Class DummySignal

tests/test_signal_base.py:20–22

def test_signal_is_protocol():
    class DummySignal:
        def predict(self, row: dict) -> TierVote:
            return TierVote(tier_id=0, confidence=1.0)

    sig = DummySignal()
    result = sig.predict({"messages": []})