检查用Moq调用CancellationTokenSource.Cancel（） [英] Checking that CancellationTokenSource.Cancel() was invoked with Moq

问题描述

我有一条条件语句，其内容应如下所示：

I have a conditional statement which should looks as follows:

//...
if(_view.VerifyData != true)
{
    //...
}
else
{
    _view.PermanentCancellation.Cancel();
}

其中PermanentCancellation类型为CancellationTokenSource。

where PermanentCancellation is of type CancellationTokenSource.

我想知道如何在_view的模拟中设置它。到目前为止，所有尝试均失败了：(我无法在google上找到示例。

Im wondering how i should set this up in my mock of _view. All attempts thus far have failed :( and i cant find an example on google.

任何指针都会受到赞赏。

Any pointers would be appreciated.

推荐答案

因为 CancellationTokenSource.Cancel

Because CancellationTokenSource.Cancel is not virtual you cannot mock it with moq.

您有两个选择：

创建包装器接口：

public interface ICancellationTokenSource
{
    void Cancel();
}

以及将委派给包装的CancellationTokenSource的实现

and an implementation which delegates to the wrapped CancellationTokenSource

public class CancellationTokenSourceWrapper : ICancellationTokenSource
{
    private readonly CancellationTokenSource source;

    public CancellationTokenSourceWrapper(CancellationTokenSource source)
    {
        this.source = source;
    }

    public void Cancel() 
    {
        source.Cancel();
    }

}

并使用 ICancellationTokenSource 作为 PermanentCancellation ，然后您可以在测试中创建 Mock< ICancellationTokenSource> ：

And use the ICancellationTokenSource as PermanentCancellation then you can create an Mock<ICancellationTokenSource> in your tests:

// arrange

var mockCancellationTokenSource = new Mock<ICancellationTokenSource>();
viewMock.SetupGet(m => m.PermanentCancellation)
        .Returns(mockCancellationTokenSource.Object)

// act

// do something

// assert

mockCancellationTokenSource.Verify(m => m.Cancel());

并在生产代码中使用 CancellationTokenSourceWrapper 。

And use the CancellationTokenSourceWrapper in your production code.

或使用支持模拟非虚拟成员的模拟框架，例如：

Or use a mocking framework which supports mocking non virtual members like:

• Microsoft假货


• < a href = http://www.typemock.com/isolator-product-page rel = nofollow> Typemock隔离器（商业）


• JustMock （商业）

• Microsoft Fakes
• Typemock isolator (commercial)
• JustMock (commercial)

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