public IQueryable<ProductReview> GetReviews() {
            List<ProductReview> result = new List<ProductReview>();
            for (int i = 1; i <= 30; i++) {

                ProductReview review = new ProductReview();
                review.Author = "TestAuthor";
                review.Body = "lorem ipsum";
                review.Email = "*****@*****.**";
                review.ProductID = i;
                review.ID = i;
                result.Add(review);
            }
            return result.AsQueryable();
        }
        public void Review_ShouldHave_Author_Email_ProductID_Body_Date() {

            ProductReview p = new ProductReview("Rob", 
                "*****@*****.**", 1, "lorem ipsum");
            Assert.AreEqual("Rob", p.Author);
            Assert.AreEqual("*****@*****.**", p.Email);
            Assert.AreEqual(1, p.ProductID);
            Assert.AreEqual("lorem ipsum", p.Body);
        }