public void ShouldNotifyObserversOfGameResult()
{
var subject = new SportsAggregator();
var observer1 = new NewsPaper();
var observer2 = new RadioStation();
subject.RegisterObserver(observer1);
subject.RegisterObserver(observer2);
var gameResult = new GameResult
{
GameDate = DateTime.Now,
LosingScore = 1,
LosingTeam = "Chicago Cubs",
WinningScore = 5,
WinningTeam = "Cincinnati Reds"
};
subject.AddGameResult(gameResult);
Assert.Equal(1, observer1.Results.Count);
Assert.Equal(1, observer2.Results.Count);
Assert.Same(gameResult, observer1.Results[0]);
Assert.Same(gameResult, observer2.Results[0]);
subject.UnregisterObserver(observer1);
subject.UnregisterObserver(observer2);
Assert.Equal(0, subject.Observers.Count);
}
public void DoesntHandleNullObjectsCorrectly()
{
var subject = new SportsAggregator();
var observer1 = new NewsPaper();
var observer2 = new RadioStation();
subject.RegisterObserver(observer1);
subject.RegisterObserver(observer2);
observer1 = null;
GC.Collect();
GC.WaitForPendingFinalizers();
var gameResult = new GameResult
{
GameDate = DateTime.Now,
LosingScore = 1,
LosingTeam = "Chicago Cubs",
WinningScore = 5,
WinningTeam = "Cincinnati Reds"
};
subject.AddGameResult(gameResult);
subject.UnregisterObserver(observer2);
//subject.UnregisterObserver(observer1);
Assert.Equal(1, subject.Observers.Count);
}
public void SportsAggregator_AddGameResult()
{
// Arrange
var subject = new SportsAggregator();
var observer1 = new NewsPaper();
var observer2 = new RadioStation();
subject.RegisterObserver(observer1);
subject.RegisterObserver(observer2);
var gameResult = new GameResult
{
GameDate = DateTime.Now,
LosingScore = 1,
LosingTeam = "Mariners",
WinningScore = 10,
WinningTeam = "Astros"
};
// Action
subject.AddGameResult(gameResult);
// Assert
Assert.AreEqual(1, observer1.Results.Count);
Assert.AreEqual(1, observer2.Results.Count);
Assert.AreSame(gameResult, observer1.Results[0]);
Assert.AreSame(gameResult, observer2.Results[0]);
// Action
subject.UnregisterObserver(observer1);
subject.UnregisterObserver(observer2);
Assert.IsFalse(subject.Observers.Any());
}