from lyra_worker.adapters.fakes import FakeSimilaritySource
from lyra_worker.similarity.base import SimilarArtist, SimilaritySource


def test_fake_conforms_to_protocol_and_returns_similar():
    src = FakeSimilaritySource(similar={"seed": [SimilarArtist("c1", "Cand", 0.9)]})
    assert isinstance(src, SimilaritySource)
    assert src.health() is True
    assert src.similar_artists("seed") == [SimilarArtist("c1", "Cand", 0.9)]
    assert src.similar_artists("unknown") == []


def test_fake_can_report_unhealthy():
    assert FakeSimilaritySource(healthy=False).health() is False