public async Task CantGoPastEnd()
{
var controller = new WalkthroughController(mockView.Object, onePageList);
await controller.ChangePageForwards();
Assert.AreEqual(0, controller.CurrentPage);
}
public void FirstPageValuesCorrect()
{
var controller = new WalkthroughController(mockView.Object, threePageList);
Assert.AreEqual(0, controller.CurrentPage);
Assert.AreEqual(3, controller.PageCount);
Assert.IsTrue(controller.OnFirstPage);
Assert.IsFalse(controller.OnLastPage);
Assert.IsFalse(controller.BackIsVisible);
Assert.IsTrue(controller.NextIsVisible);
}
public async Task LastPageValuesCorrect()
{
var controller = new WalkthroughController(mockView.Object, twoPageList);
await controller.ChangePageForwards();
Assert.AreEqual(1, controller.CurrentPage);
Assert.AreEqual(2, controller.PageCount);
Assert.IsFalse(controller.OnFirstPage);
Assert.IsTrue(controller.OnLastPage);
Assert.IsTrue(controller.BackIsVisible);
Assert.IsFalse(controller.NextIsVisible);
}
public async Task FastPageChangeIgnored()
{
mockView.Setup(m => m.ChangePage(true)).Returns(Task.Delay(10));
var controller = new WalkthroughController(mockView.Object, threePageList);
await Task.WhenAll(
controller.ChangePageForwards(),
controller.ChangePageForwards()
);
Assert.AreEqual(1, controller.CurrentPage);
mockView.Verify(m => m.ChangePage(true), Times.Exactly(1));
}
