public async void StopAutoPageDisposal_ShouldNotDisposeWhenPopped()
{
// creating the test page/viewmodel
var page = new TestPage();
var testViewModel = new TestViewModel();
page.BindingContext = testViewModel;
// adding a main page to the navigation stack, because the root will not be popped
var navigation = new AutoNavigationPage(new Page());
//start the automatic disposal
navigation.StartAutoPageDisposal();
//push the test page onto the navigation stack
await navigation.PushAsync(page);
// stop the autmatic disposal
navigation.StopAutoPageDisposal();
//pop the test page from the navigation stack
await navigation.PopAsync();
// Assert that both page and viewmodel did not call their Dispose method.
Assert.False(testViewModel.IsDisposed);
Assert.False(page.IsDisposed);
}
public async void StartAutoSubscribing_ShouldGarbageCollectPageAndBindingContext()
{
var navPage = new AutoNavigationPage(new Page());
navPage.RegisterAction("TestAction2")
.Pop();
var subPage = new Page();
var testViewModel = new TestViewModel();
subPage.BindingContext = testViewModel;
await navPage.Navigation.PushAsync(subPage);
await testViewModel.InvokeRequest("TestAction2");
WeakReference pageReference = new WeakReference(subPage);
WeakReference contextReference = new WeakReference(testViewModel);
subPage = null;
testViewModel = null;
//give controle to another thread to clean up the navigation stack properly,
//if not the page/context wont be collected
await Task.Delay(1);
GC.Collect();
Assert.False(contextReference.IsAlive);
Assert.False(pageReference.IsAlive);
}
public async void RegisterAction_ShouldRegisterAction()
{
var navigationPage = new AutoNavigationPage(new Page());
string actionName = "actionName";
navigationPage.RegisterAction(actionName);
Exception exc = await Record.ExceptionAsync(() => navigationPage.Navigation.ExecuteAction(actionName));
Assert.Null(exc);
}
public async void RegisterContainer_ShouldExecuteActionsFromContainer()
{
var navPage = new AutoNavigationPage(new Page());
await navPage.Navigation.PushAsync(new Page());
await navPage.Navigation.PushAsync(new Page());
navPage.RegisterContainer <TestContainer>();
Assert.Equal(3, navPage.Navigation.NavigationStack.Count);
await navPage.Navigation.ExecuteAction("ContainerAction");
Assert.Equal(1, navPage.Navigation.NavigationStack.Count);
}
public async void StartAutoSubscribing_ShouldAutoSubscribenewPages()
{
var navPage = new AutoNavigationPage(new Page());
navPage.RegisterAction("TestAction")
.Pop();
var subPage = new Page();
var testViewModel = new TestViewModel();
subPage.BindingContext = testViewModel;
await navPage.Navigation.PushAsync(subPage);
Assert.Equal(2, navPage.Navigation.NavigationStack.Count);
await testViewModel.InvokeRequest("TestAction");
Assert.Equal(1, navPage.Navigation.NavigationStack.Count);
}
public async void StartAutoPageDisposal_ShouldDisposeWhenRemoved()
{
// creating the test page/viewmodel
var page = new TestPage();
var testViewModel = new TestViewModel();
page.BindingContext = testViewModel;
// adding a main page to the navigation stack, because the root will not be popped
var navigation = new AutoNavigationPage(new Page());
//push the test page onto the navigation stack
await navigation.PushAsync(page);
//start the automatic disposal
navigation.StartAutoPageDisposal();
// remove the page
navigation.Navigation.RemovePage(page);
// Assert that both page and viewmodel called their Dispose methods.
Assert.True(testViewModel.IsDisposed);
Assert.True(page.IsDisposed);
}
