public async Task ExpireAsync_AfterSettingExpireAndWaiting_ItemDoesntExistInCache()
{
// Arrange
var cacheValue = "Test";
var expireIn = new TimeSpan(0, 0, 2);
await stringCache.SetAsync(new CacheItem <string>(CacheKey, cacheValue, TimeSpan.FromSeconds(5)));
// Act
await stringCache.KeyExpireAsync(CacheKey, expireIn);
await Task.Delay(expireIn.Add(TimeSpan.FromSeconds(1)));
// Assert
Assert.False(await stringCache.ExistsAsync(CacheKey));
}