runner.py 文件源码

def addError(self, test, err):
        """Called when an error has occurred. 'err' is a tuple of values as
        returned by sys.exc_info().
        """
        if self._is_mandatory(test):
            err = self._add_mandatory_message(err)
            self.stop()  # <- sets "self.shouldStop = True

        TextTestResult.addError(self, test, err)