public async Task CheckAddingSkinTypeAndNonExistingSkinProblemsToUserAsync()
        {
            ApplicationDbContext db = GetDb();

            var repository                   = new EfDeletableEntityRepository <ApplicationUser>(db);
            var skinProblemsRepository       = new EfDeletableEntityRepository <SkinProblem>(db);
            var clientSkinProblemsRepository = new EfRepository <ClientSkinProblem>(db);

            var service = new UsersService(
                repository,
                skinProblemsRepository,
                clientSkinProblemsRepository,
                this.cardsRepository.Object,
                this.cloudinaryService.Object);

            var skinType = new SkinType()
            {
                Id = "1"
            };

            var firstSkinProblem = new SkinProblem()
            {
                Id   = "1",
                Name = "first problem",
            };

            var secondSkinProblem = new SkinProblem()
            {
                Id   = "2",
                Name = "second problem",
            };

            var thirdSkinProblem = new SkinProblem()
            {
                Id   = "3",
                Name = "third problem",
            };

            SkinProblem[] skinProblems = new SkinProblem[]
            {
                firstSkinProblem,
                secondSkinProblem,
                thirdSkinProblem,
            };

            await db.SkinProblems.AddRangeAsync(skinProblems);

            await db.Users.AddAsync(this.client);

            await db.SkinTypes.AddAsync(skinType);

            await db.SaveChangesAsync();

            string[] skinProblemsNames = new string[]
            {
                firstSkinProblem.Name,
                secondSkinProblem.Name,
                thirdSkinProblem.Name,
            };

            await service.AddSkinTypeDataAsync(this.client.Id, true, skinType.Id, skinProblemsNames);

            await service.AddSkinTypeDataAsync(this.client.Id, true, skinType.Id, skinProblemsNames);

            Assert.True(this.client.IsSkinSensitive);
            Assert.Equal(3, this.client.ClientSkinProblems.Count());
        }