public async Task Set_State_Empty_Back_Button_Collapsed()
{
await DispatcherHelper.ExecuteOnUIThread(() =>
{
var eventAggregator = new EventAggregator();
var frame = new FrameFacadeAdapter(new Frame(), eventAggregator);
var sessionStateService = new MockSessionStateService();
sessionStateService.GetSessionStateForFrameDelegate = (currentFrame) => new Dictionary <string, object>();
var navigationService = new FrameNavigationService(frame, (pageToken) => typeof(MockPage), sessionStateService);
var deviceGestureService = new DeviceGestureService(eventAggregator);
deviceGestureService.UseTitleBarBackButton = true;
var navigationManager = SystemNavigationManager.GetForCurrentView();
// Reset back button visibility before running, can't do this in TestInitialize because CoreWindow sometimes isn't ready
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
Assert.AreEqual(AppViewBackButtonVisibility.Collapsed, navigationManager.AppViewBackButtonVisibility);
navigationService.Navigate("Mock", 1);
Assert.AreEqual(AppViewBackButtonVisibility.Collapsed, navigationManager.AppViewBackButtonVisibility);
navigationService.Navigate("Mock", 2);
Assert.AreEqual(AppViewBackButtonVisibility.Visible, navigationManager.AppViewBackButtonVisibility);
frame.SetNavigationState("1,0");
Assert.AreEqual(AppViewBackButtonVisibility.Collapsed, navigationManager.AppViewBackButtonVisibility);
});
}
public async Task Set_State_Raises_NavigationStateChangedEvent()
{
var tcs = new TaskCompletionSource <bool>();
var eventAggregator = new EventAggregator();
eventAggregator.GetEvent <NavigationStateChangedEvent>().Subscribe((args) => tcs.SetResult(true));
await DispatcherHelper.ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame(), eventAggregator);
frame.SetNavigationState("1,0");
});
await Task.WhenAny(tcs.Task, Task.Delay(200));
if (tcs.Task.IsCompleted)
{
Assert.IsTrue(tcs.Task.Result);
}
else
{
Assert.Fail("NavigationStateChangedEvent event wasn't raised within 200 ms.");
}
}