LightInject GetAll Sequence Order Test

UnitTest1.cs

using LightInject;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Linq;

namespace _LightInjectTests
{
    public interface IFoo { }

    public class FooOne : IFoo { }

    public class FooTwo : IFoo { }

    public class FooThree : IFoo { }

    public class FooFour : IFoo { }

    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void ShouldGetOrderedFoo()
        {

            var container = new ServiceContainer();

            // mock dependency sort
            container.Register<IFoo, FooThree>("A");
            container.Register<IFoo, FooOne>("B");
            container.Register<IFoo, FooFour>("C");
            container.Register<IFoo, FooTwo>();

            var allFoo = container.GetAllInstances<IFoo>().ToList();

            Assert.IsTrue(allFoo.Count == 4);

            // expected order
            //Assert.IsTrue(allFoo[0] is FooThree, "First item");
            //Assert.IsTrue(allFoo[1] is FooOne, "Second item");
            //Assert.IsTrue(allFoo[2] is FooFour, "Third item");
            //Assert.IsTrue(allFoo[3] is FooTwo, "Fourth item");

            // actual order seems random
            Assert.IsTrue(allFoo[0] is FooTwo, "First item");
            Assert.IsTrue(allFoo[1] is FooThree, "Second item");
            Assert.IsTrue(allFoo[2] is FooFour, "Third item");
            Assert.IsTrue(allFoo[3] is FooOne, "Fourth item");
        }
    }
}