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import asyncio
from typing import Callable
from async_lru import alru_cache
async def test_ttl_infinite_cache(check_lru: Callable[..., None]) -> None:
@alru_cache(maxsize=None, ttl=0.1)
async def coro(val: int) -> int:
return val
assert await coro(1) == 1
check_lru(coro, hits=0, misses=1, cache=1, tasks=0, maxsize=None)
await asyncio.sleep(0.0)
assert await coro(1) == 1
check_lru(coro, hits=1, misses=1, cache=1, tasks=0, maxsize=None)
await asyncio.sleep(0.2)
# cache is clear after ttl expires
check_lru(coro, hits=1, misses=1, cache=0, tasks=0, maxsize=None)
assert await coro(1) == 1
check_lru(coro, hits=1, misses=2, cache=1, tasks=0, maxsize=None)
async def test_ttl_limited_cache(check_lru: Callable[..., None]) -> None:
@alru_cache(maxsize=1, ttl=0.1)
async def coro(val: int) -> int:
return val
assert await coro(1) == 1
check_lru(coro, hits=0, misses=1, cache=1, tasks=0, maxsize=1)
assert await coro(2) == 2
check_lru(coro, hits=0, misses=2, cache=1, tasks=0, maxsize=1)
await asyncio.sleep(0)
assert await coro(2) == 2
check_lru(coro, hits=1, misses=2, cache=1, tasks=0, maxsize=1)
assert await coro(1) == 1
check_lru(coro, hits=1, misses=3, cache=1, tasks=0, maxsize=1)
async def test_ttl_with_explicit_invalidation(check_lru: Callable[..., None]) -> None:
@alru_cache(maxsize=None, ttl=0.2)
async def coro(val: int) -> int:
return val
assert await coro(1) == 1
check_lru(coro, hits=0, misses=1, cache=1, tasks=0, maxsize=None)
coro.cache_invalidate(1)
check_lru(coro, hits=0, misses=1, cache=0, tasks=0, maxsize=None)
await asyncio.sleep(0.1)
assert await coro(1) == 1
check_lru(coro, hits=0, misses=2, cache=1, tasks=0, maxsize=None)
await asyncio.sleep(0.1)
# cache is not cleared after ttl expires because invalidate also should clear
# the invalidation by timeout
check_lru(coro, hits=0, misses=2, cache=1, tasks=0, maxsize=None)
async def test_ttl_concurrent() -> None:
@alru_cache(maxsize=1, ttl=1)
async def coro(val: int) -> int:
return val
results = await asyncio.gather(*(coro(i) for i in range(2)))
assert results == list(range(2))
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