c# - 使用 Moq 验证具有正确命令参数的 CommandHandler 方法调用

Question

我有以下测试用例:

    [Test]
    public void MarkAsSuccessfulTest()
    {
        //setup data
        var payment = Util.DbUtil.CreateNewRecurringProfilePayment();

        //unit test

        var mockNotificationSender = new Mock<IMarkAsSuccessfulNotificationSender>();
        var mockCommandHandler = new Mock<IDbCommandHandler<RecurringPaymentMarkAsSuccessfulCommand>>();

        var classUnderTest = new RecurringProfileMarkLastPaymentAsSuccessful(mockCommandHandler.Object, mockNotificationSender.Object);

        classUnderTest.MarkAsSuccessful(payment.RecurringProfile);
        mockCommandHandler.Verify(x=>x.Handle(It.IsAny<RecurringPaymentMarkAsSuccessfulCommand>()), Times.Once());
        mockNotificationSender.Verify(x=>x.SendNotification(payment), Times.Once());

    }

问题出在线路上:

mockCommandHandler.Verify(x=>x.Handle(It.IsAny<RecurringPaymentMarkAsSuccessfulCommand>()), Times.Once())

这验证调用了 .Handle() 方法。然而，这对于测试来说还不够——这个 .Handle() 接受一个命令参数，它有一个属性——Payment。我想验证此参数是否确实与 payment 变量匹配。

这可能吗，还是某些代码设计存在问题？

Answer 1

您可以提供谓词进行参数验证:

mockCommandHandler.Verify(x => 
   x.Handle(It.Is<RecurringPaymentMarkAsSuccessfulCommand>(c => c.Payment == payment))
   , Times.Once());