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# Copyright 2017 Cloudbase Solutions Srl
# All Rights Reserved.
#
# 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 testtools
from unittest import mock
from oslotest import mock_fixture
# NOTE(claudiub): this needs to be called before any mock.patch calls are
# being done, and especially before the test class loads. This fixes
# the mock.patch autospec issue:
# https://github.com/testing-cabal/mock/issues/396
# TODO(claudiub): Remove this once the fix has been merged and released.
mock_fixture.patch_mock_module()
class Foo(object):
def bar(self, a, b, c, d=None):
pass
@classmethod
def classic_bar(cls, a, b, c, d=None):
pass
@staticmethod
def static_bar(a, b, c, d=None):
pass
class MockSanityTestCase(testtools.TestCase):
def setUp(self):
super(MockSanityTestCase, self).setUp()
self.useFixture(mock_fixture.MockAutospecFixture())
def _check_autospeced_foo(self, foo):
for method_name in ['bar', 'classic_bar', 'static_bar']:
mock_method = getattr(foo, method_name)
# check that the methods are callable with correct args.
mock_method(mock.sentinel.a, mock.sentinel.b, mock.sentinel.c)
mock_method(mock.sentinel.a, mock.sentinel.b, mock.sentinel.c,
d=mock.sentinel.d)
mock_method.assert_has_calls([
mock.call(mock.sentinel.a, mock.sentinel.b, mock.sentinel.c),
mock.call(mock.sentinel.a, mock.sentinel.b, mock.sentinel.c,
d=mock.sentinel.d)])
# assert that TypeError is raised if the method signature is not
# respected.
self.assertRaises(TypeError, mock_method)
self.assertRaises(TypeError, mock_method, mock.sentinel.a)
self.assertRaises(TypeError, mock_method, a=mock.sentinel.a)
self.assertRaises(TypeError, mock_method, mock.sentinel.a,
mock.sentinel.b, mock.sentinel.c,
e=mock.sentinel.e)
# assert that AttributeError is raised if the method does not exist.
self.assertRaises(AttributeError, getattr, foo, 'lish')
def _check_mock_autospec_all_members(self, mock_cls):
for spec in [Foo, Foo()]:
foo = mock_cls(autospec=spec)
self._check_autospeced_foo(foo)
self._check_autospeced_foo(foo())
def test_mock_autospec_all_members(self):
self._check_mock_autospec_all_members(mock.Mock)
def test_magic_mock_autospec_all_members(self):
self._check_mock_autospec_all_members(mock.MagicMock)
@mock.patch.object(Foo, 'static_bar')
@mock.patch.object(Foo, 'classic_bar')
@mock.patch.object(Foo, 'bar')
def test_patch_autospec_class(self, mock_meth, mock_cmeth, mock_smeth):
foo = Foo()
self._check_autospeced_foo(foo)
def test_patch_autospec_multiple(self):
with mock.patch.multiple(Foo, bar=mock.DEFAULT,
classic_bar=mock.DEFAULT,
static_bar=mock.DEFAULT):
foo = Foo()
self._check_autospeced_foo(foo)
@mock.patch.object(Foo, 'static_bar', autospec=False)
@mock.patch.object(Foo, 'classic_bar', autospec=False)
@mock.patch.object(Foo, 'bar', autospec=False)
def test_patch_autospec_class_false(self, mock_meth, mock_cmeth,
mock_smeth):
foo = Foo()
# we're checking that method signature is not enforced.
foo.bar()
mock_meth.assert_called_once_with()
foo.classic_bar()
mock_cmeth.assert_called_once_with()
foo.static_bar()
mock_smeth.assert_called_once_with()
@mock.patch.object(Foo, 'lish', create=True)
def test_patch_create(self, mock_lish):
foo = Foo()
foo.lish()
mock_lish.assert_called_once_with()
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