CODEWITHSUNDEEP
c#unit-testingmoq
Garry A
Garry A

Reputation: 465

Moq in .Net with 2 parameters

I am trying to create a Mock to run my tests but I am getting the following error, "Invalid callback. Setup on method with 2 parameter(s) cannot invoke callback with different number of parameters (1)" Here's my Setup function 

  private void Setup()
    {
        this.dataFactoryMock = new Mock<CommonDataFactory>();
        var commonDataFactory = new CommonDataFactory();
        this.dataFactoryMock.Setup(factory => factory.Factory(It.IsAny<DateTime>(), It.IsAny<DateTime>())).Returns<DateTime>(date => commonDataFactory.Factory(date, date));
    }

public class CommonDataFactory
{
    public virtual CommonData Factory(DateTime adjustedAnalysisDate, DateTime analysisDate)
    {            
        var downloadCommonData = CommonData.DownloadCommonData(adjustedAnalysisDate, analysisDate);
        this.cache.Add(key, downloadCommonData, new CacheItemPolicy());
        return downloadCommonData;
    }
}

If I use only one parameter in the Factory it works fine. Can someone help please?

Upvotes: 7

Views: 3097

Answers (1)

Nkosi
Nkosi

Reputation: 247591

The expression used in the Returns needs to match the number of matchers used in the setup

There were two date-time argument matchers in the setup so there needs to be two used in the returns expression.

this.dataFactoryMock
    .Setup(factory => factory.Factory(It.IsAny<DateTime>(), It.IsAny<DateTime>()))
    .Returns((DateTime adjustedAnalysisDate, DateTime analysisDate) => 
        commonDataFactory.Factory(adjustedAnalysisDate, analysisDate)
    );

Upvotes: 11

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