public void RemoveCategoryDiscount()
{
CategoryDiscount expected = new CategoryDiscount("d2", "WanderlandItems", "T", DateTime.Parse("1/1/2018"), DateTime.Parse("31/12/2018"), 50);
handler.AddCategoryDiscount(expected);
var find = handler.GetCategoryDiscount("WanderlandItems", "T");
Assert.AreEqual(expected, find);
handler.RemoveCategoryDiscount(expected);
find = handler.GetCategoryDiscount("WanderlandItems", "T");
Assert.IsNull(find);
}
