public void Test_GetAll_Return_Right_Number_Of_Objects()
{
//arrange
OrderService service = new OrderService(_unitOfWork.Object);
//act
IEnumerable<OrderDTO> orders = service.GetAll();
//assert
Assert.AreEqual(2, orders.Count());
}
public void Test_Add_Call_Insert()
{
//arrange
OrderService service = new OrderService(_unitOfWork.Object);
OrderDTO order = new OrderDTO() { OrderId = 1, CustomerId = 1};
//act
service.Add(order);
//assert
_ordersRepository.Verify( o => o.Insert(It.IsAny<Order>()), Times.Once() );
}