testing_test.py 文件源码

def test_multiple_errors(self):
        def fail(message):
            raise Exception(message)
        self.io_loop.add_callback(lambda: fail("error one"))
        self.io_loop.add_callback(lambda: fail("error two"))
        # The first error gets raised; the second gets logged.
        with ExpectLog(app_log, "multiple unhandled exceptions"):
            with self.assertRaises(Exception) as cm:
                self.wait()
        self.assertEqual(str(cm.exception), "error one")