unit test a method that calls wcf service

Question

How do I unit test a Business Layer method that makes call to WCF service?

example:

public void SendData(DataUnit dataUnit)
{

        //this is WCF call         


        

Answer 1

You should separate your service call from your business layer:

Using the demo below, your Business Layer method that you listed would now look like this:

public void SendData(IMyInterface myInterface, DataUnit dataUnit)
{

        myInterface.SomeMethod(dataUnit);

}

Pass in a RealThing if you want to do the service call, pass in a TestThing if you just want to run a test:

public interface IMyInterface
{
   void SomeMethod(DataUnit x);
}

public class RealThing : IMyInterface
{
   public void SomeMethod(DataUnit x)
   {
       SomeServiceClient svc = new SomeServiceClient();
       svc.SomeMethod(x);
   }
}

public class TestThing : IMyInterface
{
   public void SomeMethod(DataUnit x)
   {
       // do your test here
   }
}