public void CreateNewOrder_InvalidObjectPassed_ReturnsBadRequest()
{
// Arrange
Order idMissingItem = new Order()
{
Order_status = "paid",
Amount = 100,
Discount = 0,
Order_date = new DateTime(2010, 2, 2),
Shipped_date = new DateTime(2011, 2, 2),
Customer_email = "*****@*****.**"
};
controller.ModelState.AddModelError("Id", "Required");
// Act
var badResponse = controller.Create_new_order(idMissingItem);
// Assert
Assert.IsType <BadRequestObjectResult>(badResponse);
}