public void OnSaleFrom_Should_Throw_ArgumentNullException_If_Products_Is_Null()
{
IQueryable <Product> products = null;
DateTime fromDate = DateTime.Today;
var ex = Assert.Throws <ArgumentNullException>(() => ProductExtensions.OnSaleFrom(products, fromDate));
Assert.Equal(nameof(products), ex.ParamName);
}
public void OnSaleFrom_Should_Return_Only_Products_On_Sale_With_OnSaleFrom_Date_Greater_Than_The_Specified_Date()
{
var p1 = Product.Create("ean", "sku", "name", "url");
var p2 = Product.Create("ean", "sku", "name", "url");
var p3 = Product.Create("ean", "sku", "name", "url");
p1.SetOnSale();
p2.SetOnSale(DateTime.Today, null);
IQueryable <Product> products = new Product[]
{
p1, p2, p3
}.AsQueryable();
DateTime fromDate = DateTime.Today;
var productsOnSale = ProductExtensions.OnSaleFrom(products, fromDate).ToArray();
Assert.True(productsOnSale.All(p => p.IsOnSale && p.OnSaleFrom >= fromDate));
}