python type_error ai_generated true

类型错误：使用 mock.assert_called_with 时 'NoneType' 对象不可调用

TypeError: 'NoneType' object is not callable when using mock.assert_called_with

ID: python/unittest-mock-assert-called-with-typeerror

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80%修复率

82%置信度

0证据数

2024-05-20首次发现

版本兼容性

版本	状态	引入	弃用	备注
3.9	active	—	—	—
3.10	active	—	—	—

模拟对象未正确配置，或在断言之前被非可调用值（例如 None）替换。

The mock object is not properly configured or is being replaced by a non-callable value (e.g., None) before the assertion is made.

generic

85% 成功率 Ensure the mock is created with 'autospec=True' to maintain callable signature.
```
mock = unittest.mock.MagicMock(autospec=True); mock.assert_called_with(args)
```
80% 成功率 Verify the mock is not overwritten by using patch with return_value set explicitly.
```
with unittest.mock.patch('module.function', return_value=mock_callable): ...
```

常见但无效的做法:

Adding more mock assertions without checking mock creation 90% 失败
The core issue is the mock object itself; additional assertions will fail similarly.
Using patch decorator incorrectly and assuming mock is automatically callable 75% 失败
If patch replaces the object with a non-callable, the mock will not be callable.