public void EmitsCorrectlyWhenPresentedOnBackPressed()
{
var detail = new BackButtonPage();
var master = new BackButtonPage {
Title = "Master"
};
var mdp = new MasterDetailPage {
Detail = detail,
Master = master,
IsPresented = true,
IsPlatformEnabled = true,
};
((IMasterDetailPageController)mdp).BackButtonPressed += (sender, args) => {
args.Handled = mdp.IsPresented;
mdp.IsPresented = false;
};
var detailEmitted = false;
var masterEmitted = false;
detail.BackPressed += (sender, args) => detailEmitted = true;
master.BackPressed += (sender, args) => masterEmitted = true;
var result = mdp.SendBackButtonPressed();
Assert.True(masterEmitted);
Assert.False(detailEmitted);
Assert.True(result);
}
public void SendsBackButtonEventToCurrentPage()
{
var current = new BackButtonPage();
var navPage = new NavigationPage(current);
var emitted = false;
current.BackPressed += (sender, args) => emitted = true;
navPage.SendBackButtonPressed();
Assert.True(emitted);
}
public void DoesNotSendBackEventToNonCurrentPage()
{
var current = new BackButtonPage();
var navPage = new NavigationPage(current);
navPage.PushAsync(new ContentPage());
var emitted = false;
current.BackPressed += (sender, args) => emitted = true;
navPage.SendBackButtonPressed();
Assert.False(emitted);
}
public async Task DoesNotNavigatesBackWhenBackButtonPressedIfHandled()
{
var root = new BackButtonPage {
Title = "Root"
};
var second = new BackButtonPage()
{
Handle = true
};
var navPage = new NavigationPage(root);
await navPage.PushAsync(second);
navPage.SendBackButtonPressed();
Assert.AreEqual(second, navPage.CurrentPage);
}
