fix: create-config autofac registration

Can now use the create-config subcommand without autofac throwing an
exception

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Fix exception that occurred when running the create-config subcommand.
+
 ## [1.3.1] - 2021-05-05
 
 ### Changed

src/Trash.Tests/CompositionRootTest.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Collections;
+using System.Linq;
+using System.Reflection;
+using Autofac;
+using CliFx;
+using NUnit.Framework;
+
+namespace Trash.Tests
+{
+    [TestFixture]
+    [Parallelizable(ParallelScope.All)]
+    public class CompositionRootTest
+    {
+        private class ConcreteTypeEnumerator<T> : IEnumerable
+        {
+            private readonly Assembly _asm;
+
+            public ConcreteTypeEnumerator()
+            {
+                _asm = Assembly.GetAssembly(typeof(CompositionRoot)) ?? throw new NullReferenceException();
+            }
+
+            public IEnumerator GetEnumerator()
+            {
+                return _asm.DefinedTypes
+                    .Where(t => t.GetInterfaces().Contains(typeof(ICommand)) && !t.IsAbstract)
+                    .GetEnumerator();
+            }
+        }
+
+        [TestCaseSource(typeof(ConcreteTypeEnumerator<ICommand>))]
+        public void Resolve_ICommandConcreteClasses(Type concreteCmd)
+        {
+            var builder = new ContainerBuilder();
+            var container = CompositionRoot.Setup(builder);
+            container.Resolve(concreteCmd);
+        }
+    }
+}

src/Trash/CompositionRoot.cs

@@ -67,9 +67,7 @@ namespace Trash
         {
             // Register all types deriving from CliFx's ICommand. These are all of our supported subcommands.
             builder.RegisterAssemblyTypes(Assembly.GetExecutingAssembly())
-                .Where(t => t.IsAssignableTo(typeof(ICommand)))
-                .As<IServiceCommand>()
-                .AsSelf();
+                .Where(t => t.IsAssignableTo(typeof(ICommand)));
 
             // Used to access the chosen command class. This is assigned from CliTypeActivator
             builder.RegisterType<ActiveServiceCommandProvider>()