gen_test.py 文件源码

def test_multi_exceptions(self):
        with ExpectLog(app_log, "Multiple exceptions in yield list"):
            with self.assertRaises(RuntimeError) as cm:
                yield gen.Multi([self.async_exception(RuntimeError("error 1")),
                                 self.async_exception(RuntimeError("error 2"))])
        self.assertEqual(str(cm.exception), "error 1")

        # With only one exception, no error is logged.
        with self.assertRaises(RuntimeError):
            yield gen.Multi([self.async_exception(RuntimeError("error 1")),
                             self.async_future(2)])

        # Exception logging may be explicitly quieted.
        with self.assertRaises(RuntimeError):
            yield gen.Multi([self.async_exception(RuntimeError("error 1")),
                             self.async_exception(RuntimeError("error 2"))],
                            quiet_exceptions=RuntimeError)