fixture parallelization using the pytest.mark.parameterize indirect=True argument

test_fixture_parallelization.py

import pytest


@pytest.fixture(name="keys")
def keys_fixture(request):
    """A seq of keys"""
    return request.param


@pytest.fixture(name="values")
def values_fixture(request):
    """A seq of values"""
    return request.param


@pytest.fixture(name="a_dict_from_kv_pairs")
def a_dict_from_kv_pairs_fixture(keys, values):
    """An initialized dict from a seq of keys and values"""
    return dict(zip(keys, values))


some_keys_and_values = [
    # keys              values
    [("a", "b", "c"), (1, 2, 3)],
    [("x", "y", "z"), (None, (), object())],
]

parametrize_some_keys_and_values = pytest.mark.parametrize("keys, values", some_keys_and_values, indirect=True)


@parametrize_some_keys_and_values
def test_a_dict_from_kv_pairs_truthy(a_dict_from_kv_pairs):
    assert a_dict_from_kv_pairs


@parametrize_some_keys_and_values
def test_a_dict_from_kv_pairs_getitem(keys, values, a_dict_from_kv_pairs):
    for k,v in zip(keys, values):
        assert a_dict_from_kv_pairs[k] == v