Expectations on method parameters

public void TouchIron(Iron iron)
{
    try {
        _hand.TouchIron(iron);
    }
    catch (BurnException) {
        _mouth.Yell();
    }
}

//test
[Test, Isolated]
public void TouchHotIron_Yell()
{
    var hand = Isolate.Fake.Instance<Hand>();
    var mouth = Isolate.Fake.Instance<Mouth>();
    Isolate.WhenCalled(() => hand.TouchIron(new Iron {IsHot = true})).WillThrow(new BurnException());

    var brain = new Brain(hand, mouth);
    brain.TouchIron(new Iron());

    Isolate.Verify.WasNotCalled(() => mouth.Yell());
}