Python Testing with pytest

Combining Markers with Fixtures

Markers can be used in conjunction with fixtures. They also can be used in conjunction with plugins and hook functions (but that’s a topic for Chapter 15, ​Building Plugins​). Here, we’ll combine markers and fixtures to help test the Cards application.

The builtin markers took parameters, while the custom ones we’ve used so far do not. Let’s create a new marker called num_cards that we can pass to the cards_db fixture.

The cards_db fixture currently cleans out the database for each test that wants to use it:

ch6/combined/test_three_cards.py

@pytest.fixture(scope="function")
def cards_db(session_cards_db):
    db = session_cards_db
    db.delete_all()
    return db

If we want to, say, have three cards in the ...