text: #    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.
  
  import mock
  
  from nova import objects
  from nova.scheduler.filters import pci_passthrough_filter
  from nova import test
  from nova.tests.unit.scheduler import fakes
  
  
  class TestPCIPassthroughFilter(test.NoDBTestCase):
  
      def setUp(self):
          super(TestPCIPassthroughFilter, self).setUp()
          self.filt_cls = pci_passthrough_filter.PciPassthroughFilter()
  
      def test_pci_passthrough_pass(self):
          pci_stats_mock = mock.MagicMock()
          pci_stats_mock.support_requests.return_value = True
          request = objects.InstancePCIRequest(count=1,
              spec=[{'vendor_id': '8086'}])
          requests = objects.InstancePCIRequests(requests=[request])
          filter_properties = {'pci_requests': requests}
          host = fakes.FakeHostState(
              'host1', 'node1',
              attribute_dict={'pci_stats': pci_stats_mock})
          self.assertTrue(self.filt_cls.host_passes(host, filter_properties))
          pci_stats_mock.support_requests.assert_called_once_with(
              requests.requests)
  
      def test_pci_passthrough_fail(self):
          pci_stats_mock = mock.MagicMock()
          pci_stats_mock.support_requests.return_value = False
          request = objects.InstancePCIRequest(count=1,
              spec=[{'vendor_id': '8086'}])
          requests = objects.InstancePCIRequests(requests=[request])
          filter_properties = {'pci_requests': requests}
          host = fakes.FakeHostState(
              'host1', 'node1',
              attribute_dict={'pci_stats': pci_stats_mock})
          self.assertFalse(self.filt_cls.host_passes(host, filter_properties))
          pci_stats_mock.support_requests.assert_called_once_with(
              requests.requests)
  
      def test_pci_passthrough_no_pci_request(self):
          filter_properties = {}
          host = fakes.FakeHostState('h1', 'n1', {})
          self.assertTrue(self.filt_cls.host_passes(host, filter_properties))
  
      def test_pci_passthrough_compute_stats(self):
          requests = [{'count': 1, 'spec': [{'vendor_id': '8086'}]}]
          filter_properties = {'pci_requests': requests}
          host = fakes.FakeHostState(
              'host1', 'node1',
              attribute_dict={})
          self.assertRaises(AttributeError, self.filt_cls.host_passes,
                            host, filter_properties)
  