def test_ret_str_equality(self):
        infile_path = INV_TEST_BAD
        prev_ret = INTEG_RET

        with open(prev_ret, "rt") as test_str:
            assert integrity_check(infile_path) == test_str.read()
    def test_diff_files(self, infile_path):

        returned = integrity_check(infile_path)
        assert returned
        assert isinstance(returned, str)