static void Main(string[] args)
{
IFlyBehaviour flyNoWay = new FlyNoWay();
IFlyBehaviour flyWithWings = new FlyWithWings();
Duck mallardDuck = new MallardDuck();
mallardDuck.SetFlyBehaviour(flyWithWings);
Duck redheadDuck = new RedheadDuck();
redheadDuck.SetFlyBehaviour(flyWithWings);
Duck rubberDuck = new RubberDuck();
rubberDuck.SetFlyBehaviour(flyNoWay);
Duck decoyDuck = new DecoyDuck();
decoyDuck.SetFlyBehaviour(flyNoWay);
List <Duck> listDucks = new List <Duck>
{
mallardDuck,
redheadDuck,
rubberDuck,
decoyDuck
};
foreach (var duck in listDucks)
{
duck.Fly();
}
}
public void ShouldGetRubberDuckCanSwimButNotFlyAndSqueakQuack()
{
var quack = new RubberDuck();
quack.SetFlyBehaviour(new FlyNoWay());
quack.SetQuackBehaviour(new Squeak());
quack.Display();
quack.PerformQuack();
quack.Swim();
quack.Display();
}
internal static void ExecuteStrategy()
{
//Intent
// • Define a family of algorithms, encapsulate each one, and make them interchangeable.Strategy lets the algorithm vary independently from
// the clients that use it.
// • Capture the abstraction in an interface, bury implementation details in derived classes.
Strategy.Duck greenDuck = new GreenDuck();
greenDuck.PerformFly();
greenDuck.PerformQuack();
Strategy.Duck rubberDuck = new RubberDuck();
rubberDuck.PerformFly();
rubberDuck.PerformQuack();
rubberDuck.SetFlyBehaviour(new FlyWithRockets()); // Changing behaviour at runtime !
rubberDuck.PerformFly();
}