python data_error ai_generated true

FileNotFoundError: [Errno 2] No such file or directory: '/repo/tests/test_parser/input.csv'

ID: python/pytest-datadir-missing-file

Also available as: JSON · Markdown · 中文
80%Fix Rate
80%Confidence
0Evidence
2024-06-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
0.8 active — — —

Root Cause

pytest-datadir resolves `data/` relative to the test module's directory; the file lives in the wrong path, the plugin is not installed, or the test file was moved without moving its data directory.

generic

中文

pytest-datadir 将 `data/` 解析为相对于测试模块的目录；文件路径错误、插件未安装，或测试文件移动时未一并移动数据目录。

Workarounds

  1. 90% success 
    Place data next to the test as `tests/test_parser/input.csv` and reference it via the `datadir` fixture:
def test_parse(datadir):
    path = datadir / 'input.csv'
    assert path.exists()
  2. 85% success 
    Or use `tmp_path` + `shutil.copy` from a committed fixtures dir:
import shutil
FIXTURES = Path(__file__).parent / 'fixtures'
def test_parse(tmp_path):
    src = FIXTURES / 'input.csv'
    dst = tmp_path / 'input.csv'
    shutil.copy(src, dst)

Dead Ends

Common approaches that don't work:

  1. 90% fail

    Breaks on CI and other machines; path does not exist there.

  2. 75% fail

    Silently produces empty fixtures and the test asserts against wrong data.