python runtime_error ai_generated true

AssertionError: setUpClass not called before test methods

ID: python/unittest-setupclass-not-called

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-08-30First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

The test class does not inherit from unittest.TestCase, or setUpClass is defined incorrectly (e.g., as an instance method).

generic

中文

测试类未继承 unittest.TestCase，或者 setUpClass 定义错误（例如，作为实例方法）。

Workarounds

  1. 99% success 
    class TestMyClass(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        ...
  2. 90% success 
    @pytest.fixture(scope='class')
def setup():
    ...

Dead Ends

Common approaches that don't work:

  1. 70% fail

    setUp is called for each test, not once for the class.

  2. 50% fail

    If the class doesn't inherit from TestCase, it won't be recognized.