public void SecondReadStillReturnTheResultOfFirstDespiteCacheExpiredBecauseItWasLocked()
{
var LocksCollection = new TestLocksCollection <string, InMemoryCache.CachedObjectLock>();
ICache cache = new InMemoryCacheAllow0Expiry(LocksCollection);
var thread1CacheController = new UnitTestThreadCacheController();
thread1CacheController.hold = true;
thread1CacheController.expirySeconds = 0;
var resultFromThread1 = new object();
var thread2CacheController = new UnitTestThreadCacheController();
thread2CacheController.cacheKey = thread1CacheController.cacheKey;
var resultFromThread2 = new object();
FireReadingFromCache(cache, thread1CacheController, resultFromThread1);
WaitUntilThreadStartsPopulating(thread1CacheController);
FireReadingFromCache(cache, thread2CacheController, resultFromThread2);
WaitUntilTwoThreadsPickedLockObjectsUp(LocksCollection);
thread1CacheController.hold = false;
EnsureReadingFinished(thread1CacheController);
EnsureReadingFinished(thread2CacheController);
Assert.Equal(resultFromThread1, thread1CacheController.result);
Assert.Equal(resultFromThread1, thread2CacheController.result);
}
public void Cache_returns_newly_stored_item_after_previous_item_expired()
{
// Arrange
ICache cache = new InMemoryCacheAllow0Expiry();
var obj1 = new object();
var obj2 = new object();
var key = GenerateUniqueCacheKey();
cache.Get(key, TimeSpan.FromSeconds(0), () => obj1);
// Act
var cacheItem = cache.Get(key, TimeSpan.FromTicks(100), () => obj2);
// Assert
Assert.Equal(obj2, cacheItem);
}
