private static void Observer()
{
var weatherStation = new WeatherStation();
weatherStation.Add(new TV());
weatherStation.Add(new CellPhone());
weatherStation.SetCurrentWeather(new WeatherPayload(10.5m));
weatherStation.SetCurrentWeather(new WeatherPayload(10.4m));
weatherStation.SetCurrentWeather(new WeatherPayload(10.6m));
}
public void Notify_Notifies()
{
WeatherStation s = new WeatherStation();
var observer = new TestObserver();
var observer2 = new TestObserver();
s.Add(observer);
s.Add(observer2);
s.ChangeWeather();
s.Notify();
Assert.True(observer.wasNotified);
Assert.True(observer2.wasNotified);
}
public static void Main(string[] args)
{
Console.WriteLine("Hello World");
WeatherStation wStation = new WeatherStation();
SmartPhone phone = new SmartPhone(wStation);
WebSite site = new WebSite(wStation);
wStation.Add(phone);
wStation.SetTemperature(12.3);
wStation.Add(site);
wStation.SetTemperature(13.2);
wStation.Remove(phone);
wStation.SetTemperature(11.9);
}
public void Add_AddsObserver()
{
WeatherStation s = new WeatherStation();
s.Add(new TestObserver());
Assert.Single(s.observers);
}
private static void Observer_Pattern()
{
// TODO The Observer pattern defines one to many dependencies between objects so that when one object changes its state
// TODO all of its dependencies are notified and updated automatically
var weatherStation = new WeatherStation();
IObserver phoneDisplay = new PhoneDisplay(weatherStation);
IObserver tabletDisplay = new TabletDisplay(weatherStation);
// push the observer in the list
weatherStation.Add(phoneDisplay);
weatherStation.Add(tabletDisplay);
Console.WriteLine("Observable Weather Station received new Temperature so it will update the observers");
//poll the date from observable for each observer in the list
weatherStation.Notify();
}
static void Main(string[] args)
{
WeatherStation station = new WeatherStation();
PrintMediaDisplay printMediaDisplay = new PrintMediaDisplay(station);
NewsChannelDisplay newsChannelDisplay = new NewsChannelDisplay(station);
station.Add(printMediaDisplay);
station.Add(newsChannelDisplay);
var timer = new System.Threading.Timer((e) =>
{
station.Notify();
}, null, TimeSpan.Zero, TimeSpan.FromSeconds(10));
Console.ReadKey();
}
public void Remove_RemovesObserver()
{
WeatherStation s = new WeatherStation();
var observer = new TestObserver();
s.Add(observer);
s.Remove(observer);
Assert.Empty(s.observers);
}