Function test_show_diff_on_failure

tests/commands/run_test.py:327–346

(
        args,
        expected_out,
        capfd,
        cap_out,
        store,
        tempdir_factory,
)

    ],
)
def test_show_diff_on_failure(
        args,
        expected_out,
        capfd,
        cap_out,
        store,
        tempdir_factory,
):
    git_path = make_consuming_repo(
        tempdir_factory, 'modified_file_returns_zero_repo',
    )
    with cwd(git_path):
        stage_a_file('bar.py')
        _test_run(
            cap_out, store, git_path, args,
            # we're only testing the output after running
            expected_out, 1, True,
        )
    out, _ = capfd.readouterr()
    assert 'diff --git' in out


@pytest.mark.parametrize(