def assert_tryexecfile_output(self, expected: str, actual: str) -> None:
        """Assert that the output we got is a successful run of try_execfile.py.

        `expected` and `actual` must be the same.

        """
        # First, is this even credible try_execfile.py output?
        assert '"DATA": "xyzzy"' in actual
        # If this fails, "+" is actual, and "-" is expected
        assert actual == expected
Assert that the output we got is a successful run of try_execfile.py.

        `expected` and `actual` must be the same.

        
tests/test_process.py