python runtime_error ai_generated true

AssertionError: 期望 'mock_method' 被调用一次。实际调用 0 次。

AssertionError: Expected 'mock_method' to have been called once. Called 0 times.

ID: python/pytest-mock-patch-not-applied

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80%修复率
87%置信度
0证据数
2024-07-05首次发现

版本兼容性

版本状态引入弃用备注
3.x active — — —

根因分析

mock 应用到了错误的命名空间，或被测代码直接导入函数，绕过了 patch。

English

The mock was applied to the wrong namespace or the code under test imports the function directly, bypassing the patch.

generic

解决方案

  1. 95% 成功率 
    If my_module.py does 'from other_module import my_func', patch 'my_module.my_func' instead of 'other_module.my_func'.
  2. 90% 成功率 
    def test_my_func(monkeypatch):
    monkeypatch.setattr('my_module.my_func', lambda: None)
    # test code
  3. 85% 成功率 
    import my_module; print(my_module.my_func.__module__) to see where it's defined, then patch accordingly.

无效尝试

常见但无效的做法:

  1. 95% 失败

    The test then passes but does not verify the intended behavior; the mock is still not applied.

  2. 90% 失败

    If the target is incorrect, patch.object fails similarly.