Pytest Fixture - autouse fixtures (using yield)

Using the @pytest.fixture decorator we can designate some function to be called automatically before and/or after each test.

If we set the scope to module then the fixtures will be similar to the setup_module, teardown_module functions of the xUnit style.

If we set thescope to function then the fixtures will be similar to the setup_function, teardown_function functions of the xUnit style.

import pytest
import time

@pytest.fixture(autouse = True, scope="module")
def fix_module():
    answer = 42
    print(f"Module setup {answer}")
    yield
    print(f"Module teardown {answer}")


@pytest.fixture(autouse = True, scope="function")
def fix_function():
    start = time.time()
    print(f"  Function setup {start}")
    yield
    print(f"  Function teardown {start}")


def test_one():
    print("    Test one")
    assert True
    print("    Test one - 2nd part")

def test_two():
    print("    Test two")
    assert False
    print("    Test two - 2nd part")

Output:

Module setup 42
  Function setup 1612427609.9726396
    Test one
    Test one - 2nd part
  Function teardown 1612427609.9726396
  Function setup 1612427609.9741583
    Test two
  Function teardown 1612427609.9741583
Module teardown 42