Stitch EventAggregator into bootstrapper

Stylet/Bootstrapper.cs

@@ -25,7 +25,9 @@ namespace Stylet
         protected virtual void ConfigureIoC(IStyletIoCBuilder builder)
         {
             builder.Autobind(AssemblySource.Assemblies);
+
             builder.Bind<IWindowManager>().To<WindowManager>().InSingletonScope();
+            builder.Bind<IEventAggregator>().To<EventAggregator>().InSingletonScope();
             builder.Bind<IViewManager>().To<ViewManager>().InSingletonScope();
         }
 

StyletUnitTests/EventAggregatorTests.cs

@@ -28,6 +28,11 @@ namespace StyletUnitTests
             public void Handle(M1 message) { this.ReceivedM1 = message; }
         }
 
+        public class C3 : IHandle<M1>
+        {
+            public void Handle(M1 message) { throw new Exception("Should not be called. Ever"); }
+        }
+
         [Test]
         public void SubscribesAndDeliversExactMessage()
         {
@@ -54,5 +59,33 @@ namespace StyletUnitTests
             Assert.AreEqual(message, target.ReceivedM1);
             Assert.AreEqual(message, target.ReceivedM2);
         }
+
+        [Test]
+        public void UnsubscribeUnsubscribes()
+        {
+            var ea = new EventAggregator();
+            var target = new C1();
+            ea.Subscribe(target);
+            ea.Unsubscribe(target);
+
+            var message = new M1();
+            ea.Publish(message);
+
+            Assert.IsNull(target.ReceivedMessage);
+        }
+
+        [Test]
+        public void TargetReferenceIsWeak()
+        {
+            var ea = new EventAggregator();
+            var target = new C3();
+            ea.Subscribe(target);
+
+            // Ugly, but it's the only way to test a WeakReference...
+            target = null;
+            GC.Collect();
+
+            Assert.DoesNotThrow(() => ea.Publish(new M1()));
+        }
     }
 }