from app.public_cache import PublicResponseCache


def test_cache_copies_values_and_invalidates() -> None:
    cache = PublicResponseCache()
    original = [{"score": 10}]
    cache.set(("activity",), original)
    original[0]["score"] = 99
    assert cache.get(("activity",), 20) == [{"score": 10}]
    cache.invalidate()
    assert cache.get(("activity",), 20) is None


def test_cache_bounds_memory_and_rejects_result_started_before_invalidation() -> None:
    cache = PublicResponseCache(max_entries=2)
    generation = cache.generation()
    cache.set((1,), [1])
    cache.set((2,), [2])
    cache.set((3,), [3])
    assert cache.get((1,), 20) is None
    cache.invalidate()
    cache.set((4,), [4], generation=generation)
    assert cache.get((4,), 20) is None