Method test_cached_readonly

Lib/test/test_import/__init__.py:1340–1352

(self)

                         "test meaningful only on posix systems")
    @os_helper.skip_unless_working_chmod
    def test_cached_readonly(self):
        mode = 0o400
        with temp_umask(0o022), ready_to_import() as (name, path):
            cached_path = importlib.util.cache_from_source(path)
            os.chmod(path, mode)
            __import__(name)
            if not os.path.exists(cached_path):
                self.fail("__import__ did not result in creation of "
                          "a .pyc file")
            stat_info = os.stat(cached_path)

        expected = mode | 0o200 # Account for fix for issue #6074
        self.assertEqual(oct(stat.S_IMODE(stat_info.st_mode)), oct(expected))

    def test_pyc_always_writable(self):
        # Initially read-only .pyc files on Windows used to cause problems