Avalonia/tests/Avalonia.UnitTests/MockWindowingPlatform.cs

using System;
using Moq;
using Avalonia.Platform;

namespace Avalonia.UnitTests
{
    public class MockWindowingPlatform : IWindowingPlatform
    {
        private readonly Func<IWindowImpl> _windowImpl;
        private readonly Func<IPopupImpl> _popupImpl;

        public MockWindowingPlatform(Func<IWindowImpl> windowImpl = null, Func<IPopupImpl> popupImpl = null )
        {
            _windowImpl = windowImpl;
            _popupImpl = popupImpl;
        }

        public IWindowImpl CreateWindow()
        {
            return _windowImpl?.Invoke() ?? Mock.Of<IWindowImpl>(x => x.Scaling == 1);
        }

        public IEmbeddableWindowImpl CreateEmbeddableWindow()
        {
            throw new NotImplementedException();
        }

        public IPopupImpl CreatePopup() => _popupImpl?.Invoke() ?? Mock.Of<IPopupImpl>(x => x.Scaling == 1);
    }
}