Python mock.foo函数代码示例

    def test_assert_has_calls(self):
        kalls1 = [call(1, 2), ({"a": 3},), ((3, 4),), call(b=6), ("", (1,), {"b": 6})]
        kalls2 = [call.foo(), call.bar(1)]
        kalls2.extend(call.spam().baz(a=3).call_list())
        kalls2.extend(call.bam(set(), foo={}).fish([1]).call_list())

        mocks = []
        for mock in Mock(), MagicMock():
            mock(1, 2)
            mock(a=3)
            mock(3, 4)
            mock(b=6)
            mock(1, b=6)
            mocks.append((mock, kalls1))

        mock = Mock()
        mock.foo()
        mock.bar(1)
        mock.spam().baz(a=3)
        mock.bam(set(), foo={}).fish([1])
        mocks.append((mock, kalls2))

        for mock, kalls in mocks:
            for i in range(len(kalls)):
                for step in 1, 2, 3:
                    these = kalls[i : i + step]
                    mock.assert_has_calls(these)

                    if len(these) > 1:
                        self.assertRaises(AssertionError, mock.assert_has_calls, list(reversed(these)))

    def test_arg_lists(self):
        mocks = [
            Mock(),
            MagicMock(),
            NonCallableMock(),
            NonCallableMagicMock()
        ]

        def assert_attrs(mock):
            names = 'call_args_list', 'method_calls', 'mock_calls'
            for name in names:
                attr = getattr(mock, name)
                self.assertIsInstance(attr, _CallList)
                self.assertIsInstance(attr, list)
                self.assertEqual(attr, [])

        for mock in mocks:
            assert_attrs(mock)

            if callable(mock):
                mock()
                mock(1, 2)
                mock(a=3)

                mock.reset_mock()
                assert_attrs(mock)

            mock.foo()
            mock.foo.bar(1, a=3)
            mock.foo(1).bar().baz(3)

            mock.reset_mock()
            assert_attrs(mock)

 def test_assert_called_with_failure_message(self):
     mock = NonCallableMock()
     expected = "mock(1, '2', 3, bar='foo')"
     message = 'Expected call: %s\nNot called'
     self.assertRaisesWithMsg(AssertionError, message % (expected,), mock.assert_called_with, 1, '2', 3, bar='foo')
     mock.foo(1, '2', 3, foo='foo')
     asserters = [mock.foo.assert_called_with, mock.foo.assert_called_once_with]
     for meth in asserters:
         actual = "foo(1, '2', 3, foo='foo')"
         expected = "foo(1, '2', 3, bar='foo')"
         message = 'Expected call: %s\nActual call: %s'
         self.assertRaisesWithMsg(AssertionError, message % (expected, actual), meth, 1, '2', 3, bar='foo')
     for meth in asserters:
         actual = "foo(1, '2', 3, foo='foo')"
         expected = "foo(bar='foo')"
         message = 'Expected call: %s\nActual call: %s'
         self.assertRaisesWithMsg(AssertionError, message % (expected, actual), meth, bar='foo')
     for meth in asserters:
         actual = "foo(1, '2', 3, foo='foo')"
         expected = 'foo(1, 2, 3)'
         message = 'Expected call: %s\nActual call: %s'
         self.assertRaisesWithMsg(AssertionError, message % (expected, actual), meth, 1, 2, 3)
     for meth in asserters:
         actual = "foo(1, '2', 3, foo='foo')"
         expected = 'foo()'
         message = 'Expected call: %s\nActual call: %s'
         self.assertRaisesWithMsg(AssertionError, message % (expected, actual), meth)

 def test_repr(self):
     mock = Mock(name='foo')
     self.assertIn('foo', repr(mock))
     self.assertIn("'%s'" % id(mock), repr(mock))
     mocks = [(Mock(), 'mock'), (Mock(name='bar'), 'bar')]
     for (mock, name) in mocks:
         self.assertIn('%s.bar' % name, repr(mock.bar))
         self.assertIn('%s.foo()' % name, repr(mock.foo()))
         self.assertIn('%s.foo().bing' % name, repr(mock.foo().bing))
         self.assertIn('%s()' % name, repr(mock()))
         self.assertIn('%s()()' % name, repr(mock()()))
         self.assertIn('%s()().foo.bar.baz().bing' % name, repr(mock()().foo.bar.baz().bing))

    def test_repr(self):
        mock = Mock(name="foo")
        self.assertIn("foo", repr(mock))
        self.assertIn("'%s'" % id(mock), repr(mock))

        mocks = [(Mock(), "mock"), (Mock(name="bar"), "bar")]
        for mock, name in mocks:
            self.assertIn("%s.bar" % name, repr(mock.bar))
            self.assertIn("%s.foo()" % name, repr(mock.foo()))
            self.assertIn("%s.foo().bing" % name, repr(mock.foo().bing))
            self.assertIn("%s()" % name, repr(mock()))
            self.assertIn("%s()()" % name, repr(mock()()))
            self.assertIn("%s()().foo.bar.baz().bing" % name, repr(mock()().foo.bar.baz().bing))

 def test_mock_calls(self):
     mock = MagicMock()
     self.assertIs(mock.mock_calls == [], True)
     mock = MagicMock()
     mock()
     expected = [('', (), {})]
     self.assertEqual(mock.mock_calls, expected)
     mock.foo()
     expected.append(call.foo())
     self.assertEqual(mock.mock_calls, expected)
     self.assertEqual(mock.foo.mock_calls, [('', (), {})])
     mock = MagicMock()
     mock().foo(1, 2, 3, a=4, b=5)
     expected = [('', (), {}), ('().foo', (1, 2, 3), dict(a=4, b=5))]
     self.assertEqual(mock.mock_calls, expected)
     self.assertEqual(mock.return_value.foo.mock_calls, [('', (1, 2, 3), dict(a=4, b=5))])
     self.assertEqual(mock.return_value.mock_calls, [('foo', (1, 2, 3), dict(a=4, b=5))])
     mock = MagicMock()
     mock().foo.bar().baz()
     expected = [('', (), {}), ('().foo.bar', (), {}), ('().foo.bar().baz', (), {})]
     self.assertEqual(mock.mock_calls, expected)
     self.assertEqual(mock().mock_calls, call.foo.bar().baz().call_list())
     for kwargs in (dict(), dict(name='bar')):
         mock = MagicMock(**kwargs)
         int(mock.foo)
         expected = [('foo.__int__', (), {})]
         self.assertEqual(mock.mock_calls, expected)
         mock = MagicMock(**kwargs)
         mock.a()()
         expected = [('a', (), {}), ('a()', (), {})]
         self.assertEqual(mock.mock_calls, expected)
         self.assertEqual(mock.a().mock_calls, [call()])
         mock = MagicMock(**kwargs)
         mock(1)(2)(3)
         self.assertEqual(mock.mock_calls, call(1)(2)(3).call_list())
         self.assertEqual(mock().mock_calls, call(2)(3).call_list())
         self.assertEqual(mock()().mock_calls, call(3).call_list())
         mock = MagicMock(**kwargs)
         mock(1)(2)(3).a.b.c(4)
         self.assertEqual(mock.mock_calls, call(1)(2)(3).a.b.c(4).call_list())
         self.assertEqual(mock().mock_calls, call(2)(3).a.b.c(4).call_list())
         self.assertEqual(mock()().mock_calls, call(3).a.b.c(4).call_list())
         mock = MagicMock(**kwargs)
         int(mock().foo.bar().baz())
         last_call = ('().foo.bar().baz().__int__', (), {})
         self.assertEqual(mock.mock_calls[-1], last_call)
         self.assertEqual(mock().mock_calls, call.foo.bar().baz().__int__().call_list())
         self.assertEqual(mock().foo.bar().mock_calls, call.baz().__int__().call_list())
         self.assertEqual(mock().foo.bar().baz.mock_calls, call().__int__().call_list())

 def test_adding_child_mock(self):
     for Klass in (NonCallableMock, Mock, MagicMock, NonCallableMagicMock):
         mock = Klass()
         mock.foo = Mock()
         mock.foo()
         self.assertEqual(mock.method_calls, [call.foo()])
         self.assertEqual(mock.mock_calls, [call.foo()])
         mock = Klass()
         mock.bar = Mock(name='name')
         mock.bar()
         self.assertEqual(mock.method_calls, [])
         self.assertEqual(mock.mock_calls, [])
         mock = Klass()
         mock.baz = MagicMock()()
         mock.baz()
         self.assertEqual(mock.method_calls, [])
         self.assertEqual(mock.mock_calls, [])

    def test_adding_child_mock(self):
        for Klass in NonCallableMock, Mock, MagicMock, NonCallableMagicMock:
            mock = Klass()

            mock.foo = Mock()
            mock.foo()

            self.assertEqual(mock.method_calls, [call.foo()])
            self.assertEqual(mock.mock_calls, [call.foo()])

            mock = Klass()
            mock.bar = Mock(name='name')
            mock.bar()
            self.assertEqual(mock.method_calls, [])
            self.assertEqual(mock.mock_calls, [])

            # mock with an existing _new_parent but no name
            mock = Klass()
            mock.baz = MagicMock()()
            mock.baz()
            self.assertEqual(mock.method_calls, [])
            self.assertEqual(mock.mock_calls, [])

    def test_assert_called_with_failure_message(self):
        mock = NonCallableMock()

        expected = "mock(1, '2', 3, bar='foo')"
        message = "Expected call: %s\nNot called"
        self.assertRaisesWithMsg(AssertionError, message % (expected,), mock.assert_called_with, 1, "2", 3, bar="foo")

        mock.foo(1, "2", 3, foo="foo")

        asserters = [mock.foo.assert_called_with, mock.foo.assert_called_once_with]
        for meth in asserters:
            actual = "foo(1, '2', 3, foo='foo')"
            expected = "foo(1, '2', 3, bar='foo')"
            message = "Expected call: %s\nActual call: %s"
            self.assertRaisesWithMsg(AssertionError, message % (expected, actual), meth, 1, "2", 3, bar="foo")

        # just kwargs
        for meth in asserters:
            actual = "foo(1, '2', 3, foo='foo')"
            expected = "foo(bar='foo')"
            message = "Expected call: %s\nActual call: %s"
            self.assertRaisesWithMsg(AssertionError, message % (expected, actual), meth, bar="foo")

        # just args
        for meth in asserters:
            actual = "foo(1, '2', 3, foo='foo')"
            expected = "foo(1, 2, 3)"
            message = "Expected call: %s\nActual call: %s"
            self.assertRaisesWithMsg(AssertionError, message % (expected, actual), meth, 1, 2, 3)

        # empty
        for meth in asserters:
            actual = "foo(1, '2', 3, foo='foo')"
            expected = "foo()"
            message = "Expected call: %s\nActual call: %s"
            self.assertRaisesWithMsg(AssertionError, message % (expected, actual), meth)

    def test_mock_calls(self):
        mock = MagicMock()

        # need to do this because MagicMock.mock_calls used to just return
        # a MagicMock which also returned a MagicMock when __eq__ was called
        self.assertIs(mock.mock_calls == [], True)

        mock = MagicMock()
        mock()
        expected = [('', (), {})]
        self.assertEqual(mock.mock_calls, expected)

        mock.foo()
        expected.append(call.foo())
        self.assertEqual(mock.mock_calls, expected)
        # intermediate mock_calls work too
        self.assertEqual(mock.foo.mock_calls, [('', (), {})])

        mock = MagicMock()
        mock().foo(1, 2, 3, a=4, b=5)
        expected = [
            ('', (), {}), ('().foo', (1, 2, 3), dict(a=4, b=5))
        ]
        self.assertEqual(mock.mock_calls, expected)
        self.assertEqual(mock.return_value.foo.mock_calls,
                         [('', (1, 2, 3), dict(a=4, b=5))])
        self.assertEqual(mock.return_value.mock_calls,
                         [('foo', (1, 2, 3), dict(a=4, b=5))])

        mock = MagicMock()
        mock().foo.bar().baz()
        expected = [
            ('', (), {}), ('().foo.bar', (), {}),
            ('().foo.bar().baz', (), {})
        ]
        self.assertEqual(mock.mock_calls, expected)
        self.assertEqual(mock().mock_calls,
                         call.foo.bar().baz().call_list())

        for kwargs in dict(), dict(name='bar'):
            mock = MagicMock(**kwargs)
            int(mock.foo)
            expected = [('foo.__int__', (), {})]
            self.assertEqual(mock.mock_calls, expected)

            mock = MagicMock(**kwargs)
            mock.a()()
            expected = [('a', (), {}), ('a()', (), {})]
            self.assertEqual(mock.mock_calls, expected)
            self.assertEqual(mock.a().mock_calls, [call()])

            mock = MagicMock(**kwargs)
            mock(1)(2)(3)
            self.assertEqual(mock.mock_calls, call(1)(2)(3).call_list())
            self.assertEqual(mock().mock_calls, call(2)(3).call_list())
            self.assertEqual(mock()().mock_calls, call(3).call_list())

            mock = MagicMock(**kwargs)
            mock(1)(2)(3).a.b.c(4)
            self.assertEqual(mock.mock_calls,
                             call(1)(2)(3).a.b.c(4).call_list())
            self.assertEqual(mock().mock_calls,
                             call(2)(3).a.b.c(4).call_list())
            self.assertEqual(mock()().mock_calls,
                             call(3).a.b.c(4).call_list())

            mock = MagicMock(**kwargs)
            int(mock().foo.bar().baz())
            last_call = ('().foo.bar().baz().__int__', (), {})
            self.assertEqual(mock.mock_calls[-1], last_call)
            self.assertEqual(mock().mock_calls,
                             call.foo.bar().baz().__int__().call_list())
            self.assertEqual(mock().foo.bar().mock_calls,
                             call.baz().__int__().call_list())
            self.assertEqual(mock().foo.bar().baz.mock_calls,
                             call().__int__().call_list())

# programme ...).
# Pour cela il y a les mock : 
"""Un objet mock, c’est un objet basé sur le null object pattern qui sert à 
faire semblant. Quand on l’instancie avec n’importe quoi, ça marche, quand on 
appelle n’importe quelle méthode, ça marche et ça renvoie un mock"""
import unittest.mock

# Un objet mock peut être appeler comme une classe ou une fonction
# et retouren toujours un mock. Il est possible d'appeler n'importe quel
# méthode et retournera toujors un mock
from unittest.mock import MagicMock # ou from mock import MagicMock
mock = MagicMock()
print(mock)
print(mock())
print(mock(1, True, [Exception, {}]))
print(mock.foo())
print(mock.nimporte().nawak().je().te().dis())
print(mock + mock - 10000)

# Il est possible de faire en sorte qu'ils aient un comportement spécifique.
mock.you = MagicMock(side_effect=ValueError('mofo !')) # un callable marche aussi
#mock.you() # Provoque une ValueError
mock.mock = MagicMock(return_value="moooooooooock")
print(mock.mock())

# Il est possible de combiner de vrai objets avec des mock

class maClasse:
    def func1(self):
        print("coucou")
    def func2(self):