public async Task GetCorrectThumbnailLink()
{
var videoList = new List <Video>();
var videoRepo = new Mock <IDeletableEntityRepository <Video> >();
videoRepo.Setup(x => x.All()).Returns(videoList.AsQueryable());
videoRepo.Setup(x => x.AddAsync(It.IsAny <Video>()))
.Callback((Video r) => videoList.Add(r));
var videoService = new VideosService(videoRepo.Object);
await videoService.CreateAsync(test.Title, test.Description, test.VideoUrl, test.Category);
await videoService.CreateAsync(test2.Title, test2.Description, test2.VideoUrl, test2.Category);
var embededLink = videoService.GetThumbnailLink(test.VideoUrl);
var embededLink2 = videoService.GetThumbnailLink(test2.VideoUrl);
Assert.Equal("https://i.ytimg.com/vi/w2ze3Z6BAmg/0.jpg", embededLink);
Assert.Equal("https://i.ytimg.com/vi/03ILbXdE8b4/0.jpg", embededLink2);
}