public void TestTwoScreens()
{
var ss = new ScreenStack();
Assert.AreEqual(null, ss.CurrentScreen);
var screen1 = new Screen();
var screen2 = new Screen();
ss.Push(screen1);
ss.Update(0);
Assert.AreSame(screen1, ss.CurrentScreen);
screen1.Push(screen2);
ss.Update(0);
Assert.AreSame(screen2, ss.CurrentScreen);
ss.Pop();
ss.Update(0);
Assert.AreSame(screen1, ss.CurrentScreen);
ss.Pop();
ss.Update(0);
Assert.AreEqual(null, ss.CurrentScreen);
Assert.Throws <InvalidOperationException>(ss.Pop);
}
public void PopScreenWhenEmptyTest()
{
// - Arrange
var screenStack = new ScreenStack();
// - Act & Assert
Assert.Throws <InvalidOperationException>(
() => screenStack.Pop());
}
public void TestOneScreen()
{
var ss = new ScreenStack();
Assert.AreEqual(null, ss.CurrentScreen);
var screen = new Screen();
ss.Push(screen);
ss.Update(0);
Assert.AreSame(screen, ss.CurrentScreen);
ss.Pop();
ss.Update(0);
Assert.AreEqual(null, ss.CurrentScreen);
}
public void Apply(Navigator navigator, ScreenStack screens)
{
var screen = screens.FirstOrDefault(e => e.GetType() == _screenType);
if (screen is null)
{
throw new ScreenNotFoundException(_screenType);
}
while (screens.CurrentScreen != screen)
{
screens.Pop();
}
navigator.BackToScreen(screen);
}
public void PopScreenTest()
{
// - Arrange
var screenA = new Mock <Screen>().Object;
var screenB = new Mock <Screen>().Object;
var screenStack = new ScreenStack();
screenStack.Push(screenA, screenB);
// - Act
var removedScreen = screenStack.Pop();
// - Assert
Assert.IsTrue(screenStack.IsRoot);
Assert.AreSame(screenA, screenStack.CurrentScreen);
Assert.AreSame(screenB, removedScreen);
CollectionAssert.DoesNotContain(screenStack, screenB);
Assert.AreEqual(1, screenStack.Count);
}
public void Apply(Navigator navigator, ScreenStack screens)
{
screens.Pop();
screens.Push(_screen);
navigator.Replace(_screen, _resolver);
}
public void Apply(Navigator navigator, ScreenStack screens)
{
screens.Pop();
navigator.Back();
}
