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Add test coverage for OSError handling in get_user() for Python 3.13+ compatibility #13836

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Add test coverage for OSError handling in get_user() for Python 3.13+ compatibility #13836

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669e259
Initial plan
Copilot Oct 21, 2025
9fae572
Add test for OSError handling in get_user()
Copilot Oct 21, 2025
a5c2118
Fix test to skip on non-Windows and use direct env var removal
Copilot Oct 21, 2025
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16 changes: 16 additions & 0 deletions testing/test_tmpdir.py
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Original file line number Diff line number Diff line change
Expand Up @@ -367,6 +367,22 @@ def test_get_user(monkeypatch):
assert get_user() is None


def test_get_user_handles_oserror(monkeypatch):
"""Test that get_user() returns None when getpass.getuser() raises OSError.

This handles the Python 3.13+ behavior where getpass.getuser() raises
OSError when no username environment variables (LOGNAME, USER, LNAME,
USERNAME) are set on Windows (#11874).
"""
import getpass

def mock_getuser():
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@RonnyPfannschmidt RonnyPfannschmidt Oct 21, 2025

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@copilot this tests the wrong thing

The test shoul skip on non affected platforms and use direct values
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Copilot AI Oct 21, 2025

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Updated in commit 9c8e8d8. The test now:

  • Skips on non-Windows platforms using @pytest.mark.skipif(not sys.platform.startswith("win"), reason="win only")
  • Uses direct environment variable removal with monkeypatch.delenv() for all four variables (LOGNAME, USER, LNAME, USERNAME) instead of mocking
raise OSError("No username set in the environment")

monkeypatch.setattr(getpass, "getuser", mock_getuser)
assert get_user() is None


class TestNumberedDir:
PREFIX = "fun-"

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