public void ProductPriceGreaterThanSpecification_ShouldNotBeSatisfied_WhenProductIsNotOnSale()
        {
            var product = new Product(50, false);

            var result = new ProductPriceGreaterThanSpecification(50).IsSatisfiedBy(product);

            Assert.That(result, Is.False);
        }
 public List<Product> GetSaleProductsOverPrice(double highItemPrice)
 {
     Specification<Product> saleSpec = new ProductOnSaleSpecification();
     Specification<Product> priceSpec = new ProductPriceGreaterThanSpecification(highItemPrice);
     return Items.FindAll(saleSpec.And(priceSpec).IsSatisfiedBy);
 }