def make_code1_code2(self) -> None:
        """Create the code1.py and code2.py files."""
        self.make_file("code1.py", """\
            code1 = 1
            """)
        self.make_file("code2.py", """\
            code2 = 1
            code2 = 2
            """)
Create the code1.py and code2.py files.
tests/test_api.py