Avalonia/tests/Perspex.Base.UnitTests/PerspexObjectTests_Metadata.cs

// -----------------------------------------------------------------------
// <copyright file="PerspexObjectTests_Metadata.cs" company="Steven Kirk">
// Copyright 2015 MIT Licence. See licence.md for more information.
// </copyright>
// -----------------------------------------------------------------------

namespace Perspex.Base.UnitTests
{
    using System;
    using System.Linq;
    using System.Reactive.Linq;
    using System.Reactive.Subjects;
    using Xunit;

    public class PerspexObjectTests_Metadata
    {
        public PerspexObjectTests_Metadata()
        {
            // Ensure properties are registered.
            PerspexProperty p;
            p = Class1.FooProperty;
            p = Class2.BarProperty;
        }

        [Fact]
        public void GetProperties_Returns_Registered_Properties()
        {
            string[] names = PerspexObject.GetProperties(typeof(Class1)).Select(x => x.Name).ToArray();

            Assert.Equal(new[] { "Foo", "Baz", "Qux" }, names);
        }

        [Fact]
        public void GetProperties_Returns_Registered_Properties_For_Base_Types()
        {
            string[] names = PerspexObject.GetProperties(typeof(Class2)).Select(x => x.Name).ToArray();

            Assert.Equal(new[] { "Bar", "Flob", "Fred", "Foo", "Baz", "Qux" }, names);
        }

        private class Class1 : PerspexObject
        {
            public static readonly PerspexProperty<string> FooProperty =
                PerspexProperty.Register<Class1, string>("Foo");

            public static readonly PerspexProperty<string> BazProperty =
                PerspexProperty.Register<Class1, string>("Baz");

            public static readonly PerspexProperty<int> QuxProperty =
                PerspexProperty.Register<Class1, int>("Qux");
        }

        private class Class2 : Class1
        {
            public static readonly PerspexProperty<string> BarProperty =
                PerspexProperty.Register<Class2, string>("Bar");

            public static readonly PerspexProperty<double> FlobProperty =
                PerspexProperty.Register<Class2, double>("Flob");

            public static readonly PerspexProperty<double?> FredProperty =
                PerspexProperty.Register<Class2, double?>("Fred");
        }
    }
}