1

假设我有以下功能：

def function_to_test(context):
    list_of_invocations = [ func('arg%s' % number) for number in [1,2]]
    email_one = list_of_invocations[0].render(context)
    email_two = list_of_invocations[1].render(context)
    instance = class_to_mock(email_one, arg_1, arg_2)  
    instance.method_for_class(email_two, 'text/html')
    instance.send()

@mock.patch('app.foo.class_to_mock')
@mock.patch('app.foo.func')
def test_render_and_send_email(self, func_mock, mock_to_class):
    render_method = mock.Mock()
    render_method.return_value = mock.Mock()

    class_method = mock.Mock()
    class_method.return_value = mock.Mock()

    func_mock.return_value = mock.MagicMock(render=render_method)
    mock_to_class.return_value = mock.Magic(method_for_class=class_method)
    function_to_test('context goes heres')
    self.assertEqual(func_mock.call_count, 2)
    self.assertEqual(render_method.call_count, 2)
    self.assertEqual(mock_to_class.call_count, 1)
    self.assertEqual(method_class.call_count,1)

我正在尝试使用模拟测试此功能，但我无法决定如何测试它。想到的两个选项是使用side_effector assert_has_calls。这是我正在尝试做的事情的总结。

  • 我想确保它func被调用了两次。（完毕）
  • 我想为每个 func调用创建一个模拟（未完成）
  • 我想确保渲染被调用两次。（完毕）
  • 我想确保class_to_mock调用email_one 它是我需要模拟的email_oneand email_two。（尚未完成）

测试将是这样的

`mock_to_class.assert_called_once_with(*MOCK EMAIL ONE*,'one', 'two')`

  • 我希望'''method_for_class'''看起来像这样（未完成）：

    class_method.assert_called_once_with(*MOCK EMAIL TWO*, 'text/html')

希望这是有道理的。基本上，我需要两个不同的调用func来确保class_to_mock和中有参数method_for_class。

4

1 回答 1

2

您可以使用以下new属性@patch.object：

email_one=Mock()
email_two=Mock()

func_call_count = 0
def my_func_mock():
    global func_call_count
    func_call_count += 1

    if func_call_count == 1:
        do_invocation_1()

    if func_call_count == 2:
        do_invocation_2()

def do_invocation_1():
    return [email_one, email_two]

def do_invocation_2():
    return [email_one, email_two]

@mock.patch('app.foo.class_to_mock')
@mock.patch('app.foo.func', new=my_func_mock)
def test_render_and_send_email(self, func_mock, mock_to_class):
    render_method = mock.Mock()
    render_method.return_value = mock.Mock()

    class_method = mock.Mock()
    class_method.return_value = mock.Mock()

    func_mock.return_value = mock.MagicMock(render=render_method)
    mock_to_class.return_value = mock.Magic(method_for_class=class_method)
    function_to_test('context goes heres')
    self.assertEqual(func_call_count, 2) # Use the func_call_count instead
    self.assertEqual(render_method.call_count, 2)
    mock_to_class.assert_called_once_With(email_one, email_two) # Now you can assert it is called once with email_one & two
    self.assertEqual(method_class.call_count,1)
于 2016-01-13T22:30:24.727 回答