def test_telemetry_predicates(self):
        temp1 = ChTemplate(1, "Test Channel 1", "Predicate_Tester", I32Type())
        temp2 = ChTemplate(2, "Test Channel 2", "Predicate_Tester",
                           StringType())
        update1 = ChData(I32Type(20), TimeType(), temp1)
        update2 = ChData(StringType("apple"), TimeType(), temp2)

        pred = predicates.telemetry_predicate()
        assert pred(
            update1
        ), "If no fields are specified a ChData object should return True"
        assert pred(
            update2
        ), "If no fields are specified a ChData object should return True"
        assert not pred(
            "diff object"
        ), "Anything that's not a ChData object should be False"
        assert not pred(
            5), "Anything that's not a ChData object should be False"
        self.check_str(pred)

        id_pred = predicates.equal_to(1)
        pred = predicates.telemetry_predicate(id_pred=id_pred)
        assert pred(update1), "This predicate on the ID 1 should return True"
        assert not pred(
            update2), "This predicate on the ID 2 should return False"
        self.check_str(pred)

        val_pred = predicates.equal_to("apple")
        pred = predicates.telemetry_predicate(value_pred=val_pred)
        assert not pred(
            update1), "This predicate on the value 20 should return False"
        assert pred(
            update2
        ), "This predicate on the value \"apple\" should return True"
        self.check_str(pred)

        time_pred = predicates.equal_to(0)
        pred = predicates.telemetry_predicate(time_pred=time_pred)
        assert pred(update1), "This predicate on the time 0 should return True"
        assert pred(update2), "This predicate on the time 0 should return True"
        self.check_str(pred)

        val_pred = predicates.within_range(10, 30)
        pred = predicates.telemetry_predicate(id_pred, val_pred, time_pred)
        assert pred(
            update1), "Specifying all fields should return True for update 1"
        assert not pred(
            update2), "Specifying all fields should return False for update 2"
        self.check_str(pred)