即使调用方法,Moq验证方法也会失败

Question

我使用Moq遇到了一些麻烦.单元测试后会抛出异常,即使将调用相应的方法.

[TestMethod]
public void CreateFinishTest() {
    // mock methods 
    factoryMock.Setup(f => f.LoadPlan("TestPlanDoNotUse")).Returns(testPlan).Verifiable();
    factoryMock.Setup(f => f.CreateFinish(It.IsAny<CreateFinishMessage>(), It.IsAny<string>())).Returns(testFinish.Id).Verifiable();

    try {
        var cfm = new CreateFinishMessage() {
            ClientId = 11,
            MessageId = 23456,
            CustomerId = 6,
            FinishName = "MyFinish",
            PlanId = "TestPlanDoNotUse"
        };
        var cmd = sysCfg.Executor.CreateFinish(cfm); // calls LoadPlan with cfm.PlanId and CreateFinish with cfm and cfm.PlanId
        sysCfg.Executor.Execute(cmd);

        factoryMock.Verify(f => f.LoadPlan("TestPlanDoNotUse"), Times.Exactly(1));
        factoryMock.Verify(f => f.CreateFinish(It.IsAny<CreateFinishMessage>(), It.IsAny<string>()), Times.Exactly(1));
    } catch (Exception exc) {
        Assert.Fail(exc.Message);
    }
}

发生此错误:

Expected invocation on the mock exactly 1 times, but was 0 times: f => f.LoadPlan("TestPlanDoNotUse")

Configured setups:
f => f.LoadPlan("TestPlanDoNotUse"), Times.Once

Performed invocations:
IFactory.LoadPlan("TestPlanDoNotUse")
Factory.CreateFinish(IndiValue.LiveMarket.IndiCore.Communication.MessagingFormat.CreateFinishMessage, "MyFinish")

我尝试了几种不同的验证调用,但它不起作用.并且发生的错误看起来很混乱,它说LoadPlan("TestPlanDoNotUse")永远不会被调用,但它列出了@Performed invocations.

问题解决了:

我想我发现了问题,这不是Moq的问题.在sysCfg.Executor.CreateFinish(cfm)新线程中创建并启动.这个线程没有完成,因此 factoryMock.Verify(...)失败了.

我使用了AutoResetEvents:

// create AutoResetEvent triggers
AutoResetEvent m_testTrigger1 = new AutoResetEvent(false);

// mock methods     
factoryMock.Setup(f => f.LoadPlan(It.IsAny<string>())).Returns(testPlan).Callback(() => m_testTrigger1.Set());

// do something

// wait for triggers
bool didReturn1 = m_testTrigger1.WaitOne(timeOut);

Answer 1

您通常不会在设置中使用Verifiable()以及Verify(expr,times)方法.如果删除.Verifiable()调用,它是否有效？

Answer 2

在Verifiable未被调用时,期望中的参数与生产代码使用的参数匹配非常重要.

关于Thread.Sleep的使用,尽可能避免使用它,因为它只会减慢测试速度以满足您最慢的机器.我通常会将WaitHandles引入我的测试中,以确保测试的运行速度与代码一样快.

以一个在这里一个小工具偷看使用WaitHandles的事件.