AtomUI/tests/AtomUI.Desktop.Controls.Tests/NavMenu/NavMenuSelectionTests.cs

using Avalonia.Threading;
using Shouldly;
using Xunit;

namespace AtomUI.Desktop.Controls.Tests.NavMenu;

public class NavMenuSelectionTests
{
    static NavMenuSelectionTests()
    {
        AvaloniaTestApp.EnsureInitialized();
    }

    [Fact]
    public void NavMenu_Ignores_Stale_Async_SelectedItem_Replay()
    {
        var menu = new AtomUI.Desktop.Controls.NavMenu
        {
            Mode            = NavMenuMode.Inline,
            IsMotionEnabled = false
        };
        var first = new NavMenuNode
        {
            Header  = "First",
            ItemKey = "first"
        };
        var second = new NavMenuNode
        {
            Header  = "Second",
            ItemKey = "second"
        };
        menu.Items.Add(first);
        menu.Items.Add(second);

        var selectedNodes = new List<INavMenuNode>();
        menu.NavMenuNodeSelected += (_, args) => selectedNodes.Add(args.NavMenuNode);

        var window = new Avalonia.Controls.Window
        {
            Width   = 320,
            Height  = 240,
            Content = menu
        };

        try
        {
            window.Show();
            Dispatcher.UIThread.RunJobs();

            menu.SelectedItem = first;
            menu.SelectedItem = second;
            Dispatcher.UIThread.RunJobs();

            selectedNodes.ShouldBe([second]);
            menu.SelectedItem.ShouldBeSameAs(second);
        }
        finally
        {
            window.Close();
        }
    }
}