public async Task AddAsync_Set_ExpiryTimeAtDocumentLevel_ItemDoesntExistInCache()
{
// Arrange
var cacheValue = "Test";
await stringCache.AddAsync(new CacheItem <string>(CacheKey, cacheValue, TimeSpan.FromSeconds(5)));
// Act
await Task.Delay(TimeSpan.FromSeconds(7));
// Assert
Assert.False(await stringCache.ExistsAsync(CacheKey));
}