Making sense of pytest imports

pytest_imports.md

Organizing pytest tests

Python imports can get weird, specially when dealing with tests that are to be kept separate from the application code (i.e., in sibling directories).

This is how you organize your tests with pytest.

The code

Directory structure

pkg/
  code.py
tests/
  __init__.py
  test_code.py

File structure

# pkg/code.py
def f(x):
    return x+2

# tests/__init__.py
# (may be left empty)

# tests/test_code.py
from pkg.code import f


def test_f():
    assert f(2) == 4

The testing

Now you can run your tests with the pytest command 😊