gen_test.py 文件源码

def test_sync_raise_return(self):
        # gen.Return is allowed in @gen.engine, but it may not be used
        # to return a value.
        @gen.engine
        def f():
            self.stop(42)
            raise gen.Return()

        result = self.run_gen(f)
        self.assertEqual(result, 42)