unity.cs

using Shouldly;
using Unity;
using Unity.Injection;
using Xunit;

namespace Tests
{
    public interface IFoo { }
    public class Foo : IFoo { }

    public class UnityTests
    {
        [Fact]
        public void Should_overwrite_concrete_with_injection()
        {
            var container = new UnityContainer();

            var foo1 = new Foo();
            container.RegisterType<Foo>(new InjectionFactory(x => foo1));

            var foo2 = new Foo();
            container.RegisterType<Foo>(new InjectionFactory(x => foo2));

            var result = container.Resolve<Foo>();
            result.GetHashCode().ShouldBe(foo2.GetHashCode());
        }

        [Fact]
        public void Should_overwrite_interface_with_injection()
        {
            var container = new UnityContainer();

            var foo1 = new Foo();
            container.RegisterType<IFoo>(new InjectionFactory(x => foo1));

            var foo2 = new Foo();
            container.RegisterType<IFoo>(new InjectionFactory(x => foo2));

            var result = container.Resolve<IFoo>();
            result.GetHashCode().ShouldBe(foo2.GetHashCode());
        }

        [Fact]
        public void Should_overwrite_interface()
        {
            var container = new UnityContainer();

            var foo1 = new Foo();
            container.RegisterType<IFoo, Foo>(new InjectionFactory(x => foo1));

            var foo2 = new Foo();
            container.RegisterType<IFoo>(new InjectionFactory(x => foo2));

            var result = container.Resolve<IFoo>();
            result.GetHashCode().ShouldBe(foo2.GetHashCode());
        }

        [Fact]
        public void Should_resolve_injection()
        {
            var container = new UnityContainer();

            var foo1 = new Foo();
            container.RegisterType<IFoo, Foo>(new InjectionFactory(x => foo1));

            var result1 = container.Resolve<IFoo>();
            result1.GetHashCode().ShouldBe(foo1.GetHashCode()); // FAILS
        }

        [Fact]
        public void Should_overwrite_interface3()
        {
            var container = new UnityContainer();

            container.RegisterType<IFoo, Foo>();

            var foo2 = new Foo();
            container.RegisterType<IFoo>(new InjectionFactory(x => foo2));

            var result = container.Resolve<IFoo>();
            result.GetHashCode().ShouldBe(foo2.GetHashCode()); // FAILS
        }
    }
}