Method test_executable_inference

mypy/test/testargs.py:27–78

Test the --python-executable flag with --python-version

(self)

        assert options.snapshot() == parsed_options.snapshot()

    def test_executable_inference(self) -> None:
        """Test the --python-executable flag with --python-version"""
        sys_ver_str = "{ver.major}.{ver.minor}".format(ver=sys.version_info)

        base = ["file.py"]  # dummy file

        # test inference given one (infer the other)
        matching_version = base + [f"--python-version={sys_ver_str}"]
        _, options = process_options(matching_version)
        assert options.python_version == sys.version_info[:2]
        assert options.python_executable == sys.executable

        matching_version = base + [f"--python-executable={sys.executable}"]
        _, options = process_options(matching_version)
        assert options.python_version == sys.version_info[:2]
        assert options.python_executable == sys.executable

        # test inference given both
        matching_version = base + [
            f"--python-version={sys_ver_str}",
            f"--python-executable={sys.executable}",
        ]
        _, options = process_options(matching_version)
        assert options.python_version == sys.version_info[:2]
        assert options.python_executable == sys.executable

        # test that --no-site-packages will disable executable inference
        matching_version = base + [f"--python-version={sys_ver_str}", "--no-site-packages"]
        _, options = process_options(matching_version)
        assert options.python_version == sys.version_info[:2]
        assert options.python_executable is None

        # Test setting python_version/executable from config file
        special_opts = argparse.Namespace()
        special_opts.python_executable = None
        special_opts.python_version = None
        special_opts.no_executable = None

        # first test inferring executable from version
        options = Options()
        options.python_executable = cast(Any, None)
        options.python_version = sys.version_info[:2]
        infer_python_executable(options, special_opts)
        assert options.python_version == sys.version_info[:2]
        assert options.python_executable == sys.executable

        # then test inferring version from executable
        options = Options()
        options.python_executable = sys.executable
        infer_python_executable(options, special_opts)
        assert options.python_version == sys.version_info[:2]
        assert options.python_executable == sys.executable