Question

interface ISample
{
    int Sum(int a,int b);
    int Multiplication(int x,int a,int b);
}

class Sample
{
    public int Sum(int a,int b)
    {
        return a+b;
    }

    public int Multiplication(int x,int a,int b)
   {
       return x*Sum(a,b);
   }
}

I want to test the Multiplication method. But To test the method of Multiplication , sum method need to mocking. How do i mock Sum method ? Is it possible that something like this?

Answer 1

As other said you can use seperate interfaces . For Example

interface ISum{

   int Sum(int a, int b);
}

interface ISample
{
    int Multiplication(int x, int a, int b);
}

public class Sample : ISample
{
   ISum _sum;
    public Sample(ISum sum)
    {
      _sum = sum;
    }

   int Multiplication(int x, int a, int b)
   {
       return x*_sum.Sum(a,b);
   }
}

In your testing code:

[TestFixture]
public class TestSample
{
    [Test]
    public void TestSample()
    {
        var mockSum = new Mock<ISum>();
        mockSum.Setup(); // fill this what you want
        var sampleObj = new SampleObj(mockSum.Object);
        //Do Some Asserts
    }

}