static void Main(string[] args)
{
var wdIn = new WeatherData();
var wdOut = new WeatherDataPro();
var display = new Display(wdIn, wdOut);
var statsDisplay = new StatsDisplay(wdIn, wdOut);
wdIn.UpdateWeatherInfo(3, 0.7, 760);
wdIn.UpdateWeatherInfo(4, 0.8, 761);
wdOut.UpdateWeatherInfo(4, 0.8, 761, 90, 11);
wdOut.UpdateWeatherInfo(4, 0.8, 761, 270, 10);
wdIn.RemoveObserver(statsDisplay);
wdOut.RemoveObserver(statsDisplay);
wdIn.UpdateWeatherInfo(10, 0.8, 761);
}
public void UpdateWeatherInfo_StatsDisplayIsSubscriber_StatsDisplayCalledTwoTimes()
{
// Arrange
var statsDisplayCalledCount = 0;
var wdIn = new WeatherData();
var wdOut = new WeatherDataPro();
var statsDisplayMock = new Mock <StatsDisplay>(wdIn, wdOut);
wdIn.RegisterObserver(statsDisplayMock.Object);
wdOut.RegisterObserver(statsDisplayMock.Object);
statsDisplayMock
.Setup(d => d.Update(It.IsAny <IObservable <WeatherInfo> >(), It.IsAny <WeatherInfo>()))
.Callback(() => ++ statsDisplayCalledCount);
// Act
wdIn.UpdateWeatherInfo(3, 0.7, 760);
wdOut.UpdateWeatherInfo(4, 0.8, 761, 10, 10);
// Assert
Assert.Equal(2, statsDisplayCalledCount);
}