python runtime_error ai_generated true

assert 5 == 3 where 5 = func()

ID: python/pytest-assertion-rewrite-missing

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-03-12First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
7.x active — — —
8.x active — — —

Root Cause

pytest's assertion rewriting failed to produce detailed introspection because the test module was imported before the plugin registered, or the module is a plugin/entry-point not collected by pytest.

generic

中文

pytest 的断言重写未能生成详细的内部信息，因为测试模块在插件注册前被导入，或者该模块是未被 pytest 收集的插件/入口点。

Workarounds

  1. 90% success 
    Rename `checks.py` to `test_checks.py` and run `pytest test_checks.py -v`. Ensure no `conftest.py` imports the module early.
  2. 85% success 
    In `conftest.py`: `import pytest; pytest.register_assert_rewrite('myapp.tests.helpers')` then import helpers.

Dead Ends

Common approaches that don't work:

  1. 60% fail

    Manual messages still hide the intermediate values of subexpressions, defeating the purpose of assertion rewriting.

  2. 80% fail

    Disabling plugins also disables assertion rewriting from the built-in plugin, making output worse.