test_defer.py 文件源码

def testDeferredListWithAlreadyFiredDeferreds(self):
        # Create some deferreds, and err one, call the other
        d1 = defer.Deferred()
        d2 = defer.Deferred()
        d1.errback(GenericError('Bang'))
        d2.callback(2)

        # *Then* build the DeferredList
        dl = defer.DeferredList([d1, d2])

        result = []
        dl.addCallback(result.append)

        self.failUnlessEqual(1, len(result))

        d1.addErrback(lambda e: None)  # Swallow error