self, method, args):
            raise xenapi_fake.Failure(["fake_error"])

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       '_plugin_agent_agentupdate', fake_agent_update)

        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="linux", architecture="x86-64")

    def test_spawn_with_resetnetwork_alternative_returncode(self):
        self.flags(xenapi_use_agent_default=True)

        def fake_resetnetwork(self, method, args):
            fake_resetnetwork.called = True
            #NOTE(johngarbutt): as returned by FreeBSD and Gentoo
            return jsonutils.dumps({'returncode': '500',
                                    'message': 'success'})
        self.stubs.Set(stubs.FakeSessionForVMTests,
                       '_plugin_agent_resetnetwork', fake_resetnetwork)
        fake_resetnetwork.called = False

        self._test_spawn(IMAGE_VHD, None, None,
                         os_type="linux", architecture="x86-64")
        self.assertTrue(fake_resetnetwork.called)

    def _test_spawn_fails_with(self, trigger, expected_exception):
        self.flags(xenapi_use_agent_default=True)
        self.flags(agent_version_timeout=0)
        actual_injected_files = []

        def fake_agent_version(self, method, args):
            raise xenapi_fake.Failure([trigger])

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       '_plugin_agent_version', fake_agent_version)

        self.assertRaises(expected_exception, self._test_spawn,
                IMAGE_VHD, None, None, os_type="linux", architecture="x86-64")

    def test_spawn_fails_with_agent_timeout(self):
        self._test_spawn_fails_with("TIMEOUT:fake", exception.AgentTimeout)

    def test_spawn_fails_with_agent_not_implemented(self):
        self._test_spawn_fails_with("NOT IMPLEMENTED:fake",
                                    exception.AgentNotImplemented)

    def test_spawn_fails_with_agent_error(self):
        self._test_spawn_fails_with("fake_error", exception.AgentError)

    def test_spawn_fails_with_agent_bad_return(self):
        self.flags(xenapi_use_agent_default=True)
        self.flags(agent_version_timeout=0)
        actual_injected_files = []

        def fake_agent_version(self, method, args):
            return xenapi_fake.as_json(returncode='-1', message='fake')
        self.stubs.Set(stubs.FakeSessionForVMTests,
                       '_plugin_agent_version', fake_agent_version)

        self.assertRaises(exception.AgentError, self._test_spawn,
                IMAGE_VHD, None, None, os_type="linux", architecture="x86-64")

    def test_spawn_fails_agent_not_implemented(self):
        # Test spawning with injected_files.
        self.flags(xenapi_use_agent_default=True)
        self.flags(agent_version_timeout=0)
        actual_injected_files = []

        def fake_agent_version(self, method, args):
            raise xenapi_fake.Failure(["NOT IMPLEMENTED:fake"])
        self.stubs.Set(stubs.FakeSessionForVMTests,
                       '_plugin_agent_version', fake_agent_version)

        self.assertRaises(exception.AgentNotImplemented, self._test_spawn,
                IMAGE_VHD, None, None, os_type="linux", architecture="x86-64")

    def test_rescue(self):
        instance = self._create_instance()
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        vm_ref = vm_utils.lookup(session, instance['name'])

        swap_vdi_ref = xenapi_fake.create_vdi('swap', None)
        root_vdi_ref = xenapi_fake.create_vdi('root', None)

        xenapi_fake.create_vbd(vm_ref, swap_vdi_ref, userdevice=1)
        xenapi_fake.create_vbd(vm_ref, root_vdi_ref, userdevice=0)

        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        image_meta = {'id': IMAGE_VHD,
                      'disk_format': 'vhd'}
        conn.rescue(self.context, instance, [], image_meta, '')

        vm = xenapi_fake.get_record('VM', vm_ref)
        rescue_name = "%s-rescue" % vm["name_label"]
        rescue_ref = vm_utils.lookup(session, rescue_name)
        rescue_vm = xenapi_fake.get_record('VM', rescue_ref)

        vdi_uuids = []
        for vbd_uuid in rescue_vm["VBDs"]:
            vdi_uuids.append(xenapi_fake.get_record('VBD', vbd_uuid)["VDI"])
        self.assertTrue("swap" not in vdi_uuids)

    def test_rescue_preserve_disk_on_failure(self):
        # test that the original disk is preserved if rescue setup fails
        # bug #1227898
        instance = self._create_instance()
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        image_meta = {'id': IMAGE_VHD,
                      'disk_format': 'vhd'}

        vm_ref = vm_utils.lookup(session, instance['name'])
        vdi_ref, vdi_rec = vm_utils.get_vdi_for_vm_safely(session, vm_ref)

        # raise an error in the spawn setup process and trigger the
        # undo manager logic:
        def fake_start(*args, **kwargs):
            raise test.TestingException('Start Error')

        self.stubs.Set(self.conn._vmops, '_start', fake_start)

        self.assertRaises(test.TestingException, self.conn.rescue,
                          self.context, instance, [], image_meta, '')

        # confirm original disk still exists:
        vdi_ref2, vdi_rec2 = vm_utils.get_vdi_for_vm_safely(session, vm_ref)
        self.assertEqual(vdi_ref, vdi_ref2)
        self.assertEqual(vdi_rec['uuid'], vdi_rec2['uuid'])

    def test_unrescue(self):
        instance = self._create_instance()
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        # Unrescue expects the original instance to be powered off
        conn.power_off(instance)
        rescue_vm = xenapi_fake.create_vm(instance['name'] + '-rescue',
                'Running')
        conn.unrescue(instance, None)

    def test_unrescue_not_in_rescue(self):
        instance = self._create_instance()
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        # Ensure that it will not unrescue a non-rescued instance.
        self.assertRaises(exception.InstanceNotInRescueMode, conn.unrescue,
                          instance, None)

    def test_finish_revert_migration(self):
        instance = self._create_instance()

        class VMOpsMock():

            def __init__(self):
                self.finish_revert_migration_called = False

            def finish_revert_migration(self, context, instance, block_info,
                                        power_on):
                self.finish_revert_migration_called = True

        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        conn._vmops = VMOpsMock()
        conn.finish_revert_migration(self.context, instance, None)
        self.assertTrue(conn._vmops.finish_revert_migration_called)

    def test_reboot_hard(self):
        instance = self._create_instance()
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        conn.reboot(self.context, instance, None, "HARD")

    def test_poll_rebooting_instances(self):
        self.mox.StubOutWithMock(compute_api.API, 'reboot')
        compute_api.API.reboot(mox.IgnoreArg(), mox.IgnoreArg(),
                               mox.IgnoreArg())
        self.mox.ReplayAll()
        instance = self._create_instance()
        instances = [instance]
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        conn.poll_rebooting_instances(60, instances)

    def test_reboot_soft(self):
        instance = self._create_instance()
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        conn.reboot(self.context, instance, None, "SOFT")

    def test_reboot_halted(self):
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        instance = self._create_instance(spawn=False)
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        xenapi_fake.create_vm(instance['name'], 'Halted')
        conn.reboot(self.context, instance, None, "SOFT")
        vm_ref = vm_utils.lookup(session, instance['name'])
        vm = xenapi_fake.get_record('VM', vm_ref)
        self.assertEquals(vm['power_state'], 'Running')

    def test_reboot_unknown_state(self):
        instance = self._create_instance(spawn=False)
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        xenapi_fake.create_vm(instance['name'], 'Unknown')
        self.assertRaises(xenapi_fake.Failure, conn.reboot, self.context,
                          instance, None, "SOFT")

    def test_reboot_rescued(self):
        instance = self._create_instance()
        instance['vm_state'] = vm_states.RESCUED
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        real_result = vm_utils.lookup(conn._session, instance['name'])

        self.mox.StubOutWithMock(vm_utils, 'lookup')
        vm_utils.lookup(conn._session, instance['name'],
                        True).AndReturn(real_result)
        self.mox.ReplayAll()

        conn.reboot(self.context, instance, None, "SOFT")

    def test_get_console_output_succeeds(self):

        def fake_get_console_output(instance):
            self.assertEqual("instance", instance)
            return "console_log"
        self.stubs.Set(self.conn._vmops, 'get_console_output',
                       fake_get_console_output)

        self.assertEqual(self.conn.get_console_output("instance"),
                         "console_log")

    def _test_maintenance_mode(self, find_host, find_aggregate):
        real_call_xenapi = self.conn._session.call_xenapi
        instance = self._create_instance(spawn=True)
        api_calls = {}

        # Record all the xenapi calls, and return a fake list of hosts
        # for the host.get_all call
        def fake_call_xenapi(method, *args):
            api_calls[method] = args
            if method == 'host.get_all':
                return ['foo', 'bar', 'baz']
            return real_call_xenapi(method, *args)
        self.stubs.Set(self.conn._session, 'call_xenapi', fake_call_xenapi)

        def fake_aggregate_get(context, host, key):
            if find_aggregate:
                return [{'fake': 'aggregate'}]
            else:
                return []
        self.stubs.Set(self.conn.virtapi, 'aggregate_get_by_host',
                       fake_aggregate_get)

        def fake_host_find(context, session, src, dst):
            if find_host:
                return 'bar'
            else:
                raise exception.NoValidHost("I saw this one coming...")
        self.stubs.Set(host, '_host_find', fake_host_find)

        result = self.conn.host_maintenance_mode('bar', 'on_maintenance')
        self.assertEqual(result, 'on_maintenance')

        # We expect the VM.pool_migrate call to have been called to
        # migrate our instance to the 'bar' host
        vm_ref = vm_utils.lookup(self.conn._session, instance['name'])
        host_ref = "foo"
        expected = (vm_ref, host_ref, {"live": "true"})
        self.assertEqual(api_calls.get('VM.pool_migrate'), expected)

        instance = db.instance_get_by_uuid(self.context, instance['uuid'])
        self.assertEqual(instance['vm_state'], vm_states.ACTIVE)
        self.assertEqual(instance['task_state'], task_states.MIGRATING)

    def test_maintenance_mode(self):
        self._test_maintenance_mode(True, True)

    def test_maintenance_mode_no_host(self):
        self.assertRaises(exception.NoValidHost,
                          self._test_maintenance_mode, False, True)

    def test_maintenance_mode_no_aggregate(self):
        self.assertRaises(exception.NotFound,
                          self._test_maintenance_mode, True, False)

    def test_uuid_find(self):
        self.mox.StubOutWithMock(db, 'instance_get_all_by_host')
        fake_inst = fake_instance.fake_db_instance(id=123)
        fake_inst2 = fake_instance.fake_db_instance(id=456)
        db.instance_get_all_by_host(self.context, fake_inst['host'],
                                    columns_to_join=None
                                    ).AndReturn([fake_inst, fake_inst2])
        self.mox.ReplayAll()
        expected_name = CONF.instance_name_template % fake_inst['id']
        inst_uuid = host._uuid_find(self.context, fake_inst['host'],
                                    expected_name)
        self.assertEqual(inst_uuid, fake_inst['uuid'])

    def test_session_virtapi(self):
        was = {'called': False}

        def fake_aggregate_get_by_host(self, *args, **kwargs):
            was['called'] = True
            raise test.TestingException()
        self.stubs.Set(self.conn._session._virtapi, "aggregate_get_by_host",
                       fake_aggregate_get_by_host)

        self.stubs.Set(self.conn._session, "is_slave", True)

        self.assertRaises(test.TestingException,
                self.conn._session._get_host_uuid)
        self.assertTrue(was['called'])

    def test_per_instance_usage_running(self):
        instance = self._create_instance(spawn=True)
        instance_type = flavors.get_flavor(3)

        expected = {instance['uuid']: {'memory_mb': instance_type['memory_mb'],
                                       'uuid': instance['uuid']}}
        actual = self.conn.get_per_instance_usage()
        self.assertEqual(expected, actual)

        # Paused instances still consume resources:
        self.conn.pause(instance)
        actual = self.conn.get_per_instance_usage()
        self.assertEqual(expected, actual)

    def test_per_instance_usage_suspended(self):
        # Suspended instances do not consume memory:
        instance = self._create_instance(spawn=True)
        self.conn.suspend(instance)
        actual = self.conn.get_per_instance_usage()
        self.assertEqual({}, actual)

    def test_per_instance_usage_halted(self):
        instance = self._create_instance(spawn=True)
        self.conn.power_off(instance)
        actual = self.conn.get_per_instance_usage()
        self.assertEqual({}, actual)

    def _create_instance(self, instance_id=1, spawn=True):
        """Creates and spawns a test instance."""
        instance_values = {
            'id': instance_id,
            'uuid': '00000000-0000-0000-0000-00000000000%d' % instance_id,
            'display_name': 'host-%d' % instance_id,
            'project_id': self.project_id,
            'user_id': self.user_id,
            'image_ref': 1,
            'kernel_id': 2,
            'ramdisk_id': 3,
            'root_gb': 20,
            'instance_type_id': '3',  # m1.large
            'os_type': 'linux',
            'vm_mode': 'hvm',
            'architecture': 'x86-64'}

        instance = create_instance_with_system_metadata(self.context,
                                                        instance_values)
        network_info = fake_network.fake_get_instance_nw_info(self.stubs)
        image_meta = {'id': IMAGE_VHD,
                      'disk_format': 'vhd'}
        if spawn:
            self.conn.spawn(self.context, instance, image_meta, [], 'herp',
                            network_info)
        return instance

    def test_destroy_clean_up_kernel_and_ramdisk(self):
        def fake_lookup_kernel_ramdisk(session, vm_ref):
            return "kernel", "ramdisk"

        self.stubs.Set(vm_utils, "lookup_kernel_ramdisk",
                       fake_lookup_kernel_ramdisk)

        def fake_destroy_kernel_ramdisk(session, instance, kernel, ramdisk):
            fake_destroy_kernel_ramdisk.called = True
            self.assertEqual("kernel", kernel)
            self.assertEqual("ramdisk", ramdisk)

        fake_destroy_kernel_ramdisk.called = False

        self.stubs.Set(vm_utils, "destroy_kernel_ramdisk",
                       fake_destroy_kernel_ramdisk)

        instance = self._create_instance(spawn=True)
        network_info = fake_network.fake_get_instance_nw_info(self.stubs)
        self.conn.destroy(instance, network_info)

        vm_ref = vm_utils.lookup(self.conn._session, instance['name'])
        self.assertTrue(vm_ref is None)
        self.assertTrue(fake_destroy_kernel_ramdisk.called)


class XenAPIDiffieHellmanTestCase(test.NoDBTestCase):
    """Unit tests for Diffie-Hellman code."""
    def setUp(self):
        super(XenAPIDiffieHellmanTestCase, self).setUp()
        self.alice = agent.SimpleDH()
        self.bob = agent.SimpleDH()

    def test_shared(self):
        alice_pub = self.alice.get_public()
        bob_pub = self.bob.get_public()
        alice_shared = self.alice.compute_shared(bob_pub)
        bob_shared = self.bob.compute_shared(alice_pub)
        self.assertEquals(alice_shared, bob_shared)

    def _test_encryption(self, message):
        enc = self.alice.encrypt(message)
        self.assertFalse(enc.endswith('\n'))
        dec = self.bob.decrypt(enc)
        self.assertEquals(dec, message)

    def test_encrypt_simple_message(self):
        self._test_encryption('This is a simple message.')

    def test_encrypt_message_with_newlines_at_end(self):
        self._test_encryption('This message has a newline at the end.\n')

    def test_encrypt_many_newlines_at_end(self):
        self._test_encryption('Message with lotsa newlines.\n\n\n')

    def test_encrypt_newlines_inside_message(self):
        self._test_encryption('Message\nwith\ninterior\nnewlines.')

    def test_encrypt_with_leading_newlines(self):
        self._test_encryption('\n\nMessage with leading newlines.')

    def test_encrypt_really_long_message(self):
        self._test_encryption(''.join(['abcd' for i in xrange(1024)]))


class XenAPIMigrateInstance(stubs.XenAPITestBase):
    """Unit test for verifying migration-related actions."""

    def setUp(self):
        super(XenAPIMigrateInstance, self).setUp()
        self.flags(xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        db_fakes.stub_out_db_instance_api(self.stubs)
        xenapi_fake.create_network('fake', 'fake_br1')
        self.user_id = 'fake'
        self.project_id = 'fake'
        self.context = context.RequestContext(self.user_id, self.project_id)
        self.instance_values = {'id': 1,
                  'project_id': self.project_id,
                  'user_id': self.user_id,
                  'image_ref': 1,
                  'kernel_id': None,
                  'ramdisk_id': None,
                  'root_gb': 5,
                  'instance_type_id': '3',  # m1.large
                  'os_type': 'linux',
                  'architecture': 'x86-64'}

        migration_values = {
            'source_compute': 'nova-compute',
            'dest_compute': 'nova-compute',
            'dest_host': '10.127.5.114',
            'status': 'post-migrating',
            'instance_uuid': '15f23e6a-cc6e-4d22-b651-d9bdaac316f7',
            'old_instance_type_id': 5,
            'new_instance_type_id': 1
        }
        self.migration = db.migration_create(
            context.get_admin_context(), migration_values)

        fake_processutils.stub_out_processutils_execute(self.stubs)
        stubs.stub_out_migration_methods(self.stubs)
        stubs.stubout_get_this_vm_uuid(self.stubs)

        def fake_inject_instance_metadata(self, instance, vm):
            pass
        self.stubs.Set(vmops.VMOps, '_inject_instance_metadata',
                       fake_inject_instance_metadata)

    def test_resize_xenserver_6(self):
        instance = db.instance_create(self.context, self.instance_values)
        called = {'resize': False}

        def fake_vdi_resize(*args, **kwargs):
            called['resize'] = True

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       "VDI_resize", fake_vdi_resize)
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests,
                              product_version=(6, 0, 0),
                              product_brand='XenServer')
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        vdi_ref = xenapi_fake.create_vdi('hurr', 'fake')
        vdi_uuid = xenapi_fake.get_record('VDI', vdi_ref)['uuid']
        conn._vmops._resize_up_root_vdi(instance,
                                        {'uuid': vdi_uuid, 'ref': vdi_ref})
        self.assertEqual(called['resize'], True)

    def test_resize_xcp(self):
        instance = db.instance_create(self.context, self.instance_values)
        called = {'resize': False}

        def fake_vdi_resize(*args, **kwargs):
            called['resize'] = True

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       "VDI_resize", fake_vdi_resize)
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests,
                              product_version=(1, 4, 99),
                              product_brand='XCP')
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        vdi_ref = xenapi_fake.create_vdi('hurr', 'fake')
        vdi_uuid = xenapi_fake.get_record('VDI', vdi_ref)['uuid']
        conn._vmops._resize_up_root_vdi(instance,
                                        {'uuid': vdi_uuid, 'ref': vdi_ref})
        self.assertEqual(called['resize'], True)

    def test_migrate_disk_and_power_off(self):
        instance = db.instance_create(self.context, self.instance_values)
        xenapi_fake.create_vm(instance['name'], 'Running')
        instance_type = db.flavor_get_by_name(self.context, 'm1.large')
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        conn.migrate_disk_and_power_off(self.context, instance,
                                        '127.0.0.1', instance_type, None)

    def test_migrate_disk_and_power_off_passes_exceptions(self):
        instance = db.instance_create(self.context, self.instance_values)
        xenapi_fake.create_vm(instance['name'], 'Running')
        instance_type = db.flavor_get_by_name(self.context, 'm1.large')

        def fake_raise(*args, **kwargs):
            raise exception.MigrationError(reason='test failure')
        self.stubs.Set(vmops.VMOps, "_migrate_vhd", fake_raise)

        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.assertRaises(exception.MigrationError,
                          conn.migrate_disk_and_power_off,
                          self.context, instance,
                          '127.0.0.1', instance_type, None)

    def test_migrate_disk_and_power_off_throws_on_zero_gb_resize_down(self):
        instance = db.instance_create(self.context, self.instance_values)
        instance_type = {"root_gb": 0}
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.assertRaises(exception.ResizeError,
                          conn.migrate_disk_and_power_off,
                          self.context, instance,
                          'fake_dest', instance_type, None)

    def test_migrate_disk_and_power_off_with_zero_gb_old_and_new_works(self):
        instance_type = db.flavor_get_by_name(self.context, 'm1.tiny')
        instance_type["root_gb"] = 0
        values = copy.copy(self.instance_values)
        values["root_gb"] = 0
        values["instance_type"] = instance_type['id']
        instance = db.instance_create(self.context, values)
        xenapi_fake.create_vm(instance['name'], 'Running')
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        conn.migrate_disk_and_power_off(self.context, instance,
                                        '127.0.0.1', instance_type, None)

    def _test_revert_migrate(self, power_on):
        instance = create_instance_with_system_metadata(self.context,
                                                        self.instance_values)
        self.called = False
        self.fake_vm_start_called = False
        self.fake_finish_revert_migration_called = False
        context = 'fake_context'

        def fake_vm_start(*args, **kwargs):
            self.fake_vm_start_called = True

        def fake_vdi_resize(*args, **kwargs):
            self.called = True

        def fake_finish_revert_migration(*args, **kwargs):
            self.fake_finish_revert_migration_called = True

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       "VDI_resize_online", fake_vdi_resize)
        self.stubs.Set(vmops.VMOps, '_start', fake_vm_start)
        self.stubs.Set(vmops.VMOps, 'finish_revert_migration',
                       fake_finish_revert_migration)
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests,
                              product_version=(4, 0, 0),
                              product_brand='XenServer')

        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        network_info = fake_network.fake_get_instance_nw_info(self.stubs)
        image_meta = {'id': instance['image_ref'], 'disk_format': 'vhd'}
        base = xenapi_fake.create_vdi('hurr', 'fake')
        base_uuid = xenapi_fake.get_record('VDI', base)['uuid']
        cow = xenapi_fake.create_vdi('durr', 'fake')
        cow_uuid = xenapi_fake.get_record('VDI', cow)['uuid']
        conn.finish_migration(self.context, self.migration, instance,
                              dict(base_copy=base_uuid, cow=cow_uuid),
                              network_info, image_meta, resize_instance=True,
                              block_device_info=None, power_on=power_on)
        self.assertEqual(self.called, True)
        self.assertEqual(self.fake_vm_start_called, power_on)

        conn.finish_revert_migration(context, instance, network_info)
        self.assertEqual(self.fake_finish_revert_migration_called, True)

    def test_revert_migrate_power_on(self):
        self._test_revert_migrate(True)

    def test_revert_migrate_power_off(self):
        self._test_revert_migrate(False)

    def _test_finish_migrate(self, power_on):
        instance = create_instance_with_system_metadata(self.context,
                                                        self.instance_values)
        self.called = False
        self.fake_vm_start_called = False

        def fake_vm_start(*args, **kwargs):
            self.fake_vm_start_called = True

        def fake_vdi_resize(*args, **kwargs):
            self.called = True

        self.stubs.Set(vmops.VMOps, '_start', fake_vm_start)
        self.stubs.Set(stubs.FakeSessionForVMTests,
                       "VDI_resize_online", fake_vdi_resize)
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests,
                              product_version=(4, 0, 0),
                              product_brand='XenServer')

        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        network_info = fake_network.fake_get_instance_nw_info(self.stubs)
        image_meta = {'id': instance['image_ref'], 'disk_format': 'vhd'}
        conn.finish_migration(self.context, self.migration, instance,
                              dict(base_copy='hurr', cow='durr'),
                              network_info, image_meta, resize_instance=True,
                              block_device_info=None, power_on=power_on)
        self.assertEqual(self.called, True)
        self.assertEqual(self.fake_vm_start_called, power_on)

    def test_finish_migrate_power_on(self):
        self._test_finish_migrate(True)

    def test_finish_migrate_power_off(self):
        self._test_finish_migrate(False)

    def test_finish_migrate_no_local_storage(self):
        tiny_type = flavors.get_flavor_by_name('m1.tiny')
        tiny_type_id = tiny_type['id']
        self.instance_values.update({'instance_type_id': tiny_type_id,
                                     'root_gb': 0})
        instance = create_instance_with_system_metadata(self.context,
                                                        self.instance_values)

        def fake_vdi_resize(*args, **kwargs):
            raise Exception("This shouldn't be called")

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       "VDI_resize_online", fake_vdi_resize)
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        network_info = fake_network.fake_get_instance_nw_info(self.stubs)
        image_meta = {'id': instance['image_ref'], 'disk_format': 'vhd'}
        conn.finish_migration(self.context, self.migration, instance,
                              dict(base_copy='hurr', cow='durr'),
                              network_info, image_meta, resize_instance=True)

    def test_finish_migrate_no_resize_vdi(self):
        instance = create_instance_with_system_metadata(self.context,
                                                        self.instance_values)

        def fake_vdi_resize(*args, **kwargs):
            raise Exception("This shouldn't be called")

        self.stubs.Set(stubs.FakeSessionForVMTests,
                       "VDI_resize_online", fake_vdi_resize)
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        network_info = fake_network.fake_get_instance_nw_info(self.stubs)
        # Resize instance would be determined by the compute call
        image_meta = {'id': instance['image_ref'], 'disk_format': 'vhd'}
        conn.finish_migration(self.context, self.migration, instance,
                              dict(base_copy='hurr', cow='durr'),
                              network_info, image_meta, resize_instance=False)

    @stub_vm_utils_with_vdi_attached_here
    def test_migrate_too_many_partitions_no_resize_down(self):
        instance_values = self.instance_values
        instance_values['root_gb'] = 40
        instance = db.instance_create(self.context, instance_values)
        xenapi_fake.create_vm(instance['name'], 'Running')
        instance_type = db.flavor_get_by_name(self.context, 'm1.small')
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        def fake_get_partitions(partition):
            return [(1, 2, 3, 4), (1, 2, 3, 4)]

        self.stubs.Set(vm_utils, '_get_partitions', fake_get_partitions)

        self.assertRaises(exception.InstanceFaultRollback,
                          conn.migrate_disk_and_power_off,
                          self.context, instance,
                          '127.0.0.1', instance_type, None)

    @stub_vm_utils_with_vdi_attached_here
    def test_migrate_bad_fs_type_no_resize_down(self):
        instance_values = self.instance_values
        instance_values['root_gb'] = 40
        instance = db.instance_create(self.context, instance_values)
        xenapi_fake.create_vm(instance['name'], 'Running')
        instance_type = db.flavor_get_by_name(self.context, 'm1.small')
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        def fake_get_partitions(partition):
            return [(1, 2, 3, "ext2")]

        self.stubs.Set(vm_utils, '_get_partitions', fake_get_partitions)

        self.assertRaises(exception.InstanceFaultRollback,
                          conn.migrate_disk_and_power_off,
                          self.context, instance,
                          '127.0.0.1', instance_type, None)

    def test_migrate_rollback_when_resize_down_fs_fails(self):
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        vmops = conn._vmops
        virtapi = vmops._virtapi

        self.mox.StubOutWithMock(vmops, '_resize_ensure_vm_is_shutdown')
        self.mox.StubOutWithMock(vmops, '_apply_orig_vm_name_label')
        self.mox.StubOutWithMock(vm_utils, 'resize_disk')
        self.mox.StubOutWithMock(vmops, '_migrate_vhd')
        self.mox.StubOutWithMock(vm_utils, 'destroy_vdi')
        self.mox.StubOutWithMock(vm_utils, 'get_vdi_for_vm_safely')
        self.mox.StubOutWithMock(vmops, '_restore_orig_vm_and_cleanup_orphan')
        self.mox.StubOutWithMock(virtapi, 'instance_update')

        instance = {'auto_disk_config': True, 'uuid': 'uuid'}
        vm_ref = "vm_ref"
        dest = "dest"
        instance_type = "type"
        sr_path = "sr_path"

        virtapi.instance_update(self.context, 'uuid', {'progress': 20.0})
        vmops._resize_ensure_vm_is_shutdown(instance, vm_ref)
        vmops._apply_orig_vm_name_label(instance, vm_ref)
        old_vdi_ref = "old_ref"
        vm_utils.get_vdi_for_vm_safely(vmops._session, vm_ref).AndReturn(
            (old_vdi_ref, None))
        virtapi.instance_update(self.context, 'uuid', {'progress': 40.0})
        new_vdi_ref = "new_ref"
        new_vdi_uuid = "new_uuid"
        vm_utils.resize_disk(vmops._session, instance, old_vdi_ref,
            instance_type).AndReturn((new_vdi_ref, new_vdi_uuid))
        virtapi.instance_update(self.context, 'uuid', {'progress': 60.0})
        vmops._migrate_vhd(instance, new_vdi_uuid, dest,
                           sr_path, 0).AndRaise(
                                exception.ResizeError(reason="asdf"))

        vm_utils.destroy_vdi(vmops._session, new_vdi_ref)
        vmops._restore_orig_vm_and_cleanup_orphan(instance, None)

        self.mox.ReplayAll()

        self.assertRaises(exception.InstanceFaultRollback,
                          vmops._migrate_disk_resizing_down, self.context,
                          instance, dest, instance_type, vm_ref, sr_path)

    def test_resize_ensure_vm_is_shutdown_cleanly(self):
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        vmops = conn._vmops
        fake_instance = {'uuid': 'uuid'}

        self.mox.StubOutWithMock(vm_utils, 'is_vm_shutdown')
        self.mox.StubOutWithMock(vm_utils, 'clean_shutdown_vm')
        self.mox.StubOutWithMock(vm_utils, 'hard_shutdown_vm')

        vm_utils.is_vm_shutdown(vmops._session, "ref").AndReturn(False)
        vm_utils.clean_shutdown_vm(vmops._session, fake_instance,
            "ref").AndReturn(True)

        self.mox.ReplayAll()

        vmops._resize_ensure_vm_is_shutdown(fake_instance, "ref")

    def test_resize_ensure_vm_is_shutdown_forced(self):
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        vmops = conn._vmops
        fake_instance = {'uuid': 'uuid'}

        self.mox.StubOutWithMock(vm_utils, 'is_vm_shutdown')
        self.mox.StubOutWithMock(vm_utils, 'clean_shutdown_vm')
        self.mox.StubOutWithMock(vm_utils, 'hard_shutdown_vm')

        vm_utils.is_vm_shutdown(vmops._session, "ref").AndReturn(False)
        vm_utils.clean_shutdown_vm(vmops._session, fake_instance,
            "ref").AndReturn(False)
        vm_utils.hard_shutdown_vm(vmops._session, fake_instance,
            "ref").AndReturn(True)

        self.mox.ReplayAll()

        vmops._resize_ensure_vm_is_shutdown(fake_instance, "ref")

    def test_resize_ensure_vm_is_shutdown_fails(self):
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        vmops = conn._vmops
        fake_instance = {'uuid': 'uuid'}

        self.mox.StubOutWithMock(vm_utils, 'is_vm_shutdown')
        self.mox.StubOutWithMock(vm_utils, 'clean_shutdown_vm')
        self.mox.StubOutWithMock(vm_utils, 'hard_shutdown_vm')

        vm_utils.is_vm_shutdown(vmops._session, "ref").AndReturn(False)
        vm_utils.clean_shutdown_vm(vmops._session, fake_instance,
            "ref").AndReturn(False)
        vm_utils.hard_shutdown_vm(vmops._session, fake_instance,
            "ref").AndReturn(False)

        self.mox.ReplayAll()

        self.assertRaises(exception.ResizeError,
            vmops._resize_ensure_vm_is_shutdown, fake_instance, "ref")

    def test_resize_ensure_vm_is_shutdown_already_shutdown(self):
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        vmops = conn._vmops
        fake_instance = {'uuid': 'uuid'}

        self.mox.StubOutWithMock(vm_utils, 'is_vm_shutdown')
        self.mox.StubOutWithMock(vm_utils, 'clean_shutdown_vm')
        self.mox.StubOutWithMock(vm_utils, 'hard_shutdown_vm')

        vm_utils.is_vm_shutdown(vmops._session, "ref").AndReturn(True)

        self.mox.ReplayAll()

        vmops._resize_ensure_vm_is_shutdown(fake_instance, "ref")


class XenAPIImageTypeTestCase(test.NoDBTestCase):
    """Test ImageType class."""

    def test_to_string(self):
        # Can convert from type id to type string.
        self.assertEquals(
            vm_utils.ImageType.to_string(vm_utils.ImageType.KERNEL),
            vm_utils.ImageType.KERNEL_STR)

    def _assert_role(self, expected_role, image_type_id):
        self.assertEquals(
            expected_role,
            vm_utils.ImageType.get_role(image_type_id))

    def test_get_image_role_kernel(self):
        self._assert_role('kernel', vm_utils.ImageType.KERNEL)

    def test_get_image_role_ramdisk(self):
        self._assert_role('ramdisk', vm_utils.ImageType.RAMDISK)

    def test_get_image_role_disk(self):
        self._assert_role('root', vm_utils.ImageType.DISK)

    def test_get_image_role_disk_raw(self):
        self._assert_role('root', vm_utils.ImageType.DISK_RAW)

    def test_get_image_role_disk_vhd(self):
        self._assert_role('root', vm_utils.ImageType.DISK_VHD)


class XenAPIDetermineDiskImageTestCase(test.NoDBTestCase):
    """Unit tests for code that detects the ImageType."""
    def assert_disk_type(self, image_meta, expected_disk_type):
        actual = vm_utils.determine_disk_image_type(image_meta)
        self.assertEqual(expected_disk_type, actual)

    def test_machine(self):
        image_meta = {'id': 'a', 'disk_format': 'ami'}
        self.assert_disk_type(image_meta, vm_utils.ImageType.DISK)

    def test_raw(self):
        image_meta = {'id': 'a', 'disk_format': 'raw'}
        self.assert_disk_type(image_meta, vm_utils.ImageType.DISK_RAW)

    def test_vhd(self):
        image_meta = {'id': 'a', 'disk_format': 'vhd'}
        self.assert_disk_type(image_meta, vm_utils.ImageType.DISK_VHD)

    def test_none(self):
        image_meta = None
        self.assert_disk_type(image_meta, None)


class XenAPIDetermineIsPVTestCase(test.NoDBTestCase):
    """Unit tests for code that detects the PV status based on ImageType."""
    def assert_pv_status(self, disk_image_type, os_type, expected_pv_status):
        session = None
        vdi_ref = None
        actual = vm_utils.determine_is_pv(session, vdi_ref,
                                          disk_image_type, os_type)
        self.assertEqual(expected_pv_status, actual)

    def test_windows_vhd(self):
        self.assert_pv_status(vm_utils.ImageType.DISK_VHD, 'windows', False)

    def test_linux_vhd(self):
        self.assert_pv_status(vm_utils.ImageType.DISK_VHD, 'linux', True)

    def test_raw(self):
        self.assert_pv_status(vm_utils.ImageType.DISK_RAW, 'linux', False)

    def test_disk(self):
        self.assert_pv_status(vm_utils.ImageType.DISK, None, True)

    def test_iso(self):
        self.assert_pv_status(vm_utils.ImageType.DISK_ISO, None, False)

    def test_none(self):
        self.assert_pv_status(None, None, False)


class CompareVersionTestCase(test.NoDBTestCase):
    def test_less_than(self):
        # Test that cmp_version compares a as less than b.
        self.assertTrue(vmops.cmp_version('1.2.3.4', '1.2.3.5') < 0)

    def test_greater_than(self):
        # Test that cmp_version compares a as greater than b.
        self.assertTrue(vmops.cmp_version('1.2.3.5', '1.2.3.4') > 0)

    def test_equal(self):
        # Test that cmp_version compares a as equal to b.
        self.assertTrue(vmops.cmp_version('1.2.3.4', '1.2.3.4') == 0)

    def test_non_lexical(self):
        # Test that cmp_version compares non-lexically.
        self.assertTrue(vmops.cmp_version('1.2.3.10', '1.2.3.4') > 0)

    def test_length(self):
        # Test that cmp_version compares by length as last resort.
        self.assertTrue(vmops.cmp_version('1.2.3', '1.2.3.4') < 0)


class XenAPIHostTestCase(stubs.XenAPITestBase):
    """Tests HostState, which holds metrics from XenServer that get
    reported back to the Schedulers.
    """

    def setUp(self):
        super(XenAPIHostTestCase, self).setUp()
        self.flags(xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.context = context.get_admin_context()
        self.flags(use_local=True, group='conductor')
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

    def test_host_state(self):
        stats = self.conn.get_host_stats()
        self.assertEquals(stats['disk_total'], 40000)
        self.assertEquals(stats['disk_used'], 20000)
        self.assertEquals(stats['host_memory_total'], 10)
        self.assertEquals(stats['host_memory_overhead'], 20)
        self.assertEquals(stats['host_memory_free'], 30)
        self.assertEquals(stats['host_memory_free_computed'], 40)
        self.assertEquals(stats['hypervisor_hostname'], 'fake-xenhost')

    def test_host_state_missing_sr(self):
        def fake_safe_find_sr(session):
            raise exception.StorageRepositoryNotFound('not there')

        self.stubs.Set(vm_utils, 'safe_find_sr', fake_safe_find_sr)
        self.assertRaises(exception.StorageRepositoryNotFound,
                          self.conn.get_host_stats)

    def _test_host_action(self, method, action, expected=None):
        result = method('host', action)
        if not expected:
            expected = action
        self.assertEqual(result, expected)

    def test_host_reboot(self):
        self._test_host_action(self.conn.host_power_action, 'reboot')

    def test_host_shutdown(self):
        self._test_host_action(self.conn.host_power_action, 'shutdown')

    def test_host_startup(self):
        self.assertRaises(NotImplementedError,
                          self.conn.host_power_action, 'host', 'startup')

    def test_host_maintenance_on(self):
        self._test_host_action(self.conn.host_maintenance_mode,
                               True, 'on_maintenance')

    def test_host_maintenance_off(self):
        self._test_host_action(self.conn.host_maintenance_mode,
                               False, 'off_maintenance')

    def test_set_enable_host_enable(self):
        values = _create_service_entries(self.context, values={'nova':
            ['host']})
        self._test_host_action(self.conn.set_host_enabled, True, 'enabled')
        service = db.service_get_by_args(self.context, 'host', 'nova-compute')
        self.assertEquals(service.disabled, False)

    def test_set_enable_host_disable(self):
        values = _create_service_entries(self.context, values={'nova':
            ['host']})
        self._test_host_action(self.conn.set_host_enabled, False, 'disabled')
        service = db.service_get_by_args(self.context, 'host', 'nova-compute')
        self.assertEquals(service.disabled, True)

    def test_get_host_uptime(self):
        result = self.conn.get_host_uptime('host')
        self.assertEqual(result, 'fake uptime')

    def test_supported_instances_is_included_in_host_state(self):
        stats = self.conn.get_host_stats()
        self.assertTrue('supported_instances' in stats)

    def test_supported_instances_is_calculated_by_to_supported_instances(self):

        def to_supported_instances(somedata):
            self.assertEquals(None, somedata)
            return "SOMERETURNVALUE"
        self.stubs.Set(host, 'to_supported_instances', to_supported_instances)

        stats = self.conn.get_host_stats()
        self.assertEquals("SOMERETURNVALUE", stats['supported_instances'])

    def test_update_stats_caches_hostname(self):
        self.mox.StubOutWithMock(host, 'call_xenhost')
        self.mox.StubOutWithMock(vm_utils, 'scan_default_sr')
        self.mox.StubOutWithMock(self.conn._session, 'call_xenapi')
        data = {'disk_total': 0,
                'disk_used': 0,
                'disk_available': 0,
                'supported_instances': 0,
                'host_capabilities': [],
                'host_hostname': 'foo',
                }
        sr_rec = {
            'physical_size': 0,
            'physical_utilisation': 0,
            }

        for i in range(3):
            host.call_xenhost(mox.IgnoreArg(), 'host_data', {}).AndReturn(data)
            vm_utils.scan_default_sr(self.conn._session).AndReturn("ref")
            self.conn._session.call_xenapi('SR.get_record', "ref").AndReturn(
                sr_rec)
            if i == 2:
                # On the third call (the second below) change the hostname
                data = dict(data, host_hostname='bar')

        self.mox.ReplayAll()
        stats = self.conn.get_host_stats(refresh=True)
        self.assertEqual('foo', stats['hypervisor_hostname'])
        stats = self.conn.get_host_stats(refresh=True)
        self.assertEqual('foo', stats['hypervisor_hostname'])


class ToSupportedInstancesTestCase(test.NoDBTestCase):
    def test_default_return_value(self):
        self.assertEquals([],
            host.to_supported_instances(None))

    def test_return_value(self):
        self.assertEquals([('x86_64', 'xapi', 'xen')],
             host.to_supported_instances([u'xen-3.0-x86_64']))

    def test_invalid_values_do_not_break(self):
        self.assertEquals([('x86_64', 'xapi', 'xen')],
             host.to_supported_instances([u'xen-3.0-x86_64', 'spam']))

    def test_multiple_values(self):
        self.assertEquals(
            [
                ('x86_64', 'xapi', 'xen'),
                ('x86_32', 'xapi', 'hvm')
            ],
            host.to_supported_instances([u'xen-3.0-x86_64', 'hvm-3.0-x86_32'])
        )


class XenAPIAutoDiskConfigTestCase(stubs.XenAPITestBase):
    def setUp(self):
        super(XenAPIAutoDiskConfigTestCase, self).setUp()
        self.flags(xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self.user_id = 'fake'
        self.project_id = 'fake'

        self.instance_values = {'id': 1,
                  'project_id': self.project_id,
                  'user_id': self.user_id,
                  'image_ref': 1,
                  'kernel_id': 2,
                  'ramdisk_id': 3,
                  'root_gb': 20,
                  'instance_type_id': '3',  # m1.large
                  'os_type': 'linux',
                  'architecture': 'x86-64'}

        self.context = context.RequestContext(self.user_id, self.project_id)

        def fake_create_vbd(session, vm_ref, vdi_ref, userdevice,
                            vbd_type='disk', read_only=False, bootable=True,
                            osvol=False):
            pass

        self.stubs.Set(vm_utils, 'create_vbd', fake_create_vbd)

    def assertIsPartitionCalled(self, called):
        marker = {"partition_called": False}

        def fake_resize_part_and_fs(dev, start, old, new):
            marker["partition_called"] = True
        self.stubs.Set(vm_utils, "_resize_part_and_fs",
                       fake_resize_part_and_fs)

        ctx = context.RequestContext(self.user_id, self.project_id)
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())

        disk_image_type = vm_utils.ImageType.DISK_VHD
        instance = create_instance_with_system_metadata(self.context,
                                                        self.instance_values)
        vm_ref = xenapi_fake.create_vm(instance['name'], 'Halted')
        vdi_ref = xenapi_fake.create_vdi(instance['name'], 'fake')

        vdi_uuid = session.call_xenapi('VDI.get_record', vdi_ref)['uuid']
        vdis = {'root': {'uuid': vdi_uuid, 'ref': vdi_ref}}

        self.conn._vmops._attach_disks(instance, vm_ref, instance['name'],
                                       vdis, disk_image_type)

        self.assertEqual(marker["partition_called"], called)

    def test_instance_not_auto_disk_config(self):
        """Should not partition unless instance is marked as
        auto_disk_config.
        """
        self.instance_values['auto_disk_config'] = False
        self.assertIsPartitionCalled(False)

    @stub_vm_utils_with_vdi_attached_here
    def test_instance_auto_disk_config_doesnt_pass_fail_safes(self):
        # Should not partition unless fail safes pass.
        self.instance_values['auto_disk_config'] = True

        def fake_get_partitions(dev):
            return [(1, 0, 100, 'ext4'), (2, 100, 200, 'ext4')]
        self.stubs.Set(vm_utils, "_get_partitions",
                       fake_get_partitions)

        self.assertIsPartitionCalled(False)

    @stub_vm_utils_with_vdi_attached_here
    def test_instance_auto_disk_config_passes_fail_safes(self):
        """Should partition if instance is marked as auto_disk_config=True and
        virt-layer specific fail-safe checks pass.
        """
        self.instance_values['auto_disk_config'] = True

        def fake_get_partitions(dev):
            return [(1, 0, 100, 'ext4')]
        self.stubs.Set(vm_utils, "_get_partitions",
                       fake_get_partitions)

        self.assertIsPartitionCalled(True)


class XenAPIGenerateLocal(stubs.XenAPITestBase):
    """Test generating of local disks, like swap and ephemeral."""
    def setUp(self):
        super(XenAPIGenerateLocal, self).setUp()
        self.flags(xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        db_fakes.stub_out_db_instance_api(self.stubs)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self.user_id = 'fake'
        self.project_id = 'fake'

        self.instance_values = {'id': 1,
                  'project_id': self.project_id,
                  'user_id': self.user_id,
                  'image_ref': 1,
                  'kernel_id': 2,
                  'ramdisk_id': 3,
                  'root_gb': 20,
                  'instance_type_id': '3',  # m1.large
                  'os_type': 'linux',
                  'architecture': 'x86-64'}

        self.context = context.RequestContext(self.user_id, self.project_id)

        def fake_create_vbd(session, vm_ref, vdi_ref, userdevice,
                            vbd_type='disk', read_only=False, bootable=True,
                            osvol=False, empty=False, unpluggable=True):
            return session.call_xenapi('VBD.create', {'VM': vm_ref,
                                                      'VDI': vdi_ref})

        self.stubs.Set(vm_utils, 'create_vbd', fake_create_vbd)

    def assertCalled(self, instance,
                     disk_image_type=vm_utils.ImageType.DISK_VHD):
        ctx = context.RequestContext(self.user_id, self.project_id)
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())

        vm_ref = xenapi_fake.create_vm(instance['name'], 'Halted')
        vdi_ref = xenapi_fake.create_vdi(instance['name'], 'fake')

        vdi_uuid = session.call_xenapi('VDI.get_record', vdi_ref)['uuid']

        vdi_key = 'root'
        if disk_image_type == vm_utils.ImageType.DISK_ISO:
            vdi_key = 'iso'
        vdis = {vdi_key: {'uuid': vdi_uuid, 'ref': vdi_ref}}

        self.called = False
        self.conn._vmops._attach_disks(instance, vm_ref, instance['name'],
                                       vdis, disk_image_type)
        self.assertTrue(self.called)

    def test_generate_swap(self):
        # Test swap disk generation.
        instance_values = dict(self.instance_values, instance_type_id=5)
        instance = create_instance_with_system_metadata(self.context,
                                                        instance_values)

        def fake_generate_swap(*args, **kwargs):
            self.called = True
        self.stubs.Set(vm_utils, 'generate_swap', fake_generate_swap)

        self.assertCalled(instance)

    def test_generate_ephemeral(self):
        # Test ephemeral disk generation.
        instance_values = dict(self.instance_values, instance_type_id=4)
        instance = create_instance_with_system_metadata(self.context,
                                                        instance_values)

        def fake_generate_ephemeral(*args):
            self.called = True
        self.stubs.Set(vm_utils, 'generate_ephemeral', fake_generate_ephemeral)

        self.assertCalled(instance)

    def test_generate_iso_blank_root_disk(self):
        instance_values = dict(self.instance_values, instance_type_id=4)
        instance_values.pop('kernel_id')
        instance_values.pop('ramdisk_id')
        instance = create_instance_with_system_metadata(self.context,
                                                        instance_values)

        def fake_generate_ephemeral(*args):
            pass
        self.stubs.Set(vm_utils, 'generate_ephemeral', fake_generate_ephemeral)

        def fake_generate_iso(*args):
            self.called = True
        self.stubs.Set(vm_utils, 'generate_iso_blank_root_disk',
            fake_generate_iso)

        self.assertCalled(instance, vm_utils.ImageType.DISK_ISO)


class XenAPIBWCountersTestCase(stubs.XenAPITestBase):
    FAKE_VMS = {'test1:ref': dict(name_label='test1',
                                   other_config=dict(nova_uuid='hash'),
                                   domid='12',
                                   _vifmap={'0': "a:b:c:d...",
                                           '1': "e:f:12:q..."}),
                'test2:ref': dict(name_label='test2',
                                   other_config=dict(nova_uuid='hash'),
                                   domid='42',
                                   _vifmap={'0': "a:3:c:d...",
                                           '1': "e:f:42:q..."}),
               }

    def setUp(self):
        super(XenAPIBWCountersTestCase, self).setUp()
        self.stubs.Set(vm_utils, 'list_vms',
                       XenAPIBWCountersTestCase._fake_list_vms)
        self.flags(xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        def _fake_get_vif_device_map(vm_rec):
            return vm_rec['_vifmap']

        self.stubs.Set(self.conn._vmops, "_get_vif_device_map",
                                         _fake_get_vif_device_map)

    @classmethod
    def _fake_list_vms(cls, session):
        return cls.FAKE_VMS.iteritems()

    @staticmethod
    def _fake_fetch_bandwidth_mt(session):
        return {}

    @staticmethod
    def _fake_fetch_bandwidth(session):
        return {'42':
                    {'0': {'bw_in': 21024, 'bw_out': 22048},
                     '1': {'bw_in': 231337, 'bw_out': 221212121}},
                '12':
                    {'0': {'bw_in': 1024, 'bw_out': 2048},
                     '1': {'bw_in': 31337, 'bw_out': 21212121}},
                }

    def test_get_all_bw_counters(self):
        instances = [dict(name='test1', uuid='1-2-3'),
                     dict(name='test2', uuid='4-5-6')]

        self.stubs.Set(vm_utils, 'fetch_bandwidth',
                       self._fake_fetch_bandwidth)
        result = self.conn.get_all_bw_counters(instances)
        self.assertEqual(len(result), 4)
        self.assertIn(dict(uuid='1-2-3',
                           mac_address="a:b:c:d...",
                           bw_in=1024,
                           bw_out=2048), result)
        self.assertIn(dict(uuid='1-2-3',
                           mac_address="e:f:12:q...",
                           bw_in=31337,
                           bw_out=21212121), result)

        self.assertIn(dict(uuid='4-5-6',
                           mac_address="a:3:c:d...",
                           bw_in=21024,
                           bw_out=22048), result)
        self.assertIn(dict(uuid='4-5-6',
                           mac_address="e:f:42:q...",
                           bw_in=231337,
                           bw_out=221212121), result)

    def test_get_all_bw_counters_in_failure_case(self):
        """Test that get_all_bw_conters returns an empty list when
        no data returned from Xenserver.  c.f. bug #910045.
        """
        instances = [dict(name='instance-0001', uuid='1-2-3-4-5')]

        self.stubs.Set(vm_utils, 'fetch_bandwidth',
                       self._fake_fetch_bandwidth_mt)
        result = self.conn.get_all_bw_counters(instances)
        self.assertEqual(result, [])


# TODO(salvatore-orlando): this class and
# nova.tests.virt.test_libvirt.IPTablesFirewallDriverTestCase share a lot of
# code.  Consider abstracting common code in a base class for firewall driver
# testing.
class XenAPIDom0IptablesFirewallTestCase(stubs.XenAPITestBase):

    _in_rules = [
      '# Generated by iptables-save v1.4.10 on Sat Feb 19 00:03:19 2011',
      '*nat',
      ':PREROUTING ACCEPT [1170:189210]',
      ':INPUT ACCEPT [844:71028]',
      ':OUTPUT ACCEPT [5149:405186]',
      ':POSTROUTING ACCEPT [5063:386098]',
      '# Completed on Mon Dec  6 11:54:13 2010',
      '# Generated by iptables-save v1.4.4 on Mon Dec  6 11:54:13 2010',
      '*mangle',
      ':INPUT ACCEPT [969615:281627771]',
      ':FORWARD ACCEPT [0:0]',
      ':OUTPUT ACCEPT [915599:63811649]',
      ':nova-block-ipv4 - [0:0]',
      '[0:0] -A INPUT -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT ',
      '[0:0] -A FORWARD -d 192.168.122.0/24 -o virbr0 -m state --state RELATED'
      ',ESTABLISHED -j ACCEPT ',
      '[0:0] -A FORWARD -s 192.168.122.0/24 -i virbr0 -j ACCEPT ',
      '[0:0] -A FORWARD -i virbr0 -o virbr0 -j ACCEPT ',
      '[0:0] -A FORWARD -o virbr0 -j REJECT '
      '--reject-with icmp-port-unreachable ',
      '[0:0] -A FORWARD -i virbr0 -j REJECT '
      '--reject-with icmp-port-unreachable ',
      'COMMIT',
      '# Completed on Mon Dec  6 11:54:13 2010',
      '# Generated by iptables-save v1.4.4 on Mon Dec  6 11:54:13 2010',
      '*filter',
      ':INPUT ACCEPT [969615:281627771]',
      ':FORWARD ACCEPT [0:0]',
      ':OUTPUT ACCEPT [915599:63811649]',
      ':nova-block-ipv4 - [0:0]',
      '[0:0] -A INPUT -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT ',
      '[0:0] -A FORWARD -d 192.168.122.0/24 -o virbr0 -m state --state RELATED'
      ',ESTABLISHED -j ACCEPT ',
      '[0:0] -A FORWARD -s 192.168.122.0/24 -i virbr0 -j ACCEPT ',
      '[0:0] -A FORWARD -i virbr0 -o virbr0 -j ACCEPT ',
      '[0:0] -A FORWARD -o virbr0 -j REJECT '
      '--reject-with icmp-port-unreachable ',
      '[0:0] -A FORWARD -i virbr0 -j REJECT '
      '--reject-with icmp-port-unreachable ',
      'COMMIT',
      '# Completed on Mon Dec  6 11:54:13 2010',
    ]

    _in6_filter_rules = [
      '# Generated by ip6tables-save v1.4.4 on Tue Jan 18 23:47:56 2011',
      '*filter',
      ':INPUT ACCEPT [349155:75810423]',
      ':FORWARD ACCEPT [0:0]',
      ':OUTPUT ACCEPT [349256:75777230]',
      'COMMIT',
      '# Completed on Tue Jan 18 23:47:56 2011',
    ]

    def setUp(self):
        super(XenAPIDom0IptablesFirewallTestCase, self).setUp()
        self.flags(xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass',
                   instance_name_template='%d',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver')
        self.user_id = 'mappin'
        self.project_id = 'fake'
        stubs.stubout_session(self.stubs, stubs.FakeSessionForFirewallTests,
                              test_case=self)
        self.context = context.RequestContext(self.user_id, self.project_id)
        self.network = importutils.import_object(CONF.network_manager)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.fw = self.conn._vmops.firewall_driver

    def _create_instance_ref(self):
        return db.instance_create(self.context,
                                  {'user_id': self.user_id,
                                   'project_id': self.project_id,
                                   'instance_type_id': 1})

    def _create_test_security_group(self):
        admin_ctxt = context.get_admin_context()
        secgroup = db.security_group_create(admin_ctxt,
                                {'user_id': self.user_id,
                                 'project_id': self.project_id,
                                 'name': 'testgroup',
                                 'description': 'test group'})
        db.security_group_rule_create(admin_ctxt,
                                      {'parent_group_id': secgroup['id'],
                                       'protocol': 'icmp',
                                       'from_port': -1,
                                       'to_port': -1,
                                       'cidr': '192.168.11.0/24'})

        db.security_group_rule_create(admin_ctxt,
                                      {'parent_group_id': secgroup['id'],
                                       'protocol': 'icmp',
                                       'from_port': 8,
                                       'to_port': -1,
                                       'cidr': '192.168.11.0/24'})

        db.security_group_rule_create(admin_ctxt,
                                      {'parent_group_id': secgroup['id'],
                                       'protocol': 'tcp',
                                       'from_port': 80,
                                       'to_port': 81,
                                       'cidr': '192.168.10.0/24'})
        return secgroup

    def _validate_security_group(self):
        in_rules = filter(lambda l: not l.startswith('#'),
                          self._in_rules)
        for rule in in_rules:
            if 'nova' not in rule:
                self.assertTrue(rule in self._out_rules,
                                'Rule went missing: %s' % rule)

        instance_chain = None
        for rule in self._out_rules:
            # This is pretty crude, but it'll do for now
            # last two octets change
            if re.search('-d 192.168.[0-9]{1,3}.[0-9]{1,3} -j', rule):
                instance_chain = rule.split(' ')[-1]
                break
        self.assertTrue(instance_chain, "The instance chain wasn't added")
        security_group_chain = None
        for rule in self._out_rules:
            # This is pretty crude, but it'll do for now
            if '-A %s -j' % instance_chain in rule:
                security_group_chain = rule.split(' ')[-1]
                break
        self.assertTrue(security_group_chain,
                        "The security group chain wasn't added")

        regex = re.compile('\[0\:0\] -A .* -j ACCEPT -p icmp'
                           ' -s 192.168.11.0/24')
        self.assertTrue(len(filter(regex.match, self._out_rules)) > 0,
                        "ICMP acceptance rule wasn't added")

        regex = re.compile('\[0\:0\] -A .* -j ACCEPT -p icmp -m icmp'
                           ' --icmp-type 8 -s 192.168.11.0/24')
        self.assertTrue(len(filter(regex.match, self._out_rules)) > 0,
                        "ICMP Echo Request acceptance rule wasn't added")

        regex = re.compile('\[0\:0\] -A .* -j ACCEPT -p tcp --dport 80:81'
                           ' -s 192.168.10.0/24')
        self.assertTrue(len(filter(regex.match, self._out_rules)) > 0,
                        "TCP port 80/81 acceptance rule wasn't added")

    def test_static_filters(self):
        instance_ref = self._create_instance_ref()
        src_instance_ref = self._create_instance_ref()
        admin_ctxt = context.get_admin_context()
        secgroup = self._create_test_security_group()

        src_secgroup = db.security_group_create(admin_ctxt,
                                                {'user_id': self.user_id,
                                                 'project_id': self.project_id,
                                                 'name': 'testsourcegroup',
                                                 'description': 'src group'})
        db.security_group_rule_create(admin_ctxt,
                                      {'parent_group_id': secgroup['id'],
                                       'protocol': 'tcp',
                                       'from_port': 80,
                                       'to_port': 81,
                                       'group_id': src_secgroup['id']})

        db.instance_add_security_group(admin_ctxt, instance_ref['uuid'],
                                       secgroup['id'])
        db.instance_add_security_group(admin_ctxt, src_instance_ref['uuid'],
                                       src_secgroup['id'])
        instance_ref = db.instance_get(admin_ctxt, instance_ref['id'])
        src_instance_ref = db.instance_get(admin_ctxt, src_instance_ref['id'])

        network_model = fake_network.fake_get_instance_nw_info(self.stubs, 1)

        from nova.compute import utils as compute_utils
        self.stubs.Set(compute_utils, 'get_nw_info_for_instance',
                       lambda instance: network_model)

        self.fw.prepare_instance_filter(instance_ref, network_model)
        self.fw.apply_instance_filter(instance_ref, network_model)

        self._validate_security_group()
        # Extra test for TCP acceptance rules
        for ip in network_model.fixed_ips():
            if ip['version'] != 4:
                continue
            regex = re.compile('\[0\:0\] -A .* -j ACCEPT -p tcp'
                               ' --dport 80:81 -s %s' % ip['address'])
            self.assertTrue(len(filter(regex.match, self._out_rules)) > 0,
                            "TCP port 80/81 acceptance rule wasn't added")

        db.instance_destroy(admin_ctxt, instance_ref['uuid'])

    def test_filters_for_instance_with_ip_v6(self):
        self.flags(use_ipv6=True)
        network_info = fake_network.fake_get_instance_nw_info(self.stubs, 1)
        rulesv4, rulesv6 = self.fw._filters_for_instance("fake", network_info)
        self.assertEquals(len(rulesv4), 2)
        self.assertEquals(len(rulesv6), 1)

    def test_filters_for_instance_without_ip_v6(self):
        self.flags(use_ipv6=False)
        network_info = fake_network.fake_get_instance_nw_info(self.stubs, 1)
        rulesv4, rulesv6 = self.fw._filters_for_instance("fake", network_info)
        self.assertEquals(len(rulesv4), 2)
        self.assertEquals(len(rulesv6), 0)

    def test_multinic_iptables(self):
        ipv4_rules_per_addr = 1
        ipv4_addr_per_network = 2
        ipv6_rules_per_addr = 1
        ipv6_addr_per_network = 1
        networks_count = 5
        instance_ref = self._create_instance_ref()
        _get_instance_nw_info = fake_network.fake_get_instance_nw_info
        network_info = _get_instance_nw_info(self.stubs,
                                             networks_count,
                                             ipv4_addr_per_network)
        network_info[0]['network']['subnets'][0]['meta']['dhcp_server'] = \
            '1.1.1.1'
        ipv4_len = len(self.fw.iptables.ipv4['filter'].rules)
        ipv6_len = len(self.fw.iptables.ipv6['filter'].rules)
        inst_ipv4, inst_ipv6 = self.fw.instance_rules(instance_ref,
                                                      network_info)
        self.fw.prepare_instance_filter(instance_ref, network_info)
        ipv4 = self.fw.iptables.ipv4['filter'].rules
        ipv6 = self.fw.iptables.ipv6['filter'].rules
        ipv4_network_rules = len(ipv4) - len(inst_ipv4) - ipv4_len
        ipv6_network_rules = len(ipv6) - len(inst_ipv6) - ipv6_len
        # Extra rules are for the DHCP request
        rules = (ipv4_rules_per_addr * ipv4_addr_per_network *
                 networks_count) + 2
        self.assertEquals(ipv4_network_rules, rules)
        self.assertEquals(ipv6_network_rules,
                  ipv6_rules_per_addr * ipv6_addr_per_network * networks_count)

    def test_do_refresh_security_group_rules(self):
        admin_ctxt = context.get_admin_context()
        instance_ref = self._create_instance_ref()
        network_info = fake_network.fake_get_instance_nw_info(self.stubs, 1, 1)
        secgroup = self._create_test_security_group()
        db.instance_add_security_group(admin_ctxt, instance_ref['uuid'],
                                       secgroup['id'])
        self.fw.prepare_instance_filter(instance_ref, network_info)
        self.fw.instance_info[instance_ref['id']] = (instance_ref,
                                                     network_info)
        self._validate_security_group()
        # add a rule to the security group
        db.security_group_rule_create(admin_ctxt,
                                      {'parent_group_id': secgroup['id'],
                                       'protocol': 'udp',
                                       'from_port': 200,
                                       'to_port': 299,
                                       'cidr': '192.168.99.0/24'})
        #validate the extra rule
        self.fw.refresh_security_group_rules(secgroup)
        regex = re.compile('\[0\:0\] -A .* -j ACCEPT -p udp --dport 200:299'
                           ' -s 192.168.99.0/24')
        self.assertTrue(len(filter(regex.match, self._out_rules)) > 0,
                        "Rules were not updated properly."
                        "The rule for UDP acceptance is missing")

    def test_provider_firewall_rules(self):
        # setup basic instance data
        instance_ref = self._create_instance_ref()
        # FRAGILE: as in libvirt tests
        # peeks at how the firewall names chains
        chain_name = 'inst-%s' % instance_ref['id']

        network_info = fake_network.fake_get_instance_nw_info(self.stubs, 1, 1)
        self.fw.prepare_instance_filter(instance_ref, network_info)
        self.assertTrue('provider' in self.fw.iptables.ipv4['filter'].chains)
        rules = [rule for rule in self.fw.iptables.ipv4['filter'].rules
                      if rule.chain == 'provider']
        self.assertEqual(0, len(rules))

        admin_ctxt = context.get_admin_context()
        # add a rule and send the update message, check for 1 rule
        provider_fw0 = db.provider_fw_rule_create(admin_ctxt,
                                                  {'protocol': 'tcp',
                                                   'cidr': '10.99.99.99/32',
                                                   'from_port': 1,
                                                   'to_port': 65535})
        self.fw.refresh_provider_fw_rules()
        rules = [rule for rule in self.fw.iptables.ipv4['filter'].rules
                      if rule.chain == 'provider']
        self.assertEqual(1, len(rules))

        # Add another, refresh, and make sure number of rules goes to two
        provider_fw1 = db.provider_fw_rule_create(admin_ctxt,
                                                  {'protocol': 'udp',
                                                   'cidr': '10.99.99.99/32',
                                                   'from_port': 1,
                                                   'to_port': 65535})
        self.fw.refresh_provider_fw_rules()
        rules = [rule for rule in self.fw.iptables.ipv4['filter'].rules
                      if rule.chain == 'provider']
        self.assertEqual(2, len(rules))

        # create the instance filter and make sure it has a jump rule
        self.fw.prepare_instance_filter(instance_ref, network_info)
        self.fw.apply_instance_filter(instance_ref, network_info)
        inst_rules = [rule for rule in self.fw.iptables.ipv4['filter'].rules
                           if rule.chain == chain_name]
        jump_rules = [rule for rule in inst_rules if '-j' in rule.rule]
        provjump_rules = []
        # IptablesTable doesn't make rules unique internally
        for rule in jump_rules:
            if 'provider' in rule.rule and rule not in provjump_rules:
                provjump_rules.append(rule)
        self.assertEqual(1, len(provjump_rules))

        # remove a rule from the db, cast to compute to refresh rule
        db.provider_fw_rule_destroy(admin_ctxt, provider_fw1['id'])
        self.fw.refresh_provider_fw_rules()
        rules = [rule for rule in self.fw.iptables.ipv4['filter'].rules
                      if rule.chain == 'provider']
        self.assertEqual(1, len(rules))


class XenAPISRSelectionTestCase(stubs.XenAPITestBase):
    """Unit tests for testing we find the right SR."""
    def test_safe_find_sr_raise_exception(self):
        # Ensure StorageRepositoryNotFound is raise when wrong filter.
        self.flags(sr_matching_filter='yadayadayada')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        self.assertRaises(exception.StorageRepositoryNotFound,
                          vm_utils.safe_find_sr, session)

    def test_safe_find_sr_local_storage(self):
        # Ensure the default local-storage is found.
        self.flags(sr_matching_filter='other-config:i18n-key=local-storage')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        # This test is only guaranteed if there is one host in the pool
        self.assertEqual(len(xenapi_fake.get_all('host')), 1)
        host_ref = xenapi_fake.get_all('host')[0]
        pbd_refs = xenapi_fake.get_all('PBD')
        for pbd_ref in pbd_refs:
            pbd_rec = xenapi_fake.get_record('PBD', pbd_ref)
            if pbd_rec['host'] != host_ref:
                continue
            sr_rec = xenapi_fake.get_record('SR', pbd_rec['SR'])
            if sr_rec['other_config']['i18n-key'] == 'local-storage':
                local_sr = pbd_rec['SR']
        expected = vm_utils.safe_find_sr(session)
        self.assertEqual(local_sr, expected)

    def test_safe_find_sr_by_other_criteria(self):
        # Ensure the SR is found when using a different filter.
        self.flags(sr_matching_filter='other-config:my_fake_sr=true')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        host_ref = xenapi_fake.get_all('host')[0]
        local_sr = xenapi_fake.create_sr(name_label='Fake Storage',
                                         type='lvm',
                                         other_config={'my_fake_sr': 'true'},
                                         host_ref=host_ref)
        expected = vm_utils.safe_find_sr(session)
        self.assertEqual(local_sr, expected)

    def test_safe_find_sr_default(self):
        # Ensure the default SR is found regardless of other-config.
        self.flags(sr_matching_filter='default-sr:true')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        session = xenapi_conn.XenAPISession('test_url', 'root', 'test_pass',
                                            fake.FakeVirtAPI())
        pool_ref = session.call_xenapi('pool.get_all')[0]
        expected = vm_utils.safe_find_sr(session)
        self.assertEqual(session.call_xenapi('pool.get_default_SR', pool_ref),
                         expected)


def _create_service_entries(context, values={'avail_zone1': ['fake_host1',
                                                         'fake_host2'],
                                         'avail_zone2': ['fake_host3'], }):
    for avail_zone, hosts in values.iteritems():
        for host in hosts:
            db.service_create(context,
                              {'host': host,
                               'binary': 'nova-compute',
                               'topic': 'compute',
                               'report_count': 0})
    return values


class XenAPIAggregateTestCase(stubs.XenAPITestBase):
    """Unit tests for aggregate operations."""
    def setUp(self):
        super(XenAPIAggregateTestCase, self).setUp()
        self.flags(xenapi_connection_url='http://test_url',
                   xenapi_connection_username='test_user',
                   xenapi_connection_password='test_pass',
                   instance_name_template='%d',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver',
                   host='host',
                   compute_driver='xenapi.XenAPIDriver',
                   default_availability_zone='avail_zone1')
        self.flags(use_local=True, group='conductor')
        host_ref = xenapi_fake.get_all('host')[0]
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.context = context.get_admin_context()
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.compute = importutils.import_object(CONF.compute_manager)
        self.api = compute_api.AggregateAPI()
        values = {'name': 'test_aggr',
                  'metadata': {'availability_zone': 'test_zone',
                  pool_states.POOL_FLAG: 'XenAPI'}}
        self.aggr = db.aggregate_create(self.context, values)
        self.fake_metadata = {pool_states.POOL_FLAG: 'XenAPI',
                              'master_compute': 'host',
                              'availability_zone': 'fake_zone',
                              pool_states.KEY: pool_states.ACTIVE,
                              'host': xenapi_fake.get_record('host',
                                                             host_ref)['uuid']}

    def test_pool_add_to_aggregate_called_by_driver(self):

        calls = []

        def pool_add_to_aggregate(context, aggregate, host, slave_info=None):
            self.assertEquals("CONTEXT", context)
            self.assertEquals("AGGREGATE", aggregate)
            self.assertEquals("HOST", host)
            self.assertEquals("SLAVEINFO", slave_info)
            calls.append(pool_add_to_aggregate)
        self.stubs.Set(self.conn._pool,
                       "add_to_aggregate",
                       pool_add_to_aggregate)

        self.conn.add_to_aggregate("CONTEXT", "AGGREGATE", "HOST",
                                   slave_info="SLAVEINFO")

        self.assertTrue(pool_add_to_aggregate in calls)

    def test_pool_remove_from_aggregate_called_by_driver(self):

        calls = []

        def pool_remove_from_aggregate(context, aggregate, host,
                                       slave_info=None):
            self.assertEquals("CONTEXT", context)
            self.assertEquals("AGGREGATE", aggregate)
            self.assertEquals("HOST", host)
            self.assertEquals("SLAVEINFO", slave_info)
            calls.append(pool_remove_from_aggregate)
        self.stubs.Set(self.conn._pool,
                       "remove_from_aggregate",
                       pool_remove_from_aggregate)

        self.conn.remove_from_aggregate("CONTEXT", "AGGREGATE", "HOST",
                                        slave_info="SLAVEINFO")

        self.assertTrue(pool_remove_from_aggregate in calls)

    def test_add_to_aggregate_for_first_host_sets_metadata(self):
        def fake_init_pool(id, name):
            fake_init_pool.called = True
        self.stubs.Set(self.conn._pool, "_init_pool", fake_init_pool)

        aggregate = self._aggregate_setup()
        self.conn._pool.add_to_aggregate(self.context, aggregate, "host")
        result = db.aggregate_get(self.context, aggregate['id'])
        self.assertTrue(fake_init_pool.called)
        self.assertThat(self.fake_metadata,
                        matchers.DictMatches(result['metadetails']))

    def test_join_slave(self):
        # Ensure join_slave gets called when the request gets to master.
        def fake_join_slave(id, compute_uuid, host, url, user, password):
            fake_join_slave.called = True
        self.stubs.Set(self.conn._pool, "_join_slave", fake_join_slave)

        aggregate = self._aggregate_setup(hosts=['host', 'host2'],
                                          metadata=self.fake_metadata)
        self.conn._pool.add_to_aggregate(self.context, aggregate, "host2",
                                         dict(compute_uuid='fake_uuid',
                                         url='fake_url',
                                         user='fake_user',
                                         passwd='fake_pass',
                                         xenhost_uuid='fake_uuid'))
        self.assertTrue(fake_join_slave.called)

    def test_add_to_aggregate_first_host(self):
        def fake_pool_set_name_label(self, session, pool_ref, name):
            fake_pool_set_name_label.called = True
        self.stubs.Set(xenapi_fake.SessionBase, "pool_set_name_label",
                       fake_pool_set_name_label)
        self.conn._session.call_xenapi("pool.create", {"name": "asdf"})

        values = {"name": 'fake_aggregate',
                  'metadata': {'availability_zone': 'fake_zone'}}
        result = db.aggregate_create(self.context, values)
        metadata = {'availability_zone': 'fake_zone',
                    pool_states.POOL_FLAG: "XenAPI",
                    pool_states.KEY: pool_states.CREATED}
        db.aggregate_metadata_add(self.context, result['id'], metadata)

        db.aggregate_host_add(self.context, result['id'], "host")
        aggregate = db.aggregate_get(self.context, result['id'])
        self.assertEqual(["host"], aggregate['hosts'])
        self.assertEqual(metadata, aggregate['metadetails'])

        self.conn._pool.add_to_aggregate(self.context, aggregate, "host")
        self.assertTrue(fake_pool_set_name_label.called)

    def test_remove_from_aggregate_called(self):
        def fake_remove_from_aggregate(context, aggregate, host):
            fake_remove_from_aggregate.called = True
        self.stubs.Set(self.conn._pool,
                       "remove_from_aggregate",
                       fake_remove_from_aggregate)

        self.conn.remove_from_aggregate(None, None, None)
        self.assertTrue(fake_remove_from_aggregate.called)

    def test_remove_from_empty_aggregate(self):
        result = self._aggregate_setup()
        self.assertRaises(exception.InvalidAggregateAction,
                          self.conn._pool.remove_from_aggregate,
                          self.context, result, "test_host")

    def test_remove_slave(self):
        # Ensure eject slave gets called.
        def fake_eject_slave(id, compute_uuid, host_uuid):
            fake_eject_slave.called = True
        self.stubs.Set(self.conn._pool, "_eject_slave", fake_eject_slave)

        self.fake_metadata['host2'] = 'fake_host2_uuid'
        aggregate = self._aggregate_setup(hosts=['host', 'host2'],
                metadata=self.fake_metadata, aggr_state=pool_states.ACTIVE)
        self.conn._pool.remove_from_aggregate(self.context, aggregate, "host2")
        self.assertTrue(fake_eject_slave.called)

    def test_remove_master_solo(self):
        # Ensure metadata are cleared after removal.
        def fake_clear_pool(id):
            fake_clear_pool.called = True
        self.stubs.Set(self.conn._pool, "_clear_pool", fake_clear_pool)

        aggregate = self._aggregate_setup(metadata=self.fake_metadata)
        self.conn._pool.remove_from_aggregate(self.context, aggregate, "host")
        result = db.aggregate_get(self.context, aggregate['id'])
        self.assertTrue(fake_clear_pool.called)
        self.assertThat({'availability_zone': 'fake_zone',
                pool_states.POOL_FLAG: 'XenAPI',
                pool_states.KEY: pool_states.ACTIVE},
                matchers.DictMatches(result['metadetails']))

    def test_remote_master_non_empty_pool(self):
        # Ensure AggregateError is raised if removing the master.
        aggregate = self._aggregate_setup(hosts=['host', 'host2'],
                                          metadata=self.fake_metadata)

        self.assertRaises(exception.InvalidAggregateAction,
                          self.conn._pool.remove_from_aggregate,
                          self.context, aggregate, "host")

    def _aggregate_setup(self, aggr_name='fake_aggregate',
                         aggr_zone='fake_zone',
                         aggr_state=pool_states.CREATED,
                         hosts=['host'], metadata=None):
        values = {"name": aggr_name}
        result = db.aggregate_create(self.context, values,
                metadata={'availability_zone': aggr_zone})
        pool_flag = {pool_states.POOL_FLAG: "XenAPI",
                    pool_states.KEY: aggr_state}
        db.aggregate_metadata_add(self.context, result['id'], pool_flag)

        for host in hosts:
            db.aggregate_host_add(self.context, result['id'], host)
        if metadata:
            db.aggregate_metadata_add(self.context, result['id'], metadata)
        return db.aggregate_get(self.context, result['id'])

    def test_add_host_to_aggregate_invalid_changing_status(self):
        """Ensure InvalidAggregateAction is raised when adding host while
        aggregate is not ready.
        """
        aggregate = self._aggregate_setup(aggr_state=pool_states.CHANGING)
        self.assertRaises(exception.InvalidAggregateAction,
                          self.conn.add_to_aggregate, self.context,
                          aggregate, 'host')

    def test_add_host_to_aggregate_invalid_dismissed_status(self):
        """Ensure InvalidAggregateAction is raised when aggregate is
        deleted.
        """
        aggregate = self._aggregate_setup(aggr_state=pool_states.DISMISSED)
        self.assertRaises(exception.InvalidAggregateAction,
                          self.conn.add_to_aggregate, self.context,
                          aggregate, 'fake_host')

    def test_add_host_to_aggregate_invalid_error_status(self):
        """Ensure InvalidAggregateAction is raised when aggregate is
        in error.
        """
        aggregate = self._aggregate_setup(aggr_state=pool_states.ERROR)
        self.assertRaises(exception.InvalidAggregateAction,
                          self.conn.add_to_aggregate, self.context,
                          aggregate, 'fake_host')

    def test_remove_host_from_aggregate_error(self):
        # Ensure we can remove a host from an aggregate even if in error.
        values = _create_service_entries(self.context)
        fake_zone = values.keys()[0]
        aggr = self.api.create_aggregate(self.context,
                                         'fake_aggregate', fake_zone)
        # let's mock the fact that the aggregate is ready!
        metadata = {pool_states.POOL_FLAG: "XenAPI",
                    pool_states.KEY: pool_states.ACTIVE}
        db.aggregate_metadata_add(self.context, aggr['id'], metadata)
        for host in values[fake_zone]:
            aggr = self.api.add_host_to_aggregate(self.context,
                                                  aggr['id'], host)
        # let's mock the fact that the aggregate is in error!
        status = {'operational_state': pool_states.ERROR}
        expected = self.api.remove_host_from_aggregate(self.context,
                                                       aggr['id'],
                                                       values[fake_zone][0])
        self.assertEqual(len(aggr['hosts']) - 1, len(expected['hosts']))
        self.assertEqual(expected['metadata'][pool_states.KEY],
                         pool_states.ACTIVE)

    def test_remove_host_from_aggregate_invalid_dismissed_status(self):
        """Ensure InvalidAggregateAction is raised when aggregate is
        deleted.
        """
        aggregate = self._aggregate_setup(aggr_state=pool_states.DISMISSED)
        self.assertRaises(exception.InvalidAggregateAction,
                          self.conn.remove_from_aggregate, self.context,
                          aggregate, 'fake_host')

    def test_remove_host_from_aggregate_invalid_changing_status(self):
        """Ensure InvalidAggregateAction is raised when aggregate is
        changing.
        """
        aggregate = self._aggregate_setup(aggr_state=pool_states.CHANGING)
        self.assertRaises(exception.InvalidAggregateAction,
                          self.conn.remove_from_aggregate, self.context,
                          aggregate, 'fake_host')

    def test_add_aggregate_host_raise_err(self):
        # Ensure the undo operation works correctly on add.
        def fake_driver_add_to_aggregate(context, aggregate, host, **_ignore):
            raise exception.AggregateError(
                    aggregate_id='', action='', reason='')
        self.stubs.Set(self.compute.driver, "add_to_aggregate",
                       fake_driver_add_to_aggregate)
        metadata = {pool_states.POOL_FLAG: "XenAPI",
                    pool_states.KEY: pool_states.ACTIVE}
        db.aggregate_metadata_add(self.context, self.aggr['id'], metadata)
        db.aggregate_host_add(self.context, self.aggr['id'], 'fake_host')

        self.assertRaises(exception.AggregateError,
                          self.compute.add_aggregate_host,
                          self.context, "fake_host",
                          aggregate=jsonutils.to_primitive(self.aggr))
        excepted = db.aggregate_get(self.context, self.aggr['id'])
        self.assertEqual(excepted['metadetails'][pool_states.KEY],
                pool_states.ERROR)
        self.assertEqual(excepted['hosts'], [])


class MockComputeAPI(object):
    def __init__(self):
        self._mock_calls = []

    def add_aggregate_host(self, ctxt, aggregate,
                                     host_param, host, slave_info):
        self._mock_calls.append((
            self.add_aggregate_host, ctxt, aggregate,
            host_param, host, slave_info))

    def remove_aggregate_host(self, ctxt, aggregate_id, host_param,
                              host, slave_info):
        self._mock_calls.append((
            self.remove_aggregate_host, ctxt, aggregate_id,
            host_param, host, slave_info))


class StubDependencies(object):
    """Stub dependencies for ResourcePool."""

    def __init__(self):
        self.compute_rpcapi = MockComputeAPI()

    def _is_hv_pool(self, *_ignore):
        return True

    def _get_metadata(self, *_ignore):
        return {
            pool_states.KEY: {},
            'master_compute': 'master'
        }

    def _create_slave_info(self, *ignore):
        return "SLAVE_INFO"


class ResourcePoolWithStubs(StubDependencies, pool.ResourcePool):
    """A ResourcePool, use stub dependencies."""


class HypervisorPoolTestCase(test.NoDBTestCase):

    fake_aggregate = {
        'id': 98,
        'hosts': [],
        'metadetails': {
            'master_compute': 'master',
            pool_states.POOL_FLAG: {},
            pool_states.KEY: {}
            }
        }

    def test_slave_asks_master_to_add_slave_to_pool(self):
        slave = ResourcePoolWithStubs()

        slave.add_to_aggregate("CONTEXT", self.fake_aggregate, "slave")

        self.assertIn(
            (slave.compute_rpcapi.add_aggregate_host,
            "CONTEXT", jsonutils.to_primitive(self.fake_aggregate),
            "slave", "master", "SLAVE_INFO"),
            slave.compute_rpcapi._mock_calls)

    def test_slave_asks_master_to_remove_slave_from_pool(self):
        slave = ResourcePoolWithStubs()

        slave.remove_from_aggregate("CONTEXT", self.fake_aggregate, "slave")

        self.assertIn(
            (slave.compute_rpcapi.remove_aggregate_host,
            "CONTEXT", 98, "slave", "master", "SLAVE_INFO"),
            slave.compute_rpcapi._mock_calls)


class SwapXapiHostTestCase(test.NoDBTestCase):

    def test_swapping(self):
        self.assertEquals(
            "http://otherserver:8765/somepath",
            pool.swap_xapi_host(
                "http://someserver:8765/somepath", 'otherserver'))

    def test_no_port(self):
        self.assertEquals(
            "http://otherserver/somepath",
            pool.swap_xapi_host(
                "http://someserver/somepath", 'otherserver'))

    def test_no_path(self):
        self.assertEquals(
            "http://otherserver",
            pool.swap_xapi_host(
                "http://someserver", 'otherserver'))


class XenAPILiveMigrateTestCase(stubs.XenAPITestBase):
    """Unit tests for live_migration."""
    def setUp(self):
        super(XenAPILiveMigrateTestCase, self).setUp()
        self.flags(xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver',
                   host='host')
        db_fakes.stub_out_db_instance_api(self.stubs)
        self.context = context.get_admin_context()

    def test_live_migration_calls_vmops(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        def fake_live_migrate(context, instance_ref, dest, post_method,
                              recover_method, block_migration, migrate_data):
            fake_live_migrate.called = True

        self.stubs.Set(self.conn._vmops, "live_migrate", fake_live_migrate)

        self.conn.live_migration(None, None, None, None, None)
        self.assertTrue(fake_live_migrate.called)

    def test_pre_live_migration(self):
        # ensure method is present
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.conn.pre_live_migration(None, None, None, None, None)

    def test_post_live_migration_at_destination(self):
        # ensure method is present
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        fake_instance = "instance"
        fake_network_info = "network_info"

        def fake_fw(instance, network_info):
            self.assertEquals(instance, fake_instance)
            self.assertEquals(network_info, fake_network_info)
            fake_fw.called += 1

        fake_fw.called = 0
        _vmops = self.conn._vmops
        self.stubs.Set(_vmops.firewall_driver,
                       'setup_basic_filtering', fake_fw)
        self.stubs.Set(_vmops.firewall_driver,
                       'prepare_instance_filter', fake_fw)
        self.stubs.Set(_vmops.firewall_driver,
                       'apply_instance_filter', fake_fw)

        self.conn.post_live_migration_at_destination(None, fake_instance,
                                                     fake_network_info, None)
        self.assertEqual(fake_fw.called, 3)

    def test_check_can_live_migrate_destination_with_block_migration(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self.stubs.Set(vm_utils, "safe_find_sr", lambda _x: "asdf")

        expected = {'block_migration': True,
                    'migrate_data': {
                        'migrate_send_data': "fake_migrate_data",
                        'destination_sr_ref': 'asdf'
                        }
                    }
        result = self.conn.check_can_live_migrate_destination(self.context,
                              {'host': 'host'},
                              {}, {},
                              True, False)
        self.assertEqual(expected, result)

    def test_check_can_live_migrate_destination_block_migration_fails(self):
        stubs.stubout_session(self.stubs,
                              stubs.FakeSessionForFailedMigrateTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self.assertRaises(exception.MigrationError,
                          self.conn.check_can_live_migrate_destination,
                          self.context, {'host': 'host'},
                          {}, {},
                          True, False)

    def _add_default_live_migrate_stubs(self, conn):
        def fake_generate_vdi_map(destination_sr_ref, _vm_ref):
            pass

        def fake_get_iscsi_srs(destination_sr_ref, _vm_ref):
            return []

        def fake_get_vm_opaque_ref(instance):
            return "fake_vm"

        self.stubs.Set(conn._vmops, "_generate_vdi_map",
                       fake_generate_vdi_map)
        self.stubs.Set(conn._vmops, "_get_iscsi_srs",
                       fake_get_iscsi_srs)
        self.stubs.Set(conn._vmops, "_get_vm_opaque_ref",
                       fake_get_vm_opaque_ref)

    def test_check_can_live_migrate_source_with_block_migrate(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self._add_default_live_migrate_stubs(self.conn)

        dest_check_data = {'block_migration': True,
                           'migrate_data': {
                            'destination_sr_ref': None,
                            'migrate_send_data': None
                           }}
        result = self.conn.check_can_live_migrate_source(self.context,
                                                         {'host': 'host'},
                                                         dest_check_data)
        self.assertEqual(dest_check_data, result)

    def test_check_can_live_migrate_source_with_block_migrate_iscsi(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self._add_default_live_migrate_stubs(self.conn)

        def fake_get_iscsi_srs(destination_sr_ref, _vm_ref):
            return ['sr_ref']
        self.stubs.Set(self.conn._vmops, "_get_iscsi_srs",
                       fake_get_iscsi_srs)

        def fake_make_plugin_call(plugin, method, **args):
            return "true"
        self.stubs.Set(self.conn._vmops, "_make_plugin_call",
                       fake_make_plugin_call)

        dest_check_data = {'block_migration': True,
                           'migrate_data': {
                            'destination_sr_ref': None,
                            'migrate_send_data': None
                           }}
        result = self.conn.check_can_live_migrate_source(self.context,
                                                         {'host': 'host'},
                                                         dest_check_data)
        self.assertEqual(dest_check_data, result)

    def test_check_can_live_migrate_source_with_block_iscsi_fails(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self._add_default_live_migrate_stubs(self.conn)

        def fake_get_iscsi_srs(destination_sr_ref, _vm_ref):
            return ['sr_ref']
        self.stubs.Set(self.conn._vmops, "_get_iscsi_srs",
                       fake_get_iscsi_srs)

        def fake_make_plugin_call(plugin, method, **args):
            return {'returncode': 'error', 'message': 'Plugin not found'}
        self.stubs.Set(self.conn._vmops, "_make_plugin_call",
                       fake_make_plugin_call)

        dest_check_data = {'block_migration': True,
                           'migrate_data': {
                            'destination_sr_ref': None,
                            'migrate_send_data': None
                           }}

        self.assertRaises(exception.MigrationError,
                          self.conn.check_can_live_migrate_source,
                          self.context, {'host': 'host'},
                          {})

    def test_check_can_live_migrate_source_with_block_migrate_fails(self):
        stubs.stubout_session(self.stubs,
                              stubs.FakeSessionForFailedMigrateTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self._add_default_live_migrate_stubs(self.conn)

        dest_check_data = {'block_migration': True,
                           'migrate_data': {
                            'destination_sr_ref': None,
                            'migrate_send_data': None
                           }}
        self.assertRaises(exception.MigrationError,
                          self.conn.check_can_live_migrate_source,
                          self.context,
                          {'host': 'host'},
                          dest_check_data)

    def test_check_can_live_migrate_works(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        class fake_aggregate:
            def __init__(self):
                self.metadetails = {"host": "test_host_uuid"}

        def fake_aggregate_get_by_host(context, host, key=None):
            self.assertEqual(CONF.host, host)
            return [fake_aggregate()]

        self.stubs.Set(db, "aggregate_get_by_host",
                fake_aggregate_get_by_host)
        self.conn.check_can_live_migrate_destination(self.context,
                {'host': 'host'}, False, False)

    def test_check_can_live_migrate_fails(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        class fake_aggregate:
            def __init__(self):
                self.metadetails = {"dest_other": "test_host_uuid"}

        def fake_aggregate_get_by_host(context, host, key=None):
            self.assertEqual(CONF.host, host)
            return [fake_aggregate()]

        self.stubs.Set(db, "aggregate_get_by_host",
                      fake_aggregate_get_by_host)
        self.assertRaises(exception.MigrationError,
                          self.conn.check_can_live_migrate_destination,
                          self.context, {'host': 'host'}, None, None)

    def test_live_migration(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        def fake_get_vm_opaque_ref(instance):
            return "fake_vm"
        self.stubs.Set(self.conn._vmops, "_get_vm_opaque_ref",
                       fake_get_vm_opaque_ref)

        def fake_get_host_opaque_ref(context, destination_hostname):
            return "fake_host"
        self.stubs.Set(self.conn._vmops, "_get_host_opaque_ref",
                       fake_get_host_opaque_ref)

        def post_method(context, instance, destination_hostname,
                        block_migration):
            post_method.called = True

        self.conn.live_migration(self.conn, None, None, post_method, None)

        self.assertTrue(post_method.called, "post_method.called")

    def test_live_migration_on_failure(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        def fake_get_vm_opaque_ref(instance):
            return "fake_vm"
        self.stubs.Set(self.conn._vmops, "_get_vm_opaque_ref",
                       fake_get_vm_opaque_ref)

        def fake_get_host_opaque_ref(context, destination_hostname):
            return "fake_host"
        self.stubs.Set(self.conn._vmops, "_get_host_opaque_ref",
                       fake_get_host_opaque_ref)

        def fake_call_xenapi(*args):
            raise NotImplementedError()
        self.stubs.Set(self.conn._vmops._session, "call_xenapi",
                       fake_call_xenapi)

        def recover_method(context, instance, destination_hostname,
                        block_migration):
            recover_method.called = True

        self.assertRaises(NotImplementedError, self.conn.live_migration,
                          self.conn, None, None, None, recover_method)
        self.assertTrue(recover_method.called, "recover_method.called")

    def test_live_migration_calls_post_migration(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self._add_default_live_migrate_stubs(self.conn)

        def post_method(context, instance, destination_hostname,
                        block_migration):
            post_method.called = True

        # pass block_migration = True and migrate data
        migrate_data = {"destination_sr_ref": "foo",
                        "migrate_send_data": "bar"}
        self.conn.live_migration(self.conn, None, None, post_method, None,
                                 True, migrate_data)
        self.assertTrue(post_method.called, "post_method.called")

    def test_live_migration_block_cleans_srs(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self._add_default_live_migrate_stubs(self.conn)

        def fake_get_iscsi_srs(context, instance):
            return ['sr_ref']
        self.stubs.Set(self.conn._vmops, "_get_iscsi_srs",
                       fake_get_iscsi_srs)

        def fake_forget_sr(context, instance):
            fake_forget_sr.called = True
        self.stubs.Set(volume_utils, "forget_sr",
                       fake_forget_sr)

        def post_method(context, instance, destination_hostname,
                        block_migration):
            post_method.called = True

        migrate_data = {"destination_sr_ref": "foo",
                        "migrate_send_data": "bar"}
        self.conn.live_migration(self.conn, None, None, post_method, None,
                                 True, migrate_data)

        self.assertTrue(post_method.called, "post_method.called")
        self.assertTrue(fake_forget_sr.called, "forget_sr.called")

    def test_live_migration_with_block_migration_raises_invalid_param(self):
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        def fake_get_vm_opaque_ref(instance):
            return "fake_vm"
        self.stubs.Set(self.conn._vmops, "_get_vm_opaque_ref",
                       fake_get_vm_opaque_ref)

        def recover_method(context, instance, destination_hostname,
                           block_migration):
            recover_method.called = True
        # pass block_migration = True and no migrate data
        self.assertRaises(exception.InvalidParameterValue,
                          self.conn.live_migration, self.conn,
                          None, None, None, recover_method, True, None)
        self.assertTrue(recover_method.called, "recover_method.called")

    def test_live_migration_with_block_migration_fails_migrate_send(self):
        stubs.stubout_session(self.stubs,
                              stubs.FakeSessionForFailedMigrateTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self._add_default_live_migrate_stubs(self.conn)

        def recover_method(context, instance, destination_hostname,
                           block_migration):
            recover_method.called = True
        # pass block_migration = True and migrate data
        migrate_data = dict(destination_sr_ref='foo', migrate_send_data='bar')
        self.assertRaises(exception.MigrationError,
                          self.conn.live_migration, self.conn,
                          None, None, None, recover_method, True, migrate_data)
        self.assertTrue(recover_method.called, "recover_method.called")

    def test_live_migrate_block_migration_xapi_call_parameters(self):

        fake_vdi_map = object()

        class Session(xenapi_fake.SessionBase):
            def VM_migrate_send(self_, session, vmref, migrate_data, islive,
                                vdi_map, vif_map, options):
                self.assertEquals('SOMEDATA', migrate_data)
                self.assertEquals(fake_vdi_map, vdi_map)

        stubs.stubout_session(self.stubs, Session)

        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self._add_default_live_migrate_stubs(conn)

        def fake_generate_vdi_map(destination_sr_ref, _vm_ref):
            return fake_vdi_map

        self.stubs.Set(conn._vmops, "_generate_vdi_map",
                       fake_generate_vdi_map)

        def dummy_callback(*args, **kwargs):
            pass

        conn.live_migration(
            self.context, instance_ref=dict(name='ignore'), dest=None,
            post_method=dummy_callback, recover_method=dummy_callback,
            block_migration="SOMEDATA",
            migrate_data=dict(migrate_send_data='SOMEDATA',
                              destination_sr_ref="TARGET_SR_OPAQUE_REF"))

    def test_live_migrate_pool_migration_xapi_call_parameters(self):

        class Session(xenapi_fake.SessionBase):
            def VM_pool_migrate(self_, session, vm_ref, host_ref, options):
                self.assertEquals("fake_ref", host_ref)
                self.assertEquals({"live": "true"}, options)
                raise IOError()

        stubs.stubout_session(self.stubs, Session)
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)
        self._add_default_live_migrate_stubs(conn)

        def fake_get_host_opaque_ref(context, destination):
            return "fake_ref"

        self.stubs.Set(conn._vmops, "_get_host_opaque_ref",
                       fake_get_host_opaque_ref)

        def dummy_callback(*args, **kwargs):
            pass

        self.assertRaises(IOError, conn.live_migration,
            self.context, instance_ref=dict(name='ignore'), dest=None,
            post_method=dummy_callback, recover_method=dummy_callback,
            block_migration=False, migrate_data={})

    def test_generate_vdi_map(self):
        stubs.stubout_session(self.stubs, xenapi_fake.SessionBase)
        conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        vm_ref = "fake_vm_ref"

        def fake_find_sr(_session):
            self.assertEquals(conn._session, _session)
            return "source_sr_ref"
        self.stubs.Set(vm_utils, "safe_find_sr", fake_find_sr)

        def fake_get_instance_vdis_for_sr(_session, _vm_ref, _sr_ref):
            self.assertEquals(conn._session, _session)
            self.assertEquals(vm_ref, _vm_ref)
            self.assertEquals("source_sr_ref", _sr_ref)
            return ["vdi0", "vdi1"]

        self.stubs.Set(vm_utils, "get_instance_vdis_for_sr",
                       fake_get_instance_vdis_for_sr)

        result = conn._vmops._generate_vdi_map("dest_sr_ref", vm_ref)

        self.assertEquals({"vdi0": "dest_sr_ref",
                           "vdi1": "dest_sr_ref"}, result)


class XenAPIInjectMetadataTestCase(stubs.XenAPITestBase):
    def setUp(self):
        super(XenAPIInjectMetadataTestCase, self).setUp()
        self.flags(xenapi_connection_url='test_url',
                   xenapi_connection_password='test_pass',
                   firewall_driver='nova.virt.xenapi.firewall.'
                                   'Dom0IptablesFirewallDriver')
        stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
        self.conn = xenapi_conn.XenAPIDriver(fake.FakeVirtAPI(), False)

        self.xenstore = dict(persist={}, ephem={})

        self.called_fake_get_vm_opaque_ref = False

        def fake_get_vm_opaque_ref(inst, instance):
            self.called_fake_get_vm_opaque_ref = True
            if instance["uuid"] == "not_found":
                raise exception.NotFound
            self.assertEqual(instance, {'uuid': 'fake'})
            return 'vm_ref'

        def fake_add_to_param_xenstore(inst, vm_ref, key, val):
            self.assertEqual(vm_ref, 'vm_ref')
            self.xenstore['persist'][key] = val

        def fake_remove_from_param_xenstore(inst, vm_ref, key):
            self.assertEqual(vm_ref, 'vm_ref')
            if key in self.xenstore['persist']:
                del self.xenstore['persist'][key]

        def fake_write_to_xenstore(inst, instance, path, value, vm_ref=None):
            self.assertEqual(instance, {'uuid': 'fake'})
            self.assertEqual(vm_ref, 'vm_ref')
            self.xenstore['ephem'][path] = jsonutils.dumps(value)

        def fake_delete_from_xenstore(inst, instance, path, vm_ref=None):
            self.assertEqual(instance, {'uuid': 'fake'})
            self.assertEqual(vm_ref, 'vm_ref')
            if path in self.xenstore['ephem']:
                del self.xenstore['ephem'][path]

        self.stubs.Set(vmops.VMOps, '_get_vm_opaque_ref',
                       fake_get_vm_opaque_ref)
        self.stubs.Set(vmops.VMOps, '_add_to_param_xenstore',
                       fake_add_to_param_xenstore)
        self.stubs.Set(vmops.VMOps, '_remove_from_param_xenstore',
                       fake_remove_from_param_xenstore)
        self.stubs.Set(vmops.VMOps, '_write_to_xenstore',
                       fake_write_to_xenstore)
        self.stubs.Set(vmops.VMOps, '_delete_from_xenstore',
                       fake_delete_from_xenstore)

    def test_inject_instance_metadata(self):

        # Add some system_metadata to ensure it doesn't get added
        # to xenstore
        instance = dict(metadata=[{'key': 'a', 'value': 1},
                                  {'key': 'b', 'value': 2},
                                  {'key': 'c', 'value': 3},
                                  # Check xenstore key sanitizing
                                  {'key': 'hi.there', 'value': 4},
                                  {'key': 'hi!t.e/e', 'value': 5}],
                                  # Check xenstore key sanitizing
                        system_metadata=[{'key': 'sys_a', 'value': 1},
                                         {'key': 'sys_b', 'value': 2},
                                         {'key': 'sys_c', 'value': 3}],
                        uuid='fake')
        self.conn._vmops._inject_instance_metadata(instance, 'vm_ref')

        self.assertEqual(self.xenstore, {
                'persist': {
                    'vm-data/user-metadata/a': '1',
                    'vm-data/user-metadata/b': '2',
                    'vm-data/user-metadata/c': '3',
                    'vm-data/user-metadata/hi_there': '4',
                    'vm-data/user-metadata/hi_t_e_e': '5',
                    },
                'ephem': {},
                })

    def test_change_instance_metadata_add(self):
        # Test XenStore key sanitizing here, too.
        diff = {'test.key': ['+', 4]}
        instance = {'uuid': 'fake'}
        self.xenstore = {
            'persist': {
                'vm-data/user-metadata/a': '1',
                'vm-data/user-metadata/b': '2',
                'vm-data/user-metadata/c': '3',
                },
            'ephem': {
                'vm-data/user-metadata/a': '1',
                'vm-data/user-metadata/b': '2',
                'vm-data/user-metadata/c': '3',
                },
            }

        self.conn._vmops.change_instance_metadata(instance, diff)

        self.assertEqual(self.xenstore, {
                'persist': {
                    'vm-data/user-metadata/a': '1',
                    'vm-data/user-metadata/b': '2',
                    'vm-data/user-metadata/c': '3',
                    'vm-data/user-metadata/test_key': '4',
                    },
                'ephem': {
                    'vm-data/user-metadata/a': '1',
                    'vm-data/user-metadata/b': '2',
                    'vm-data/user-metadata/c': '3',
                    'vm-data/user-metadata/test_key': '4',
                    },
                })

    def test_change_instance_metadata_update(self):
        diff = dict(b=['+', 4])
        instance = {'uuid': 'fake'}
        self.xenstore = {
            'persist': {
                'vm-data/user-metadata/a': '1',
                'vm-data/user-metadata/b': '2',
                'vm-data/user-metadata/c': '3',
                },
            'ephem': {
                'vm-data/user-metadata/a': '1',
                'vm-data/user-metadata/b': '2',
                'vm-data/user-metadata/c': '3',
                },
            }

        self.conn._vmops.change_instance_metadata(instance, diff)

        self.assertEqual(self.xenstore, {
                'persist': {
                    'vm-data/user-metadata/a': '1',
                    'vm-data/user-metadata/b': '4',
                    'vm-data/user-metadata/c': '3',
                    },
                'ephem': {
                    'vm-data/user-metadata/a': '1',
                    'vm-data/user-metadata/b': '4',
                    'vm-data/user-metadata/c': '3',
                    },
                })

    def test_change_instance_metadata_delete(self):
        diff = dict(b=['-'])
        instance = {'uuid': 'fake'}
        self.xenstore = {
            'persist': {
                'vm-data/user-metadata/a': '1',
                'vm-data/user-metadata/b': '2',
                'vm-data/user-metadata/c': '3',
                },
            'ephem': {
                'vm-data/user-metadata/a': '1',
                'vm-data/user-metadata/b': '2',
                'vm-data/user-metadata/c': '3',
                },
            }

        self.conn._vmops.change_instance_metadata(instance, diff)

        self.assertEqual(self.xenstore, {
                'persist': {
                    'vm-data/user-metadata/a': '1',
                    'vm-data/user-metadata/c': '3',
                    },
                'ephem': {
                    'vm-data/user-metadata/a': '1',
                    'vm-data/user-metadata/c': '3',
                    },
                })

    def test_change_instance_metadata_not_found(self):
        instance = {'uuid': 'not_found'}
        self.conn._vmops.change_instance_metadata(instance, "fake_diff")
        self.assertTrue(self.called_fake_get_vm_opaque_ref)


class XenAPISessionTestCase(test.NoDBTestCase):
    def _get_mock_xapisession(self, software_version):
        class MockXapiSession(xenapi_conn.XenAPISession):
            def __init__(_ignore):
                "Skip the superclass's dirty init"

            def _get_software_version(_ignore):
                return software_version

        return MockXapiSession()

    def test_local_session(self):
        session = self._get_mock_xapisession({})
        session.is_local_connection = True
        session.XenAPI = self.mox.CreateMockAnything()
        session.XenAPI.xapi_local().AndReturn("local_connection")

        self.mox.ReplayAll()
        self.assertEqual("local_connection",
                         session._create_session("unix://local"))

    def test_remote_session(self):
        session = self._get_mock_xapisession({})
        session.is_local_connection = False
        session.XenAPI = self.mox.CreateMockAnything()
        session.XenAPI.Session("url").AndReturn("remote_connection")

        self.mox.ReplayAll()
        self.assertEqual("remote_connection", session._create_session("url"))

    def test_get_product_version_product_brand_does_not_fail(self):
        session = self._get_mock_xapisession({
                    'build_number': '0',
                    'date': '2012-08-03',
                    'hostname': 'komainu',
                    'linux': '3.2.0-27-generic',
                    'network_backend': 'bridge',
                    'platform_name': 'XCP_Kronos',
                    'platform_version': '1.6.0',
                    'xapi': '1.3',
                    'xen': '4.1.2',
                    'xencenter_max': '1.10',
                    'xencenter_min': '1.10'
                })

        self.assertEquals(
            ((1, 6, 0), None),
            session._get_product_version_and_brand()
        )

    def test_get_product_version_product_brand_xs_6(self):
        session = self._get_mock_xapisession({
                    'product_brand': 'XenServer',
                    'product_version': '6.0.50',
                    'platform_version': '0.0.1'
                })

        self.assertEquals(
            ((6, 0, 50), 'XenServer'),
            session._get_product_version_and_brand()
        )

    def test_verify_plugin_version_same(self):
        session = self._get_mock_xapisession({})

        session.PLUGIN_REQUIRED_VERSION = '2.4'

        self.mox.StubOutWithMock(session, 'call_plugin_serialized')
        session.call_plugin_serialized('nova_plugin_version', 'get_version',
                            ).AndReturn("2.4")

        self.mox.ReplayAll()
        session._verify_plugin_version()

    def test_verify_plugin_version_compatible(self):
        session = self._get_mock_xapisession({})
        session.XenAPI = xenapi_fake.FakeXenAPI()

        session.PLUGIN_REQUIRED_VERSION = '2.4'

        self.mox.StubOutWithMock(session, 'call_plugin_serialized')
        session.call_plugin_serialized('nova_plugin_version', 'get_version',
                            ).AndReturn("2.5")

        self.mox.ReplayAll()
        session._verify_plugin_version()

    def test_verify_plugin_version_bad_maj(self):
        session = self._get_mock_xapisession({})
        session.XenAPI = xenapi_fake.FakeXenAPI()

        session.PLUGIN_REQUIRED_VERSION = '2.4'

        self.mox.StubOutWithMock(session, 'call_plugin_serialized')
        session.call_plugin_serialized('nova_plugin_version', 'get_version',
                            ).AndReturn("3.0")

        self.mox.ReplayAll()
        self.assertRaises(xenapi_fake.Failure, session._verify_plugin_version)

    def test_verify_plugin_version_bad_min(self):
        session = self._get_mock_xapisession({})
        session.XenAPI = xenapi_fake.FakeXenAPI()

        session.PLUGIN_REQUIRED_VERSION = '2.4'

        self.mox.StubOutWithMock(session, 'call_plugin_serialized')
        session.call_plugin_serialized('nova_plugin_version', 'get_version',
                            ).AndReturn("2.3")

        self.mox.ReplayAll()
        self.assertRaises(xenapi_fake.Failure, session._verify_plugin_version)

    def test_verify_current_version_matches(self):
        session = self._get_mock_xapisession({})

        # Import the plugin to extract its version
        path = os.path.dirname(__file__)
        rel_path_elem = "../../../../plugins/xenserver/xenapi/etc/xapi.d/" \
            "plugins/nova_plugin_version"
        for elem in rel_path_elem.split('/'):
            path = os.path.join(path, elem)
        path = os.path.realpath(path)

        plugin_version = None
        with open(path) as plugin_file:
            for line in plugin_file:
                if "PLUGIN_VERSION = " in line:
                    print line
                    plugin_version = line.strip()[17:].strip('"')

        self.assertEquals(session.PLUGIN_REQUIRED_VERSION,
                          plugin_version)


class XenAPIFakeTestCase(test.NoDBTestCase):
    def test_query_matches(self):
        record = {'a': '1', 'b': '2', 'c_d': '3'}

        tests = {'field "a"="1"': True,
                 'field "b"="2"': True,
                 'field "b"="4"': False,
                 'not field "b"="4"': True,
                 'field "a"="1" and field "b"="4"': False,
                 'field "a"="1" or field "b"="4"': True,
                 'field "c__d"="3"': True,
                 'field \'b\'=\'2\'': True,
                 }

        for query in tests.keys():
            expected = tests[query]
            fail_msg = "for test '%s'" % query
            self.assertEqual(xenapi_fake._query_matches(record, query),
                             expected, fail_msg)

    def test_query_bad_format(self):
        record = {'a': '1', 'b': '2', 'c': '3'}

        tests = ['"a"="1" or "b"="4"',
                 'a=1',
                 ]

        for query in tests:
            fail_msg = "for test '%s'" % query
            self.assertFalse(xenapi_fake._query_matches(record, query),
                             fail_msg)
