Fixture¶

data path fixture¶

import pytest
from pathlib import Path

DATA_PATH = Path(__file__).absolute().parent.joinpath('data')

@pytest.fixture
def data_path():
    return DATA_PATH

def test_data_path(data_path: Path):
    ...

call fixture function directly¶

solution: https://github.com/pytest-dev/pytest/issues/3950

• bad - default argument: this makes the fixture run at import time, not at test runtime

  def data():
      ...
  def test_my_func(data=data()):
      ...
  

• extract fixture

    def _data():
        ...
    @pytest.fixture
    def data():
      return _data()
  

• manual wrapping

  def _data():
      ...
  data = pytest.fixture(_data) # attach fixture to pytest
  

• direct invocation: @pytest.fixture keeps the original function in .__wrapped__

  if __name__ == '__main__':
      test_my_func(data=data.__wrapped__())