public void ReturnFalseWhenAutopartIsNotFavoriteForUser()
        {
            var list           = new List <Favorite>();
            var mockRepository = new Mock <IDeletableEntityRepository <Favorite> >();

            mockRepository
            .Setup(x => x.AllAsNoTracking())
            .Returns(list.AsQueryable());

            var autopartId = 123;
            var userId     = "User_01";

            list.Add(new Favorite {
                AutopartId = 321, UserId = "User_02"
            });

            var service = new FavoritesService(mockRepository.Object);

            var result = service.CheckIfAutopartIsFavoriteForUser(userId, autopartId);

            Assert.False(result);
        }