public async Task Navigate_Raises_NavigationStateChangedEvent()
{
var tcs = new TaskCompletionSource<bool>();
var eventAggregator = new EventAggregator();
eventAggregator.GetEvent<NavigationStateChangedEvent>().Subscribe((args) => tcs.SetResult(args.StateChange == StateChangeType.Forward));
await DispatcherHelper.ExecuteOnUIThread(() =>
{
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);
navigationService.Navigate("Mock", 1);
});
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.");
}
}
public async Task NavigateToCurrentViewModel_Calls_VieModel_OnNavigatedTo()
{
await ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame());
bool viewModelNavigatedToCalled = false;
var viewModel = new MockPageViewModel();
viewModel.OnNavigatedFromCommand = (a, b) => Assert.IsTrue(true);
viewModel.OnNavigatedToCommand = (parameter, navigationMode, frameState) =>
{
Assert.AreEqual(NavigationMode.New, navigationMode);
viewModelNavigatedToCalled = true;
};
// Set up the viewModel to the Page we navigated
frame.Navigated += (sender, e) =>
{
var view = frame.Content as FrameworkElement;
view.DataContext = viewModel;
};
var sessionStateService = new MockSessionStateService();
sessionStateService.GetSessionStateForFrameDelegate = (currentFrame) => new Dictionary<string, object>();
var navigationService = new FrameNavigationService(frame, (pageToken) => typeof(MockPage), sessionStateService);
navigationService.Navigate("Mock", 1);
Assert.IsTrue(viewModelNavigatedToCalled);
});
}
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);
});
}
public async Task Navigate_To_Invalid_Page()
{
await ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame());
var sessionStateService = new MockSessionStateService();
sessionStateService.GetSessionStateForFrameDelegate = (currentFrame) => new Dictionary<string, object>();
var navigationService = new FrameNavigationService(frame, (pageToken) => typeof(string), sessionStateService);
bool result = navigationService.Navigate("Mock", 1);
Assert.IsFalse(result);
Assert.IsNull(frame.Content);
});
}
public async Task Navigate_To_Valid_Page()
{
await ExecuteOnUIThread(() =>
{
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);
bool result = navigationService.Navigate("Mock", 1);
Assert.IsTrue(result);
Assert.IsNotNull(frame.Content);
Assert.IsInstanceOfType(frame.Content, typeof(MockPage));
Assert.AreEqual(1, ((MockPage)frame.Content).PageParameter);
});
}
public async Task Navigate_To_Page_With_Null_Aggregator_Still_Works()
{
await DispatcherHelper.ExecuteOnUIThread(() =>
{
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 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;
bool result = navigationService.Navigate("Mock", 1);
Assert.IsTrue(result);
});
}
public async Task NavigateFromCurrentViewModel_Calls_VieModel_OnNavigatedFrom()
{
await ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame());
bool viewModelNavigatedFromCalled = false;
var viewModel = new MockPageViewModel();
viewModel.OnNavigatedFromCommand = (frameState, suspending) =>
{
Assert.IsFalse(suspending);
viewModelNavigatedFromCalled = true;
};
var sessionStateService = new MockSessionStateService();
sessionStateService.GetSessionStateForFrameDelegate = (currentFrame) => new Dictionary<string, object>();
var navigationService = new FrameNavigationService(frame, (pageToken) => typeof(MockPage), sessionStateService);
// Initial navigatio
navigationService.Navigate("page0", 0);
// Set up the frame's content with a Page
var view = new MockPage();
view.DataContext = viewModel;
frame.Content = view;
// Navigate to fire the NavigatedToCurrentViewModel
navigationService.Navigate("page1", 1);
Assert.IsTrue(viewModelNavigatedFromCalled);
});
}
public async Task PageTokenThatCannotBeResolved_ThrowsMeaningfulException()
{
await ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame());
var sessionStateService = new MockSessionStateService();
var frameSessionState = new Dictionary<string, object>();
sessionStateService.GetSessionStateForFrameDelegate = (currentFrame) => frameSessionState;
Func<string, Type> unresolvablePageTokenReturnsNull = pageToken => null;
var navigationService = new FrameNavigationService(frame, unresolvablePageTokenReturnsNull, sessionStateService);
Assert.ThrowsException<ArgumentException>(
() => navigationService.Navigate("anything", 1)
);
});
}
public async Task RestoreSavedNavigation_ClearsOldForwardNavigation()
{
await ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame());
var sessionStateService = new MockSessionStateService();
var frameSessionState = new Dictionary<string, object>();
sessionStateService.GetSessionStateForFrameDelegate = (currentFrame) => frameSessionState;
var navigationService = new FrameNavigationService(frame, (pageToken) => typeof(MockPageWithViewModel), sessionStateService);
navigationService.Navigate("Page1", 1);
Assert.AreEqual(1, frameSessionState.Count, "VM 1 state only");
navigationService.Navigate("Page2", 2);
Assert.AreEqual(2, frameSessionState.Count, "VM 1 and 2");
navigationService.Navigate("Page3", 3);
Assert.AreEqual(3, frameSessionState.Count, "VM 1, 2, and 3");
navigationService.GoBack();
Assert.AreEqual(2, ((Dictionary<string, object>)frameSessionState["ViewModel-2"]).Count);
Assert.AreEqual(3, frameSessionState.Count, "VM 1, 2, and 3");
navigationService.Navigate("Page4", 4);
Assert.AreEqual(0, ((Dictionary<string,object>)frameSessionState["ViewModel-2"]).Count);
Assert.AreEqual(3, frameSessionState.Count, "VM 1, 2, and 4");
});
}
public async Task ViewModelOnNavigatedFromCalled_WithItsOwnStateDictionary()
{
await ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame());
var sessionStateService = new MockSessionStateService();
var frameSessionState = new Dictionary<string, object>();
sessionStateService.GetSessionStateForFrameDelegate = (currentFrame) => frameSessionState;
var navigationService = new FrameNavigationService(frame, (pageToken) => typeof(MockPageWithViewModel), sessionStateService);
navigationService.Navigate("Page1", 1);
Assert.AreEqual(1, frameSessionState.Count, "VM 1 state only");
navigationService.Navigate("Page2", 2);
Assert.AreEqual(2, frameSessionState.Count, "VM 1 and 2");
navigationService.Navigate("Page1", 1);
Assert.AreEqual(3, frameSessionState.Count, "VM 1, 2, and 1 again.");
navigationService.Navigate("Page3", 3);
Assert.AreEqual(4, frameSessionState.Count, "VM 1, 2, 1, and 3");
});
}
public async Task GoBack_When_CanGoBack()
{
await ExecuteOnUIThread(() =>
{
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);
bool resultFirstNavigation = navigationService.Navigate("MockPage", 1);
Assert.IsInstanceOfType(frame.Content, typeof(MockPage));
Assert.AreEqual(1, ((MockPage)frame.Content).PageParameter);
Assert.IsFalse(navigationService.CanGoBack());
bool resultSecondNavigation = navigationService.Navigate("Mock", 2);
Assert.IsInstanceOfType(frame.Content, typeof(MockPage));
Assert.AreEqual(2, ((MockPage)frame.Content).PageParameter);
Assert.IsTrue(navigationService.CanGoBack());
navigationService.GoBack();
Assert.IsInstanceOfType(frame.Content, typeof(MockPage));
Assert.AreEqual(1, ((MockPage)frame.Content).PageParameter);
Assert.IsFalse(navigationService.CanGoBack());
});
}
public async Task Resuming_Calls_ViewModel_OnNavigatedTo()
{
await ExecuteOnUIThread(() =>
{
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);
navigationService.Navigate("Mock", 1);
var viewModel = new MockPageViewModel();
viewModel.OnNavigatedToCommand = (navigationParameter, navigationMode, frameState) =>
{
Assert.AreEqual(NavigationMode.Refresh, navigationMode);
};
var page = (MockPage)frame.Content;
page.DataContext = viewModel;
navigationService.RestoreSavedNavigation();
});
}
public async Task Suspending_Calls_VieModel_OnNavigatedFrom()
{
await ExecuteOnUIThread(() =>
{
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);
navigationService.Navigate("Mock", 1);
var viewModel = new MockPageViewModel();
viewModel.OnNavigatedFromCommand = (frameState, suspending) =>
{
Assert.IsTrue(suspending);
};
var page = (MockPage)frame.Content;
page.DataContext = viewModel;
navigationService.Suspending();
});
}
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);
});
}
