public void FindScreens()
{
//create teh screenstack
var screenStack = new ScreenStack();
//add three test screens
screenStack.Screens.Add(new Screen1());
screenStack.Screens.Add(new Screen2());
screenStack.Screens.Add(new Screen3());
var screens = screenStack.FindScreens <ITest>();
Assert.AreEqual(2, screens.Count());
Assert.AreEqual(1, screens.Where(x => x.ScreenName == "First").Count());
Assert.AreEqual(1, screens.Where(x => x.ScreenName == "Second").Count());
Assert.AreEqual(0, screens.Where(x => x.ScreenName == "Third").Count());
}
