104 lines
4.4 KiB
Python
104 lines
4.4 KiB
Python
# Copyright 2017 IBM Corp.
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#
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import fixtures
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import mock
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from nova import test
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from pypowervm.wrappers import storage as pvm_stor
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from pypowervm.wrappers import virtual_io_server as pvm_vios
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from nova_powervm.virt.powervm.disk import imagecache as imagecache
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class TestImageCache(test.NoDBTestCase):
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"""Unit Tests for the LocalDisk storage driver."""
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def setUp(self):
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super(TestImageCache, self).setUp()
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self.mock_vg = mock.MagicMock(virtual_disks=[])
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# Initialize the ImageManager
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self.adpt = mock.MagicMock()
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self.vg_uuid = 'vg_uuid'
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self.vios_uuid = 'vios_uuid'
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self.img_cache = imagecache.ImageManager(self.vios_uuid, self.vg_uuid,
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self.adpt)
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# Setup virtual_disks to be used later
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self.inst1 = pvm_stor.VDisk.bld(None, 'b_inst1', 10)
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self.inst2 = pvm_stor.VDisk.bld(None, 'b_inst2', 10)
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self.image = pvm_stor.VDisk.bld(None, 'i_bf8446e4_4f52', 10)
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def test_get_base(self):
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self.mock_vg_get = self.useFixture(fixtures.MockPatch(
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'pypowervm.wrappers.storage.VG.get')).mock
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self.mock_vg_get.return_value = self.mock_vg
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vg_wrap = self.img_cache._get_base()
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self.assertEqual(vg_wrap, self.mock_vg)
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self.mock_vg_get.assert_called_once_with(
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self.adpt, uuid=self.vg_uuid,
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parent_type=pvm_vios.VIOS.schema_type, parent_uuid=self.vios_uuid)
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def test_scan_base_image(self):
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# No cached images
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self.mock_vg.virtual_disks = [self.inst1, self.inst2]
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base_images = self.img_cache._scan_base_image(self.mock_vg)
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self.assertEqual([], base_images)
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# One 'cached' image
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self.mock_vg.virtual_disks.append(self.image)
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base_images = self.img_cache._scan_base_image(self.mock_vg)
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self.assertEqual([self.image], base_images)
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@mock.patch('pypowervm.tasks.storage.rm_vg_storage')
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@mock.patch('nova.virt.imagecache.ImageCacheManager.'
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'_list_running_instances')
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@mock.patch('nova_powervm.virt.powervm.disk.imagecache.ImageManager.'
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'_scan_base_image')
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def test_age_and_verify(self, mock_scan, mock_list, mock_rm):
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mock_context = mock.MagicMock()
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all_inst = mock.MagicMock()
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mock_scan.return_value = [self.image]
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# Two instances backed by image 'bf8446e4_4f52'
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# Mock dict returned from _list_running_instances
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used_images = {'': [self.inst1, self.inst2],
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'bf8446e4_4f52': [self.inst1, self.inst2]}
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mock_list.return_value = {'used_images': used_images}
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self.mock_vg.virtual_disks = [self.inst1, self.inst2, self.image]
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self.img_cache._age_and_verify_cached_images(mock_context, all_inst,
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self.mock_vg)
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mock_rm.assert_not_called()
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mock_scan.assert_called_once_with(self.mock_vg)
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mock_rm.reset_mock()
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# No instances
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mock_list.return_value = {'used_images': {}}
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self.img_cache._age_and_verify_cached_images(mock_context, all_inst,
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self.mock_vg)
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mock_rm.assert_called_once_with(self.mock_vg, vdisks=[self.image])
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@mock.patch('nova_powervm.virt.powervm.disk.imagecache.ImageManager.'
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'_get_base')
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@mock.patch('nova_powervm.virt.powervm.disk.imagecache.ImageManager.'
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'_age_and_verify_cached_images')
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def test_update(self, mock_age, mock_base):
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mock_base.return_value = self.mock_vg
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mock_context = mock.MagicMock()
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mock_all_inst = mock.MagicMock()
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self.img_cache.update(mock_context, mock_all_inst)
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mock_base.assert_called_once_with()
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mock_age.assert_called_once_with(mock_context, mock_all_inst,
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self.mock_vg)
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