Question

我的测试如下：

FCK.CreateLink=function(A){FCK.ExecuteNamedCommand('Unlink');if (A.length>0){var B='javascript:void(0);/*'+(new Date().getTime())+'*/';FCK.ExecuteNamedCommand('CreateLink',B);var C=this.EditorDocument.evaluate("//a[@href='"+B+"']",this.EditorDocument.body,null,9,null).singleNodeValue;if (C){C.href=A;return C;}}};

我收到以下错误：

TypeError：test_file_open_and_read（）只需要3个参数（给定2个）

我正在尝试指定我希望使用import mock # other test code, test suite class declaration here @mock.patch("other_file.another_method") @mock.patch("other_file.open", new=mock.mock_open(read=["First line", "Second line"]) def test_file_open_and_read(self, mock_open_method, mock_another_method): self.assertTrue(True) # Various assertions.而不是__builtin__.open来模拟其他文件的mock.mock_open方法，这是mock.MagicMock装饰器的默认行为。我怎么能这样做？

Answer 1

您错过了create内置的参数open。

@mock.patch("other_file.open", new=mock.mock_open(read=["First line", "Second line"], create=True)

Answer 2

应使用new_callable代替new。也就是说，

@mock.patch("other_file.open", new_callable=mock.mock_open)
def test_file_open_and_read(self, mock_open_method):
    # assert on the number of times open().write was called.
    self.assertEqual(mock_open_method().write.call_count,
                     num_write_was_called)

请注意，我们将函数句柄mock.mock_open传递给new_callable，而不是结果对象。这样我们就可以mock_open_method().write访问write函数，就像mock_open节目文档中的示例一样。

如何将mock_open与Python UnitTest装饰器一起使用？

2 个答案: