How to parametrize fixture before some test?

Question

from pytest import fixture

@fixture
def env():
    return {"key1": "value1", "key2": "value2"}


def do_work(env):
    print("working")


def test_0(env):
    do_work(env)


def test_1(env):
    env["key1"] = "new_value1"

    do_work(env)


def test_2(env):
    env["key2"] = "new_value3"

    do_work(env)

In example I have test_1 and test_2 that do the same do_work, but before calling it edit fixture. How can I use parametrization (or anything else) to avoid writing two tests? I can't just use fixture parametrization as is because test_0 does not require parametrization.

Answer 1

You can use parametrize, also check How to parametrize a Pytest fixture:

@pytest.mark.parametrize("key, value", (
        ("key1", "new_value1"),
        ("key2", "new_value2")
))
def test_1(env, key, value):
    env[key] = value

    do_work(env)