mock pytest parametrize test

pytest_mock_example.py

# first install pip3 install pytest-mock
import os
import pytest
class TestNodeInteractor:

    def exists(self, path):
        return os.path.exists(path)

    @pytest.fixture(autouse=True)
    def mock_exists(self, mocker, expect):
        mocker.patch('os.path.exists', return_value=expect)

    @pytest.mark.parametrize(
        "path, expect",
        [('foo', True), ('bar', False)],
    )
    def test_exists(self, path, expect):
        assert self.exists(path) == expect