public async Task Navigate_To_Subsequent_Page_Back_Button_Visible()
{
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);
});
}
/// <summary>
/// Creates the device gesture service.
/// </summary>
/// <returns>The initialized device gesture service.</returns>
private IDeviceGestureService CreateDeviceGestureService()
{
var deviceGestureService = OnCreateDeviceGestureService();
if (deviceGestureService == null)
{
deviceGestureService = new DeviceGestureService(EventAggregator);
deviceGestureService.UseTitleBarBackButton = true;
}
return deviceGestureService;
}
/// <summary>
///
/// </summary>
/// <returns></returns>
protected virtual IDeviceGestureService CreateDeviceGestureService()
{
DeviceGestureService deviceGestureService = new DeviceGestureService();
deviceGestureService.UseTitleBarBackButton = true;
return deviceGestureService;
}
public async Task Navigate_To_Page_With_UseTitleBarBackButton_False_Does_Not_Change_Back_Button_Visibility()
{
await DispatcherHelper.ExecuteOnUIThread(() =>
{
var eventAggregator = new EventAggregator();
var frame = new FrameFacadeAdapter(new Frame());
var sessionStateService = new MockSessionStateService();
sessionStateService.GetSessionStateForFrameDelegate = (currentFrame) => new Dictionary<string, object>();
var navigationService = new FrameNavigationService(frame, (pageToken) => typeof(MockPage), sessionStateService);
var deviceGestureService = new DeviceGestureService();
deviceGestureService.EnableTitleBarBackButton(eventAggregator);
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;
// If it's collapsed and we navigate, it stays collapsed
Assert.AreEqual(AppViewBackButtonVisibility.Collapsed, navigationManager.AppViewBackButtonVisibility);
navigationService.Navigate("Mock", 1);
Assert.AreEqual(AppViewBackButtonVisibility.Collapsed, navigationManager.AppViewBackButtonVisibility);
// If it's visible and our back stack is emptied, it stays visible
navigationManager.AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
navigationService.ClearHistory();
Assert.AreEqual(AppViewBackButtonVisibility.Visible, navigationManager.AppViewBackButtonVisibility);
});
}