225 lines
7.8 KiB
Python
225 lines
7.8 KiB
Python
# Copyright 2013 Rackspace, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import collections
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from unittest import mock
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from stevedore import extension
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from ironic_python_agent import errors
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from ironic_python_agent import hardware
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from ironic_python_agent.tests.unit import base
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def counted(fn):
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def wrapper(self, *args, **kwargs):
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try:
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counts = self._call_counts
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except AttributeError:
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counts = self._call_counts = collections.Counter()
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counts[fn.__name__] += 1
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return fn(self, *args, **kwargs)
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return wrapper
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class FakeGenericHardwareManager(hardware.HardwareManager):
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@counted
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def generic_only(self):
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return 'generic_only'
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@counted
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def generic_none(self):
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return None
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@counted
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def specific_none(self):
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return 'generic'
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@counted
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def return_list(self):
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return ['generic']
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@counted
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def specific_only(self):
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raise Exception("Test fail: This method should not be called")
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@counted
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def mainline_fail(self):
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return 'generic_mainline_fail'
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@counted
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def both_succeed(self):
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return 'generic_both'
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@counted
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def unexpected_fail(self):
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raise Exception("Test fail: This method should not be called")
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@counted
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def evaluate_hardware_support(self):
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return hardware.HardwareSupport.GENERIC
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class FakeMainlineHardwareManager(hardware.HardwareManager):
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@counted
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def specific_only(self):
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return 'specific_only'
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@counted
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def generic_none(self):
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return 'specific'
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@counted
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def specific_none(self):
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return None
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@counted
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def return_list(self):
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return ['specific']
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@counted
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def mainline_fail(self):
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raise errors.IncompatibleHardwareMethodError
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@counted
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def both_succeed(self):
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return 'specific_both'
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@counted
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def unexpected_fail(self):
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raise RuntimeError('A problem was encountered')
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@counted
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def evaluate_hardware_support(self):
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return hardware.HardwareSupport.MAINLINE
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class TestMultipleHardwareManagerLoading(base.IronicAgentTest):
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def setUp(self):
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super(TestMultipleHardwareManagerLoading, self).setUp()
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fake_ep = mock.Mock()
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fake_ep.module_name = 'fake'
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fake_ep.attrs = ['fake attrs']
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self.generic_hwm = extension.Extension(
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'fake_generic', fake_ep, None, FakeGenericHardwareManager())
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self.mainline_hwm = extension.Extension(
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'fake_mainline', fake_ep, None, FakeMainlineHardwareManager())
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self.fake_ext_mgr = extension.ExtensionManager.make_test_instance(
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[self.generic_hwm, self.mainline_hwm])
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self.extension_mgr_patcher = mock.patch('stevedore.ExtensionManager',
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autospec=True)
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self.addCleanup(self.extension_mgr_patcher.stop)
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self.mocked_extension_mgr = self.extension_mgr_patcher.start()
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self.mocked_extension_mgr.return_value = self.fake_ext_mgr
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hardware._global_managers = None
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def test_mainline_method_only(self):
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hardware.dispatch_to_managers('specific_only')
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self.assertEqual(
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1, self.mainline_hwm.obj._call_counts['specific_only'])
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def test_generic_method_only(self):
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hardware.dispatch_to_managers('generic_only')
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self.assertEqual(1, self.generic_hwm.obj._call_counts['generic_only'])
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def test_both_succeed(self):
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# In the case where both managers will work; only the most specific
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# manager should have it's function called.
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hardware.dispatch_to_managers('both_succeed')
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self.assertEqual(1, self.mainline_hwm.obj._call_counts['both_succeed'])
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self.assertEqual(0, self.generic_hwm.obj._call_counts['both_succeed'])
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def test_mainline_fails(self):
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# Ensure that if the mainline manager is unable to run the method
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# that we properly fall back to generic.
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hardware.dispatch_to_managers('mainline_fail')
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self.assertEqual(
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1, self.mainline_hwm.obj._call_counts['mainline_fail'])
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self.assertEqual(1, self.generic_hwm.obj._call_counts['mainline_fail'])
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def test_manager_method_not_found(self):
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self.assertRaises(errors.HardwareManagerMethodNotFound,
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hardware.dispatch_to_managers,
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'fake_method')
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def test_method_fails(self):
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self.assertRaises(RuntimeError,
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hardware.dispatch_to_managers,
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'unexpected_fail')
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def test_dispatch_to_all_managers_mainline_only(self):
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results = hardware.dispatch_to_all_managers('generic_none')
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self.assertEqual(1, self.generic_hwm.obj._call_counts['generic_none'])
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self.assertEqual({'FakeGenericHardwareManager': None,
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'FakeMainlineHardwareManager': 'specific'},
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results)
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def test_dispatch_to_all_managers_generic_method_only(self):
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results = hardware.dispatch_to_all_managers('specific_none')
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self.assertEqual(1, self.generic_hwm.obj._call_counts['specific_none'])
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self.assertEqual({'FakeGenericHardwareManager': 'generic',
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'FakeMainlineHardwareManager': None}, results)
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def test_dispatch_to_all_managers_both_succeed(self):
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# In the case where both managers will work; only the most specific
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# manager should have it's function called.
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results = hardware.dispatch_to_all_managers('both_succeed')
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self.assertEqual({'FakeGenericHardwareManager': 'generic_both',
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'FakeMainlineHardwareManager': 'specific_both'},
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results)
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self.assertEqual(1, self.mainline_hwm.obj._call_counts['both_succeed'])
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self.assertEqual(1, self.generic_hwm.obj._call_counts['both_succeed'])
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def test_dispatch_to_all_managers_mainline_fails(self):
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# Ensure that if the mainline manager is unable to run the method
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# that we properly fall back to generic.
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hardware.dispatch_to_all_managers('mainline_fail')
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self.assertEqual(
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1, self.mainline_hwm.obj._call_counts['mainline_fail'])
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self.assertEqual(1, self.generic_hwm.obj._call_counts['mainline_fail'])
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def test_dispatch_to_all_managers_manager_method_not_found(self):
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self.assertRaises(errors.HardwareManagerMethodNotFound,
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hardware.dispatch_to_all_managers,
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'unknown_method')
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def test_dispatch_to_all_managers_method_fails(self):
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self.assertRaises(RuntimeError,
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hardware.dispatch_to_all_managers,
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'unexpected_fail')
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class TestNoHardwareManagerLoading(base.IronicAgentTest):
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def setUp(self):
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super(TestNoHardwareManagerLoading, self).setUp()
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self.empty_ext_mgr = extension.ExtensionManager.make_test_instance([])
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@mock.patch('stevedore.ExtensionManager', autospec=True)
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def test_no_managers_found(self, mocked_extension_mgr_constructor):
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mocked_extension_mgr_constructor.return_value = self.empty_ext_mgr
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hardware._global_managers = None
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self.assertRaises(errors.HardwareManagerNotFound,
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hardware.dispatch_to_managers,
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'some_method')
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