_asynctest.py 文件源码

def _run(self, methodName, result):
        from twisted.internet import reactor
        timeout = self.getTimeout()
        def onTimeout(d):
            e = defer.TimeoutError("%r (%s) still running at %s secs"
                % (self, methodName, timeout))
            f = failure.Failure(e)
            # try to errback the deferred that the test returns (for no gorram
            # reason) (see issue1005 and test_errorPropagation in
            # test_deferred)
            try:
                d.errback(f)
            except defer.AlreadyCalledError:
                # if the deferred has been called already but the *back chain
                # is still unfinished, crash the reactor and report timeout
                # error ourself.
                reactor.crash()
                self._timedOut = True # see self._wait
                todo = self.getTodo()
                if todo is not None and todo.expected(f):
                    result.addExpectedFailure(self, f, todo)
                else:
                    result.addError(self, f)
        onTimeout = utils.suppressWarnings(
            onTimeout, util.suppress(category=DeprecationWarning))
        method = getattr(self, methodName)
        if inspect.isgeneratorfunction(method):
            exc = TypeError(
                '%r is a generator function and therefore will never run' % (
                    method,))
            return defer.fail(exc)
        d = defer.maybeDeferred(
            utils.runWithWarningsSuppressed, self._getSuppress(), method)
        call = reactor.callLater(timeout, onTimeout, d)
        d.addBoth(lambda x : call.active() and call.cancel() or x)
        return d