public static void Run()
{
Console.WriteLine($"{Environment.NewLine}*** PUBLISH SUBSCRIBE PATTERN ***{Environment.NewLine}");
// Make a bike shop
IBikeShop shop = new BikeShop("Mountain Bike Guys");
BikeCustomer customerOne = new BikeCustomer(shop, "Tom");
BikeCustomer customerTwo = new BikeCustomer(shop, "Dick");
BikeCustomer customerThree = new BikeCustomer(shop, "Harry");
shop.NewBikeArrived("Road Runner");
shop.NewBikeArrived("GT");
customerOne.UnsubscribeFromNewBikeNotifications();
customerTwo.UnsubscribeFromNewBikeNotifications();
shop.NewBikeArrived("Rocket");
// We don't need to ubsubscribe the last customer (or any of them really)
// because they have the same scope as the object they subscribe to.
// Memory leaks only occur when objects the sunscriber object is disposed
// but's it's subscribtion in the subscribed object last on.
// This is a design problem and should be solved at design time.
}
public void BikeShop_NewBikeEventRaised_SubscriberIsCalled()
{
// Arrange
IBikeShop shop = new BikeShop("Shop");
BikeCustomer customerOne = new BikeCustomer(shop, "Customer");
using (StringWriter writer = new StringWriter())
{
// Capture the console output
Console.SetOut(writer);
// Act
shop.NewBikeArrived("Rocket");
// Assert
Assert.IsTrue(writer.ToString().Contains("Rocket"));
}
}