public void IsDuplicateTest()
{
var service = new YouTubeService();
service
.IsDuplicate(YouTuberHelpers.UnifyYouTubeUrl("https://www.youtube.com/watch?v=3rJfBFamlIw"))
.ShouldBe(false);
service
.IsDuplicate(YouTuberHelpers.UnifyYouTubeUrl("https://www.youtube.com/watch?v=3rJfBFamlIw"))
.ShouldBe(true);
service
.IsDuplicate(YouTuberHelpers.UnifyYouTubeUrl("https://www.youtube.com/watch?v=3rJfBFamlIw"))
.ShouldBe(true);
}