BehaviorTestKit: get child inbox by anonymous ActorRef

akka-actor-testkit-typed/src/main/scala/akka/actor/testkit/typed/internal/BehaviorTestKitImpl.scala

@@ -50,6 +50,9 @@ private[akka] final class BehaviorTestKitImpl[T](_path: ActorPath, _initialBehav
     inbox.get
   }
 
+  override def childInbox[U](ref: ActorRef[U]): TestInboxImpl[U] =
+    childInbox(ref.path.name)
+
   override def childTestKit[U](child: ActorRef[U]): BehaviorTestKitImpl[U] = ctx.childTestKit(child)
 
   override def selfInbox(): TestInboxImpl[T] = ctx.selfInbox

akka-actor-testkit-typed/src/main/scala/akka/actor/testkit/typed/javadsl/BehaviorTestKit.scala

@@ -52,6 +52,12 @@ abstract class BehaviorTestKit[T] {
    */
   def childInbox[U](name: String): TestInbox[U]
 
+  /**
+   * Get the child inbox for the child with the given name, or fail if there is no child with the given name
+   * spawned
+   */
+  def childInbox[U](child: ActorRef[U]): TestInbox[U]
+
   /**
    * Get the [[akka.actor.typed.Behavior]] testkit for the given child [[akka.actor.typed.ActorRef]].
    */

akka-actor-testkit-typed/src/main/scala/akka/actor/testkit/typed/scaladsl/BehaviorTestKit.scala

@@ -53,6 +53,11 @@ trait BehaviorTestKit[T] {
    */
   def childInbox[U](name: String): TestInbox[U]
 
+  /**
+   * Get the child inbox for the child ActorRef, or fail if there is no such child.
+   */
+  def childInbox[U](child: ActorRef[U]): TestInbox[U]
+
   /**
    * Get the [[akka.actor.typed.Behavior]] testkit for the given child [[akka.actor.typed.ActorRef]].
    */

akka-actor-testkit-typed/src/test/scala/docs/akka/actor/testkit/typed/scaladsl/SyncTestingExampleSpec.scala

@@ -96,8 +96,9 @@ class SyncTestingExampleSpec extends WordSpec with Matchers {
       //#test-child-message-anonymous
       val testKit = BehaviorTestKit(myBehavior)
       testKit.run(SayHelloToAnonymousChild)
-      // Anonymous actors are created as: $a $b etc
-      val childInbox = testKit.childInbox[String](s"$$a")
+      val child = testKit.expectEffectType[SpawnedAnonymous[String]]
+
+      val childInbox = testKit.childInbox(child.ref)
       childInbox.expectMessage("hello stranger")
       //#test-child-message-anonymous
     }