test_file_loader.py 文件源码

def test_old_timestamp(self):
        # When the timestamp is older than the source, bytecode should be
        # regenerated.
        zeros = b'\x00\x00\x00\x00'
        with source_util.create_modules('_temp') as mapping:
            py_compile.compile(mapping['_temp'])
            bytecode_path = imp.cache_from_source(mapping['_temp'])
            with open(bytecode_path, 'r+b') as bytecode_file:
                bytecode_file.seek(4)
                bytecode_file.write(zeros)
            self.import_(mapping['_temp'], '_temp')
            source_mtime = os.path.getmtime(mapping['_temp'])
            source_timestamp = importlib._w_long(source_mtime)
            with open(bytecode_path, 'rb') as bytecode_file:
                bytecode_file.seek(4)
                self.assertEqual(bytecode_file.read(4), source_timestamp)

    # [bytecode read-only]