Rhino Mocks: How to return conditional result from a mock object method

Question

I would like to do something like the following but can't seem to get the syntax for the Do method quite right.

var sqr = new _mocks.CreateRenderer<ShapeRenderer>();
Expect.Call(sqr.CanRender(null)).IgnoreArguments().Do(x =>x.GetType() == typeof(Square)).Repeat.Any();

So basically, I would like to set up the sqr.CanRender() method to return true if the input is of type Square and false otherwise.

Answer 1

Are you looking for this?

Expect.Call(sqr.CanRender(null)).IgnoreArguments()
    .Do((Func<Shape, bool>) delegate(Agent x){return x.GetType() == typeof(Square);})
    .Repeat.Any();

EDIT: The answer was correct in spirit bu the original syntax did not quite work.