Test for Activating ReplaceInstance()

autofac · Apr 28, 2020 · 1bb9bde · 1bb9bde
1 parent 70df799
commit 1bb9bde
Showing 1 changed file with 28 additions and 0 deletions.
diff --git a/test/Autofac.Specification.Test/Lifetime/LifetimeEventTests.cs b/test/Autofac.Specification.Test/Lifetime/LifetimeEventTests.cs
@@ -73,6 +73,30 @@ public void ChainedOnActivatingEventsAreInvokedWithinASingleResolveOperation()
             Assert.True(secondEventRaised);
         }
 
+        [Fact]
+        public void MultilpeOnActivatingEventsCanPassReplacementOnward()
+        {
+            var builder = new ContainerBuilder();
+
+            var activatingInstances = new List<object>();
+
+            builder.RegisterType<AService>()
+                .OnActivating(e =>
+                {
+                    activatingInstances.Add(e.Instance);
+                    e.ReplaceInstance(new AServiceChild());
+                })
+                .OnActivating(e => activatingInstances.Add(e.Instance));
+
+            var container = builder.Build();
+            var result = container.Resolve<AService>();
+
+            Assert.IsType<AServiceChild>(result);
+            Assert.Equal(2, activatingInstances.Count);
+            Assert.IsType<AService>(activatingInstances[0]);
+            Assert.IsType<AServiceChild>(activatingInstances[1]);
+        }
+
         [Fact]
         public void ChainedOnActivatedEventsAreInvokedWithinASingleResolveOperation()
         {
@@ -438,6 +462,10 @@ private class AService : IService
         {
         }
 
+        private class AServiceChild : AService
+        {
+        }
+
         private class BService : IService
         {
         }