public void FindProductsTest()
{
Salad testSalad = new Salad("TestSalad");
Product product1 = new Cereal("Rice", 900, 12, 56, 5);
Product product2 = new Vegetable("Onion", 60, 12, 2, 5);
Product product3 = new Vegetable("Something", 35, 34, 3, 65);
Product product4 = new Sauce("SourCream", 200, 5, 3, 85);
testSalad.ProductSalad.Add(product1);
testSalad.ProductSalad.Add(product2);
testSalad.ProductSalad.Add(product3);
testSalad.ProductSalad.Add(product4);
List <Product> testFindedProduct = testSalad.FindProducts(0, 150);
List <Product> correctFindedProduct = new List <Product> ();
correctFindedProduct.Add(product2);
correctFindedProduct.Add(product3);
CollectionAssert.AreEqual(correctFindedProduct, testFindedProduct);
}