public void BackgroundCleanupIsInitiatedWhenIntervalIsSet()
{
CacheOptions options = CacheOptions.SlidingExpiration(new TimeSpan(0, 0, 0, 0, 50));
// Initially values are not getting purged because the interval is 0.
Cache.Set("key", "value", options);
Thread.Sleep(300);
Assert.IsTrue(Cache.ContainsKey("key"));
// Cleanup manually to demonstrate that the value should go away.
Cache.Cleanup();
Assert.IsFalse(Cache.ContainsKey("key"));
// Now enable auto-cleanup
Cache.CleanupIntervalInMilliseconds = 100;
Assert.AreEqual(100, Cache.CleanupIntervalInMilliseconds);
// Add some values and watch them get purged periodically.
Cache.Set("key", "value", options);
Thread.Sleep(300);
Assert.IsFalse(Cache.ContainsKey("key"));
Cache.Set("key", "value", options);
Thread.Sleep(300);
Assert.IsFalse(Cache.ContainsKey("key"));
// Now stop the cleanup and notice that they don't get purged anymore.
Cache.CleanupIntervalInMilliseconds = 0;
Cache.Set("key", "value", options);
Thread.Sleep(300);
Assert.IsTrue(Cache.ContainsKey("key"));
}
public void CleanupPurgesExpiredEntries()
{
Cache.Set("key1", "value1", CacheOptions.AbsoluteExpiration(DateTime.UtcNow));
Cache.Set("key2", "value2", CacheOptions.AbsoluteExpiration(DateTime.MinValue));
Cache.Set("key3", "value3", CacheOptions.AbsoluteExpiration(DateTime.MaxValue));
Cache.Set("key4", "value4", CacheOptions.SlidingExpiration(TimeSpan.Zero));
Cache.Set("key5", "value5", CacheOptions.NoExpiration);
Thread.Sleep(100); // Cause keys to expire
Cache.Cleanup();
// Note: Order of ContainsKey / Get matters because ContainsKey
// doesn't auto-expire values like Get does.
Assert.IsFalse(Cache.ContainsKey("key1"));
Assert.AreEqual(null, Cache.Get("key1"));
Assert.IsFalse(Cache.ContainsKey("key2"));
Assert.AreEqual(null, Cache.Get("key2"));
Assert.IsTrue(Cache.ContainsKey("key3"));
Assert.AreEqual("value3", Cache.Get("key3"));
Assert.IsFalse(Cache.ContainsKey("key4"));
Assert.AreEqual(null, Cache.Get("key4"));
Assert.IsTrue(Cache.ContainsKey("key5"));
Assert.AreEqual("value5", Cache.Get("key5"));
}
public void SlidingExpirationFactory()
{
CacheOptions options = CacheOptions.SlidingExpiration(new TimeSpan(1, 2, 3));
Assert.AreEqual(new TimeSpan(1, 2, 3), options.SlidingExpirationTimeSpan);
Assert.IsNull(options.AbsoluteExpirationTime);
Assert.AreEqual(0, options.CustomOptions.Count);
}