def test_receiver_info(self):
        info = HeterodyneReceiver.get_receiver_info(HeterodyneReceiver.HARP)
        self.assertIsInstance(info, ReceiverInfo)
        self.assertIsInstance(info.array, ArrayInfo)
        self.assertIsInstance(info.array.jiggle_patterns, OrderedDict)
        self.assertIsInstance(info.array.scan_spacings, OrderedDict)

        info = HeterodyneReceiver.get_receiver_info(HeterodyneReceiver.A3)
        self.assertIsInstance(info, ReceiverInfo)
        self.assertIsNone(info.array, ArrayInfo)