python type_error ai_generated true

AssertionError: assert <Mock name='mock()' id='140735234567890'> == 5

ID: python/pytest-assert-repr-failure

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2025-11-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.8 active — — —
3.9 active — — —

Root Cause

A test is comparing a mock object to a value, likely because the mock was not set up to return a value, so it returns another mock by default.

generic

中文

测试将模拟对象与值进行比较，可能是因为模拟对象未设置返回值，因此默认返回另一个模拟对象。

Workarounds

  1. 95% success Set the mock's return_value to the expected integer value 
    mock = MagicMock(return_value=5)
result = mock()
assert result == 5
Or: mock.return_value = 5
  2. 85% success Ensure the code under test is calling the mock correctly 
    Debug to see if the mock is being called. If not, the test may be comparing the mock object itself instead of its return value.

Dead Ends

Common approaches that don't work:

  1. Comparing the mock to itself using `is` 70% fail

    This does not test the actual behavior; it only checks identity.

  2. Setting return_value to a string like '5' 50% fail

    This changes the type; the test expects an integer 5.