public void TestRegisterAddsObserverToObserverList()
{
CoinReturn coinReturn = new CoinReturn();
MockCoinReturnObserver mockCoinReturnObserver = new MockCoinReturnObserver();
coinReturn.RegisterObserver(mockCoinReturnObserver);
Assert.AreEqual(1, coinReturn.Observers.Count);
Assert.AreEqual(mockCoinReturnObserver, coinReturn.Observers[0]);
}
public void TestClearCallsCoinReturnUpdatedOnObservers()
{
CoinReturn coinReturn = new CoinReturn();
MockCoinReturnObserver mockCoinReturnObserverOne = new MockCoinReturnObserver();
MockCoinReturnObserver mockCoinReturnObserverTwo = new MockCoinReturnObserver();
coinReturn.RegisterObserver(mockCoinReturnObserverOne);
coinReturn.RegisterObserver(mockCoinReturnObserverTwo);
coinReturn.Clear();
Assert.AreEqual(1, mockCoinReturnObserverOne.NumberOfTimesCoinPurseUpdatedCalled);
Assert.AreEqual(1, mockCoinReturnObserverTwo.NumberOfTimesCoinPurseUpdatedCalled);
}
