public void BookPromo_GetBookPromo_NotNull()
{
Mock <DbBookStoreContext> mockdb = new Mock <DbBookStoreContext>();
var usersMockBook = UnitTestDBset.CreateDbSetMock(UnitTestDBset.BookList());
mockdb.Setup(x => x.Book).Returns(usersMockBook.Object);
var usersMockCategory = UnitTestDBset.CreateDbSetMock(UnitTestDBset.CategoryList());
mockdb.Setup(x => x.Category).Returns(usersMockCategory.Object);
var usersMockPromo = UnitTestDBset.CreateDbSetMock(UnitTestDBset.PromoList());
mockdb.Setup(x => x.Promo).Returns(usersMockPromo.Object);
//===============================================
IBook testbook = UnitTestDBset.BookList()[0];
var bookpromo = new BookPromo(mockdb.Object);
var resultpromo = bookpromo.GetBookPromo(testbook).Result;
Assert.AreEqual(testbook.PromoID, resultpromo.ID);
Assert.AreNotEqual(0, resultpromo.Discount);
}
