Avalonia/tests/Avalonia.Markup.Xaml.UnitTests/Data/BindingTests_Source.cs

// Copyright (c) The Avalonia Project. All rights reserved.
// Licensed under the MIT license. See licence.md file in the project root for full license information.

using Moq;
using Avalonia.Controls;
using Avalonia.Data;
using Avalonia.Markup.Data;
using Avalonia.Markup.Xaml.Data;
using Xunit;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace Avalonia.Markup.Xaml.UnitTests.Data
{
    public class BindingTests_Source
    {
        [Fact]
        public void Source_Should_Be_Used()
        {
            var source = new Source { Foo = "foo" };
            var binding = new Binding { Source = source, Path = "Foo" };
            var target = new TextBlock();

            target.Bind(TextBlock.TextProperty, binding);

            Assert.Equal(target.Text, "foo");
        }
        
        public class Source : INotifyPropertyChanged
        {
            private string _foo;

            public string Foo
            {
                get { return _foo; }
                set
                {
                    _foo = Foo;
                    RaisePropertyChanged();
                }
            }

            public event PropertyChangedEventHandler PropertyChanged;

            private void RaisePropertyChanged([CallerMemberName] string prop = "")
            {
                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(prop));
            }
        }
    }
}