public void ApplyBackToScreenButScreenNotFoundTest()
{
// - Arrange
var screenType = typeof(ScreenStub);
var screenStack = new ScreenStack();
var navigatorMock = new Mock <Navigator>();
var command = new BackToScreenNavCommand(screenType);
// - Act
var exception = Assert.Throws <ScreenNotFoundException>(
() => command.Apply(navigatorMock.Object, screenStack));
Assert.AreEqual(screenType, exception !.ScreenClass.Type);
navigatorMock.Verify(it => it.BackToScreen(It.IsAny <Screen>()), Times.Never);
}
public void ApplyBackToScreenCommandTest()
{
// - Arrange
var screenType = typeof(ScreenStub);
var screenStack = new ScreenStack();
var expectedScreen = new ScreenStub();
var screen = new Mock <Screen>().Object;
screenStack.Push(expectedScreen, screen, screen);
var navigatorMock = new Mock <Navigator>();
var command = new BackToScreenNavCommand(screenType);
// - Act
command.Apply(navigatorMock.Object, screenStack);
// - Assert
Assert.AreEqual(1, screenStack.Count);
Assert.AreEqual(expectedScreen, screenStack.CurrentScreen);
navigatorMock.Verify(it => it.BackToScreen(expectedScreen), Times.Once);
}
