StabilityMatrix/StabilityMatrix.UITests/MainWindowTests.cs

using Avalonia.Controls;
using Avalonia.VisualTree;
using FluentAvalonia.UI.Controls;
using Microsoft.Extensions.DependencyInjection;
using StabilityMatrix.Avalonia.ViewModels;
using StabilityMatrix.Avalonia.Views;
using StabilityMatrix.UITests.Extensions;

namespace StabilityMatrix.UITests;

[UsesVerify]
[Collection("TempDir")]
[TestCaseOrderer("StabilityMatrix.UITests.PriorityOrderer", "StabilityMatrix.UITests")]
public class MainWindowTests : TestBase
{
    [AvaloniaFact, TestPriority(1)]
    public async Task MainWindow_ShouldOpen()
    {
        var (window, _) = GetMainWindow();

        window.Show();
        await Task.Delay(300);

        await DoInitialSetup();

        await Task.Delay(1000);
        await Verify(window, Settings);
    }

    [AvaloniaFact, TestPriority(2)]
    public async Task MainWindowViewModel_ShouldOk()
    {
        var viewModel = Services.GetRequiredService<MainWindowViewModel>();
        await Verify(viewModel, Settings);
    }

    [AvaloniaFact, TestPriority(3)]
    public async Task NavigateToModelBrowser_ShouldWork()
    {
        var (window, viewModel) = GetMainWindow();
        await DoInitialSetup();

        var y = window
            .FindDescendantOfType<NavigationView>()
            .GetVisualDescendants()
            .OfType<NavigationViewItem>()
            .FirstOrDefault(i => i.Content.ToString() == "Model Browser");

        await window.ClickTargetAsync(y);

        var frame = window.FindControl<Frame>("FrameView");
        Assert.IsType<CheckpointBrowserPage>(frame.Content);

        await Task.Delay(1000);
        SaveScreenshot(window);
        await Verify(window, Settings);
    }
}