public void ShouldGetRubberDuckCanSwimButNotFlyAndSqueakQuack()
        {
            var quack = new RubberDuck();

            quack.SetFlyBehaviour(new FlyNoWay());

            quack.SetQuackBehaviour(new Squeak());

            quack.Display();

            quack.PerformQuack();

            quack.Swim();

            quack.Display();
        }