100 lines
3.6 KiB
Python
100 lines
3.6 KiB
Python
# Copyright 2011 OpenStack Foundation
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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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"""
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Tests For Chance Scheduler.
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"""
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import mock
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from nova import exception
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from nova import objects
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from nova.scheduler import chance
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from nova.tests.unit.scheduler import test_scheduler
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from nova.tests import uuidsentinel as uuids
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class ChanceSchedulerTestCase(test_scheduler.SchedulerTestCase):
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"""Test case for Chance Scheduler."""
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driver_cls = chance.ChanceScheduler
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def test_filter_hosts_avoid(self):
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"""Test to make sure _filter_hosts() filters original hosts if
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avoid_original_host is True.
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"""
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hosts = ['host1', 'host2', 'host3']
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spec_obj = objects.RequestSpec(ignore_hosts=['host2'])
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filtered = self.driver._filter_hosts(hosts, spec_obj=spec_obj)
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self.assertEqual(filtered, ['host1', 'host3'])
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def test_filter_hosts_no_avoid(self):
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"""Test to make sure _filter_hosts() does not filter original
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hosts if avoid_original_host is False.
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"""
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hosts = ['host1', 'host2', 'host3']
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spec_obj = objects.RequestSpec(ignore_hosts=[])
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filtered = self.driver._filter_hosts(hosts, spec_obj=spec_obj)
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self.assertEqual(filtered, hosts)
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@mock.patch('random.choice')
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def test_select_destinations(self, mock_random_choice):
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all_hosts = ['host1', 'host2', 'host3', 'host4']
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def _return_hosts(*args, **kwargs):
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return all_hosts
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mock_random_choice.side_effect = ['host3', 'host2']
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self.stub_out('nova.scheduler.chance.ChanceScheduler.hosts_up',
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_return_hosts)
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spec_obj = objects.RequestSpec(num_instances=2, ignore_hosts=None)
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dests = self.driver.select_destinations(self.context, spec_obj,
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[uuids.instance1, uuids.instance2], {},
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mock.sentinel.p_sums)
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self.assertEqual(2, len(dests))
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(host, node) = (dests[0].host, dests[0].nodename)
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self.assertEqual('host3', host)
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self.assertIsNone(node)
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(host, node) = (dests[1].host, dests[1].nodename)
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self.assertEqual('host2', host)
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self.assertIsNone(node)
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calls = [mock.call(all_hosts), mock.call(all_hosts)]
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self.assertEqual(calls, mock_random_choice.call_args_list)
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def test_select_destinations_no_valid_host(self):
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def _return_hosts(*args, **kwargs):
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return ['host1', 'host2']
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def _return_no_host(*args, **kwargs):
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return []
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self.stub_out('nova.scheduler.chance.ChanceScheduler.hosts_up',
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_return_hosts)
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self.stub_out('nova.scheduler.chance.ChanceScheduler._filter_hosts',
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_return_no_host)
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spec_obj = objects.RequestSpec(num_instances=1)
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spec_obj.instance_uuid = uuids.instance
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self.assertRaises(exception.NoValidHost,
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self.driver.select_destinations, self.context,
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spec_obj, [spec_obj.instance_uuid], {},
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mock.sentinel.p_sums)
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