Mocking with Pytest-mock articles

application1.py

# application1.py

from time import sleep


def is_windows():
    # This sleep could be some complex operation instead
    sleep(5)
    return True


def get_operating_system():
    return 'Windows' if is_windows() else 'Linux'
  

test_application1a.py

# test_application1a.py

from application1 import get_operating_system


def test_get_operating_system(mocker):
    mocker.patch('application1.is_windows', return_value=True)
    assert get_operating_system() == 'Windows'

test_application1b.py

# test_application1b.py

from application1 import get_operating_system


def test_get_operation_system_is_linux(mocker):
    mocker.patch('application1.is_windows', return_value=False)
    assert get_operating_system() == 'Linux'

Links to Medium articles:

1. https://medium.com/@durgaswaroop/mocking-in-python-with-pytest-mock-part-i-6203c8ad3606