public async Task Navigate_To_Valid_Page()
{
await ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame());
var frameSessionState = new MockFrameSessionState();
frameSessionState.GetSessionStateForFrameDelegate = (currentFrame) => new Dictionary<string, object>();
var restorableStateService = new MockSuspensionManagerState();
var navigationService = new FrameNavigationService(frame, frameSessionState, (pageToken) => typeof(MockPage), restorableStateService);
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 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);
Assert.AreEqual(1, frameState["someValue"]);
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 frameSessionState = new MockFrameSessionState();
frameSessionState.GetSessionStateForFrameDelegate = (currentFrame) =>
{
var toReturn = new Dictionary<string, object>();
toReturn.Add("someValue", 1);
return toReturn;
};
var restorableStateService = new MockSuspensionManagerState();
var navigationService = new FrameNavigationService(frame, frameSessionState, (pageToken) => typeof(MockPage), restorableStateService);
navigationService.Navigate("Mock", 1);
Assert.IsTrue(viewModelNavigatedToCalled);
});
}
public async Task GoBack_When_CanGoBack()
{
await ExecuteOnUIThread(() =>
{
var frame = new FrameFacadeAdapter(new Frame());
var frameSessionState = new MockFrameSessionState();
frameSessionState.GetSessionStateForFrameDelegate = (currentFrame) => new Dictionary<string, object>();
var suspensionManagerState = new MockSuspensionManagerState();
var navigationService = new FrameNavigationService(frame, frameSessionState, (pageToken) => typeof(MockPage), suspensionManagerState);
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 frameSessionState = new MockFrameSessionState();
frameSessionState.GetSessionStateForFrameDelegate = (currentFrame) =>
{
var toReturn = new Dictionary<string, object>();
toReturn.Add("someValue", 1);
return toReturn;
};
var restorableStateService = new MockSuspensionManagerState();
var navigationService = new FrameNavigationService(frame, frameSessionState, (pageToken) => typeof(MockPage), restorableStateService);
navigationService.Navigate("Mock", 1);
var viewModel = new MockPageViewModel();
viewModel.OnNavigatedToCommand = (navigationParameter, navigationMode, frameState) =>
{
Assert.AreEqual(NavigationMode.Refresh, navigationMode);
Assert.AreEqual(1, frameState["someValue"]);
};
var page = (MockPage)frame.Content;
page.DataContext = viewModel;
navigationService.RestoreSavedNavigation();
});
}
