tests/test_cache.py

"""Bounded cache behavior."""

from core.cache import LRUCache


def test_lru_cache_promotes_reads_before_eviction() -> None:
    cache: LRUCache[str, int] = LRUCache(capacity=2)
    assert cache.put("a", 1) is None
    assert cache.put("b", 2) is None

    assert cache.get("a") == 1
    assert cache.put("c", 3) == ("b", 2)
    assert cache.get("a") == 1
    assert cache.get("c") == 3