3321b22ca8
The library packaged mock seems to work better across python versions, so instead of trying to mix the system one and the library one always prefer the library one (which should work in all supported python versions). Change-Id: Id6ada69df9961a6b7511316e2f75ef9ee5f0b72b
305 lines
10 KiB
Python
305 lines
10 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2012 Yahoo! Inc. 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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from __future__ import absolute_import
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import collections
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import logging
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import fixtures
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import mock
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from oslotest import base
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from oslotest import mockpatch
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import six
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from testtools import compat
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from testtools import matchers
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from testtools import testcase
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from taskflow import exceptions
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from taskflow.tests import utils
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from taskflow.utils import misc
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class GreaterThanEqual(object):
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"""Matches if the item is geq than the matchers reference object."""
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def __init__(self, source):
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self.source = source
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def match(self, other):
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if other >= self.source:
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return None
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return matchers.Mismatch("%s was not >= %s" % (other, self.source))
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class FailureRegexpMatcher(object):
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"""Matches if the failure was caused by the given exception and message.
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This will match if a given failure contains and exception of the given
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class type and if its string message matches to the given regular
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expression pattern.
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"""
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def __init__(self, exc_class, pattern):
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self.exc_class = exc_class
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self.pattern = pattern
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def match(self, failure):
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for cause in failure:
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if cause.check(self.exc_class) is not None:
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return matchers.MatchesRegex(
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self.pattern).match(cause.exception_str)
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return matchers.Mismatch("The `%s` wasn't caused by the `%s`" %
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(failure, self.exc_class))
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class ItemsEqual(object):
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"""Matches the items in two sequences.
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This matcher will validate that the provided sequence has the same elements
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as a reference sequence, regardless of the order.
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"""
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def __init__(self, seq):
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self._seq = seq
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self._list = list(seq)
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def match(self, other):
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other_list = list(other)
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extra = misc.sequence_minus(other_list, self._list)
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missing = misc.sequence_minus(self._list, other_list)
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if extra or missing:
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msg = ("Sequences %s and %s do not have same items."
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% (self._seq, other))
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if missing:
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msg += " Extra items in first sequence: %s." % missing
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if extra:
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msg += " Extra items in second sequence: %s." % extra
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return matchers.Mismatch(msg)
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return None
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class TestCase(base.BaseTestCase):
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"""Test case base class for all taskflow unit tests."""
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def makeTmpDir(self):
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t_dir = self.useFixture(fixtures.TempDir())
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return t_dir.path
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def assertDictEqual(self, expected, check):
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self.assertIsInstance(expected, dict,
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'First argument is not a dictionary')
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self.assertIsInstance(check, dict,
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'Second argument is not a dictionary')
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# Testtools seems to want equals objects instead of just keys?
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compare_dict = {}
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for k in list(six.iterkeys(expected)):
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if not isinstance(expected[k], matchers.Equals):
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compare_dict[k] = matchers.Equals(expected[k])
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else:
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compare_dict[k] = expected[k]
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self.assertThat(matchee=check,
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matcher=matchers.MatchesDict(compare_dict))
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def assertRaisesAttrAccess(self, exc_class, obj, attr_name):
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def access_func():
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getattr(obj, attr_name)
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self.assertRaises(exc_class, access_func)
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def assertRaisesRegexp(self, exc_class, pattern, callable_obj,
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*args, **kwargs):
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# TODO(harlowja): submit a pull/review request to testtools to add
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# this method to there codebase instead of having it exist in ours
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# since it really doesn't belong here.
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class ReRaiseOtherTypes(object):
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def match(self, matchee):
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if not issubclass(matchee[0], exc_class):
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compat.reraise(*matchee)
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class CaptureMatchee(object):
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def match(self, matchee):
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self.matchee = matchee[1]
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capture = CaptureMatchee()
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matcher = matchers.Raises(matchers.MatchesAll(ReRaiseOtherTypes(),
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matchers.MatchesException(exc_class,
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pattern),
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capture))
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our_callable = testcase.Nullary(callable_obj, *args, **kwargs)
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self.assertThat(our_callable, matcher)
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return capture.matchee
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def assertGreater(self, first, second):
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matcher = matchers.GreaterThan(first)
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self.assertThat(second, matcher)
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def assertGreaterEqual(self, first, second):
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matcher = GreaterThanEqual(first)
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self.assertThat(second, matcher)
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def assertRegexpMatches(self, text, pattern):
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matcher = matchers.MatchesRegex(pattern)
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self.assertThat(text, matcher)
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def assertIsSuperAndSubsequence(self, super_seq, sub_seq, msg=None):
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super_seq = list(super_seq)
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sub_seq = list(sub_seq)
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current_tail = super_seq
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for sub_elem in sub_seq:
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try:
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super_index = current_tail.index(sub_elem)
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except ValueError:
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# element not found
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if msg is None:
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msg = ("%r is not subsequence of %r: "
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"element %r not found in tail %r"
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% (sub_seq, super_seq, sub_elem, current_tail))
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self.fail(msg)
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else:
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current_tail = current_tail[super_index + 1:]
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def assertFailuresRegexp(self, exc_class, pattern, callable_obj, *args,
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**kwargs):
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"""Asserts the callable failed with the given exception and message."""
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try:
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with utils.wrap_all_failures():
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callable_obj(*args, **kwargs)
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except exceptions.WrappedFailure as e:
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self.assertThat(e, FailureRegexpMatcher(exc_class, pattern))
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def assertItemsEqual(self, seq1, seq2, msg=None):
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matcher = ItemsEqual(seq1)
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self.assertThat(seq2, matcher)
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class MockTestCase(TestCase):
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def setUp(self):
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super(MockTestCase, self).setUp()
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self.master_mock = mock.Mock(name='master_mock')
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def patch(self, target, autospec=True, **kwargs):
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"""Patch target and attach it to the master mock."""
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f = self.useFixture(mockpatch.Patch(target,
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autospec=autospec, **kwargs))
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mocked = f.mock
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attach_as = kwargs.pop('attach_as', None)
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if attach_as is not None:
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self.master_mock.attach_mock(mocked, attach_as)
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return mocked
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def patchClass(self, module, name, autospec=True, attach_as=None):
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"""Patches a modules class.
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This will create a class instance mock (using the provided name to
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find the class in the module) and attach a mock class the master mock
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to be cleaned up on test exit.
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"""
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if autospec:
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instance_mock = mock.Mock(spec_set=getattr(module, name))
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else:
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instance_mock = mock.Mock()
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f = self.useFixture(mockpatch.PatchObject(module, name,
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autospec=autospec))
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class_mock = f.mock
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class_mock.return_value = instance_mock
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if attach_as is None:
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attach_class_as = name
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attach_instance_as = name.lower()
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else:
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attach_class_as = attach_as + '_class'
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attach_instance_as = attach_as
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self.master_mock.attach_mock(class_mock, attach_class_as)
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self.master_mock.attach_mock(instance_mock, attach_instance_as)
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return class_mock, instance_mock
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def resetMasterMock(self):
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self.master_mock.reset_mock()
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class CapturingLoggingHandler(logging.Handler):
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"""A handler that saves record contents for post-test analysis."""
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def __init__(self, level=logging.DEBUG):
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# It seems needed to use the old style of base class calling, we
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# can remove this old style when we only support py3.x
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logging.Handler.__init__(self, level=level)
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self._records = []
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@property
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def counts(self):
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"""Returns a dictionary with the number of records at each level."""
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self.acquire()
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try:
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captured = collections.defaultdict(int)
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for r in self._records:
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captured[r.levelno] += 1
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return captured
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finally:
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self.release()
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@property
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def messages(self):
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"""Returns a dictionary with list of record messages at each level."""
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self.acquire()
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try:
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captured = collections.defaultdict(list)
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for r in self._records:
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captured[r.levelno].append(r.getMessage())
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return captured
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finally:
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self.release()
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@property
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def exc_infos(self):
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"""Returns a list of all the record exc_info tuples captured."""
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self.acquire()
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try:
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captured = []
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for r in self._records:
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if r.exc_info:
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captured.append(r.exc_info)
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return captured
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finally:
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self.release()
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def emit(self, record):
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self.acquire()
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try:
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self._records.append(record)
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finally:
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self.release()
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def reset(self):
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"""Resets *all* internally captured state."""
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self.acquire()
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try:
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self._records = []
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finally:
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self.release()
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def close(self):
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logging.Handler.close(self)
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self.reset()
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