public async Task AddNewCategoryByNameTests()
        {
            //Arrange
            var mapperConfig = new MapperConfiguration(x => x.AddProfile(new MappingProfile()));
            var mapper       = mapperConfig.CreateMapper();

            var categoryService = new CategoryService(this.context, mapper);

            var categoryModel = new AddNewCategoryBindingModel
            {
                Name = "CategoryName"
            };

            //Act
            Assert.Equal(0, this.context.Categories.Count());

            await categoryService.AddNewCategoryByName(categoryModel);

            //Assert
            Assert.Equal(1, this.context.Categories.Count());
        }