public void SetStringWithTimeout_ItemDoesNotExistAfterTimeout()
{
// Arrange
// Act
var duration = TimeSpan.FromSeconds(3);
stringCache.Set(new CacheItem <string>(CacheKey, "Test", duration));
// Assert
Assert.True(stringCache.Exists(CacheKey));
System.Threading.Thread.Sleep(duration.Add(TimeSpan.FromSeconds(1)));
Assert.False(stringCache.Exists(CacheKey));
}