Question

我需要测试事件。我在课堂上举办了一个活动，但我没有在考试中得到它。是什么原因？ Object_TransferInterruptedEvent1是较新的执行。这是演示代码。

public class A
{
    public virtual event EventHandler<EventArgs<Tuple<Step, string>>> TransferInterruptedEvent;

    public void Test()
    {
         this.OnEventTransferInterrupted(this.CurrentStep, "Transfer not valid");
    }

    protected void OnEventTransferInterrupted(Step step, string errorMsg)
    {
        if (this.TransferInterruptedEvent != null)
        {
            this.TransferInterruptedEvent(this,new EventArgs<Tuple<object, string>>(new Tuple<object, string>(step, errorMsg)));
        }
    }
}

测试

var mock=new Mock<A>()
EventArgs<Tuple<S3Server.Step, string>>  mess;
mock.Object.TransferInterruptedEvent += Object_TransferInterruptedEvent1;
mock.Object.Test(); 

Assert.IsTrue(mess.Value.Item1 == S3Server.Step.TransferValidation);
Assert.IsTrue(mess.Value.Item2 == "Transfer not valid");

private void Object_TransferInterruptedEvent1(object sender, EventArgs<Tuple<object, string>> e) {
    mess=e;
}

Answer 1

设置模拟以调用基类。通过设置mock.CallBase = true;这将允许模拟框架分配事件订阅。

[TestMethod]
public void _MockEvent() {
    //Arrange
    var mock = new Mock<A>();
    mock.CallBase = true;
    EventArgs<Tuple<Step, string>> mess = null;

    mock.Object.TransferInterruptedEvent += delegate(object sender, EventArgs<Tuple<Step, string>> e) {
        mess = e;
    };

    //Act
    mock.Object.Test();

    //Assert
    Assert.IsNotNull(mess);
    Assert.IsTrue(mess.Value.Item1 == Step.TransferValidation);
    Assert.IsTrue(mess.Value.Item2 == "Transfer not valid");
}

如何使用Mock测试事件

1 个答案: