MOQ: Returning value that was passed into a method

Question

I have a method on an interface:

string DoSomething(string whatever);

I want to mock this with MOQ, so that it returns whatever was passed in - something like:

_mock.Setup( theObject => theObject.DoSomething( It.IsAny<string>( ) ) )
   .Returns( [the parameter that was passed] ) ;

Any ideas?

Answer 1

You can use a lambda with an input parameter, like so:

.Returns((string myval) => { return myval; });

Answer 2

You should be able to do something similar to this

Answer 3

You can do this:

string parameter;
_mock.Setup( theObject => theObject.DoSomething( parameter ) ).Returns(parameter);