fixture

Using a fixture and a parameter at the same time

# content of test_fixture_exp01.py

import pytest


@pytest.fixture
def a():
    return 3


@pytest.mark.parametrize("x", [3, 4])
def test_f(a, x):
    assert a == x

$ pytest fixture_exp01.py
============================= test session starts ==============================
platform darwin -- Python 3.7.6, pytest-5.3.5, py-1.8.1, pluggy-0.13.1
rootdir: /Users/user/work/
plugins: hypothesis-5.5.4, arraydiff-0.3, remotedata-0.3.2, openfiles-0.4.0, doctestplus-0.5.0, astropy-header-0.1.2
collected 2 items

test_fixture_exp01.py .F                                                 [100%]

=================================== FAILURES ===================================
__________________________________ test_f[4] ___________________________________

a = 3, x = 4

    @pytest.mark.parametrize("x", [3, 4])
    def test_f(a, x):
>       assert a == x
E       assert 3 == 4

test_fixture_exp01.py:13: AssertionError
========================= 1 failed, 1 passed in 0.02s ==========================