gen_test.py 文件源码

def test_multi_future_exceptions(self):
        with ExpectLog(app_log, "Multiple exceptions in yield list"):
            with self.assertRaises(RuntimeError) as cm:
                yield [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 [self.async_exception(RuntimeError("error 1")),
                   self.async_future(2)]

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