public void BindProduct_ShouldReturnTrue_WhenParentProductExists()
        {
            //Arrange
            var productId    = Guid.NewGuid();
            var productTitle = "Mobile Phone";
            var productDto   = new ProductModel
            {
                Id    = productId,
                Title = productTitle
            };

            ProductOperations.ProductList.Add(productDto);

            var categoryId    = Guid.NewGuid();
            var categoryTitle = "Technology";
            var categoryDto   = new CategoryModel
            {
                Id             = categoryId,
                Title          = categoryTitle,
                ParentCategory = new CategoryModel()
            };

            ProductOperations.ProductList.Add(productDto);

            //Act
            var result = _productOperations.BindCategory(productId, categoryDto);

            //Assert
            Assert.True(result);
        }