public async Task CategoryDoesntExistTest()
        {
            var options = new DbContextOptionsBuilder <ApplicationDbContext>()
                          .UseInMemoryDatabase(databaseName: Guid.NewGuid().ToString()).Options;
            var dbContext = new ApplicationDbContext(options);

            dbContext.Categories.Add(new Category
            {
                Name = "Fist",
            });
            await dbContext.SaveChangesAsync();

            var repository = new EfDeletableEntityRepository <Category>(dbContext);
            var service    = new CategoriesService(repository);

            Assert.False(service.CategoryExist("Test1"));
        }
        public async Task CreateCategoryTest()
        {
            var options = new DbContextOptionsBuilder <ApplicationDbContext>()
                          .UseInMemoryDatabase(databaseName: Guid.NewGuid().ToString()).Options;
            var dbContext = new ApplicationDbContext(options);

            var repository = new EfDeletableEntityRepository <Category>(dbContext);
            var service    = new CategoriesService(repository);

            var category = new CreateCategoryViewModel
            {
                Description = "Test",
                ImageUrl    = "Test",
                Name        = "Test",
            };

            await service.CreateCategoryAsync(category);

            Assert.True(service.CategoryExist("Test"));
        }