It.IsAny(), It.IsAny< shippingdetail>(), Times.Never()
本文关键字:It IsAny Never Times shippingdetail Cart | 更新日期: 2023-09-27 18:09:10
我想知道您是否可以帮助我理解下面这行:
mock.Verify(m => m.ProcessOrder(It.IsAny<Cart>(),
It.IsAny<ShippingDetails>()),
Times.Never());
试验方法:
[TestMethod]
public void Cannot_Checkout_Empty_Cart()
{
// Arrange - create a mock order processor
Mock<IOrderProcessor> mock = new Mock<IOrderProcessor>();
// Arrange - create an empty cart
Cart cart = new Cart();
// Arrange - create shipping details
ShippingDetails shippingDetails = new ShippingDetails();
// Arrange - create an instance of the controller
CartController target = new CartController(null, mock.Object);
// Act
ViewResult result = target.Checkout(cart, shippingDetails);
// Assert - check that the order hasn't been passed on to the processor
mock.Verify(m => m.ProcessOrder(It.IsAny<Cart>(), It.IsAny<ShippingDetails>()), Times.Never());
// Assert - check that the method is returning the default view
Assert.AreEqual("", result.ViewName);
// Assert - check that we are passing an invalid model to the view
Assert.AreEqual(false, result.ViewData.ModelState.IsValid);
}
It.IsAny<Cart>
匹配任何Cart类型的值。由于您有Times.Never
,您实际上验证了方法从未使用两个参数(Card, ShippingDetails)调用。
@Wiktor是对的,但只是为了澄清两者的区别。
当前检查确保该方法没有被ANY购物车或ANY发货细节调用。这可能看起来有点过分,因为这可能已经足够了:
// Assert - check that the order hasn't been passed on to the processor
mock.Verify(m => m.ProcessOrder(cart, shippingsDetails), Times.Never());
毕竟,处理很可能将使用给定的购物车和运输详细信息完成。然而,购物车可能已经被克隆,或者一些运输细节可能已经从用户首选项或其他东西中加载,并且It.IsAny<T>
允许您检查无论参数如何都没有调用该方法,否则验证只会与这些特定实例作为参数一起发生。
编辑
回答评论。想象一下另一个测试,在这个测试中,您想要检查订单是否被处理了,并且它是用正确的参数处理的,而不是用一些不同的用户购物车和发货细节处理的:
// Arrange - create an empty cart
Cart cart = new Cart();
// Arrange - create shipping details
ShippingDetails shippingDetails = new ShippingDetails();
// Arrange - create an instance of the controller
CartController target = new CartController(null, mock.Object);
// Act
ViewResult result = target.Checkout(cart, shippingDetails);
//Assert - check the order was processed once with the
//correct cart and shipping details
mock.Verify(m => m.ProcessOrder(cart, shippingDetails), Times.Once());
现在,如果ProcessOrder
方法没有使用预期的完全相同的购物车和运输详细信息调用,则该测试将失败。如果碰巧使用了另一个用户的购物车或送货详细信息,那么测试将失败。
希望这能澄清明确指定参数和使用It.IsAny<T>
验证方法ProcessOrder
从未在测试期间使用任何类型的Cart
和ShippingDetails
作为参数调用。