Avalonia Testing

Overview

Two testing approaches: ViewModel unit tests (no Avalonia needed, plain xUnit/NUnit), and headless UI tests using Avalonia.Headless (renders without a display).

ViewModel Unit Tests (No UI)

No special setup needed — ViewModels are plain C# classes:

[Fact]
public void Name_Change_RaisesPropertyChanged()
{
    var vm = new MainViewModel();
    var raised = new List<string?>();
    vm.PropertyChanged += (_, e) => raised.Add(e.PropertyName);

    vm.Name = "Alice";

    Assert.Contains(nameof(vm.Name), raised);
    Assert.Equal("Alice", vm.Name);
}