@ -2,6 +2,7 @@ using System;
using System.Collections.Generic ;
using System.Collections.ObjectModel ;
using System.Linq ;
using System.Reflection ;
using System.Runtime.CompilerServices ;
using System.Threading ;
using System.Threading.Tasks ;
@ -21,6 +22,7 @@ using Avalonia.Markup.Xaml;
using Avalonia.Platform ;
using Avalonia.Styling ;
using Avalonia.UnitTests ;
using Avalonia.VisualTree ;
using Moq ;
using Xunit ;
@ -913,6 +915,165 @@ namespace Avalonia.Controls.UnitTests
Times . Once ) ;
}
[Fact]
public void Interrupted_PageTransition_Can_Select_Original_Control_Before_Previous_Transition_Completes ( )
{
using var app = Start ( ) ;
var firstPage = new ContentPage { Content = "Alpha" } ;
var secondPage = new ContentPage { Content = "Beta" } ;
var starts = new List < ( object? FromContent , object? ToContent , bool Forward ) > ( ) ;
var transitionGate = new TaskCompletionSource ( ) ;
var transition = new Mock < IPageTransition > ( ) ;
transition
. Setup ( t = > t . Start (
It . IsAny < Visual ? > ( ) , It . IsAny < Visual ? > ( ) ,
It . IsAny < bool > ( ) , It . IsAny < CancellationToken > ( ) ) )
. Callback < Visual ? , Visual ? , bool , CancellationToken > ( ( from , to , forward , _ ) = >
{
starts . Add ( (
( from as ContentPresenter ) ? . Content ,
( to as ContentPresenter ) ? . Content ,
forward ) ) ;
} )
. Returns ( transitionGate . Task ) ;
var target = new TabControl
{
PageTransition = transition . Object ,
Items =
{
new TabItem { Name = "first" , Content = firstPage } ,
new TabItem { Name = "second" , Content = secondPage } ,
} ,
} ;
var root = CreateRoot ( target ) ;
root . LayoutManager . ExecuteInitialLayoutPass ( ) ;
target . SelectedIndex = 1 ;
root . LayoutManager . ExecuteLayoutPass ( ) ;
Assert . Single ( starts ) ;
Assert . Same ( firstPage , starts [ 0 ] . FromContent ) ;
Assert . Same ( secondPage , starts [ 0 ] . ToContent ) ;
Assert . True ( starts [ 0 ] . Forward ) ;
var exception = Record . Exception ( ( ) = > target . SelectedIndex = 0 ) ;
Assert . Null ( exception ) ;
root . LayoutManager . ExecuteLayoutPass ( ) ;
Assert . Equal ( 2 , starts . Count ) ;
Assert . Null ( starts [ 1 ] . FromContent ) ;
Assert . Same ( firstPage , starts [ 1 ] . ToContent ) ;
Assert . False ( starts [ 1 ] . Forward ) ;
Assert . Same ( firstPage , target . SelectedContent ) ;
}
[Fact]
public void Pending_PageTransition_Can_Select_Original_Control_Before_Transition_Starts ( )
{
using var app = Start ( ) ;
var firstPage = new ContentPage { Content = "Alpha" } ;
var secondPage = new ContentPage { Content = "Beta" } ;
var starts = new List < ( object? FromContent , object? ToContent , bool Forward ) > ( ) ;
var transition = new Mock < IPageTransition > ( ) ;
transition
. Setup ( t = > t . Start (
It . IsAny < Visual ? > ( ) , It . IsAny < Visual ? > ( ) ,
It . IsAny < bool > ( ) , It . IsAny < CancellationToken > ( ) ) )
. Callback < Visual ? , Visual ? , bool , CancellationToken > ( ( from , to , forward , _ ) = >
{
starts . Add ( (
( from as ContentPresenter ) ? . Content ,
( to as ContentPresenter ) ? . Content ,
forward ) ) ;
} )
. Returns ( Task . CompletedTask ) ;
var target = new TabControl
{
PageTransition = transition . Object ,
Items =
{
new TabItem { Name = "first" , Content = firstPage } ,
new TabItem { Name = "second" , Content = secondPage } ,
} ,
} ;
var root = CreateRoot ( target ) ;
root . LayoutManager . ExecuteInitialLayoutPass ( ) ;
target . SelectedIndex = 1 ;
var exception = Record . Exception ( ( ) = > target . SelectedIndex = 0 ) ;
Assert . Null ( exception ) ;
root . LayoutManager . ExecuteLayoutPass ( ) ;
Assert . Single ( starts ) ;
Assert . Null ( starts [ 0 ] . FromContent ) ;
Assert . Same ( firstPage , starts [ 0 ] . ToContent ) ;
Assert . False ( starts [ 0 ] . Forward ) ;
Assert . Same ( firstPage , target . SelectedContent ) ;
}
[Fact]
public void Interrupted_PageTransition_Clears_Reused_Control_From_Owning_SelectedContentHost ( )
{
using var app = Start ( ) ;
var firstPage = new ContentPage { Content = "Alpha" } ;
var secondPage = new ContentPage { Content = "Beta" } ;
var transition = new Mock < IPageTransition > ( ) ;
transition
. Setup ( t = > t . Start (
It . IsAny < Visual ? > ( ) , It . IsAny < Visual ? > ( ) ,
It . IsAny < bool > ( ) , It . IsAny < CancellationToken > ( ) ) )
. Returns ( Task . CompletedTask ) ;
var target = new TabControl
{
Items =
{
new TabItem { Name = "first" , Content = firstPage } ,
new TabItem { Name = "second" , Content = secondPage } ,
} ,
} ;
var root = CreateRoot ( target ) ;
root . LayoutManager . ExecuteInitialLayoutPass ( ) ;
target . SelectedIndex = 1 ;
root . LayoutManager . ExecuteLayoutPass ( ) ;
var primary = target . GetVisualDescendants ( )
. OfType < ContentPresenter > ( )
. Single ( x = > x . Name = = "PART_SelectedContentHost" ) ;
var secondary = target . GetVisualDescendants ( )
. OfType < ContentPresenter > ( )
. Single ( x = > x . Name = = "PART_SelectedContentHost2" ) ;
// Simulate the stale presenter ownership that can happen when tab changes
// interrupt a transition: the page is still parented by the named content
// host, but the active field no longer points at that host.
primary . SetContentWithDataContext ( firstPage , null ) ;
secondary . IsVisible = false ;
SetPrivateField ( target , "_contentPart" , secondary ) ;
SetPrivateField ( target , "_contentPresenter2" , secondary ) ;
target . PageTransition = transition . Object ;
var exception = Record . Exception ( ( ) = > target . SelectedIndex = 0 ) ;
Assert . Null ( exception ) ;
Assert . Same ( firstPage , target . SelectedContent ) ;
Assert . Null ( primary . Content ) ;
Assert . Same ( firstPage , secondary . Content ) ;
}
private static IControlTemplate TabControlTemplate ( )
{
return new FuncControlTemplate < TabControl > ( ( parent , scope ) = >
@ -943,72 +1104,11 @@ namespace Avalonia.Controls.UnitTests
} ) ;
}
/// <summary>
/// This test ensures that the selected tab is the first visible and enabled tab.
/// </summary>
[Fact]
public void Only_First_Visible_And_Enabled_Tab_Should_Be_Selected_By_Default ( )
{
using ( UnitTestApplication . Start ( TestServices . StyledWindow ) )
{
TabItem expectedSelectionItem ;
var target = new TabControl
{
Template = TabControlTemplate ( ) ,
Items =
{
new TabItem { Name = "first" , Content = "foo" , IsVisible = false } ,
new TabItem { Name = "second" , Content = "bar" , IsEnabled = false } ,
( expectedSelectionItem = new TabItem { Name = "third" , Content = "baz" } ) ,
}
} ;
target . ApplyTemplate ( ) ;
var root = new TestRoot ( target ) ;
root . LayoutManager . ExecuteInitialLayoutPass ( ) ;
// the 3rd item should be selected
Assert . Equal ( 2 , target . SelectedIndex ) ;
Assert . Equal ( expectedSelectionItem , target . SelectedItem ) ;
}
}
/// <summary>
/// This test ensures that also an invisible TabControl can receive a selection
/// </summary>
[Fact]
public void SelectedIndex_Should_Restore_After_Control_Gets_Visible ( )
private static void SetPrivateField < T > ( TabControl target , string name , T value )
{
using ( UnitTestApplication . Start ( TestServices . StyledWindow ) )
{
TabItem expectedSelectionItem ;
var target = new TabControl
{
IsVisible = false ,
Template = TabControlTemplate ( ) ,
Items =
{
new TabItem { Name = "first" , Content = "foo" } ,
( expectedSelectionItem = new TabItem { Name = "second" , Content = "bar" } ) ,
new TabItem { Name = "third" , Content = "baz" } ,
} ,
SelectedIndex = 1
} ;
target . ApplyTemplate ( ) ;
var root = new TestRoot ( target ) ;
root . LayoutManager . ExecuteInitialLayoutPass ( ) ;
target . IsVisible = true ;
// the 2nd item should be selected
Assert . Equal ( 1 , target . SelectedIndex ) ;
Assert . Equal ( expectedSelectionItem , target . SelectedItem ) ;
}
var field = typeof ( TabControl ) . GetField ( name , BindingFlags . Instance | BindingFlags . NonPublic ) ;
Assert . NotNull ( field ) ;
field . SetValue ( target , value ) ;
}
private static IControlTemplate TabItemTemplate ( )
timunie
5 months ago