stack_context_test.py 文件源码

def test_yield_in_with_exception_stack_context(self):
        # As above, but with ExceptionStackContext instead of StackContext.
        @gen.engine
        def f():
            with ExceptionStackContext(lambda t, v, tb: False):
                yield gen.Task(self.io_loop.add_callback)

        with self.assertRaises(StackContextInconsistentError):
            f()
            self.wait()