Support config of custom router. See #1623

akka-actor-tests/src/test/scala/akka/routing/RoutingSpec.scala

@@ -13,6 +13,7 @@ import akka.util.Duration
 import akka.config.ConfigurationException
 import com.typesafe.config.ConfigFactory
 import java.util.concurrent.ConcurrentHashMap
+import com.typesafe.config.Config
 
 object RoutingSpec {
 
@@ -22,6 +23,10 @@ object RoutingSpec {
         router = round-robin
         nr-of-instances = 3
       }
+      /myrouter {
+        router = "akka.routing.RoutingSpec$MyRouter"
+        foo = bar
+      }
     }
     """
 
@@ -38,6 +43,18 @@ object RoutingSpec {
     }
   }
 
+  class MyRouter(config: Config) extends RouterConfig {
+    val foo = config.getString("foo")
+    def createRoute(routeeProps: Props, actorContext: ActorContext): Route = {
+      val routees = IndexedSeq(actorContext.actorOf(Props[Echo]))
+      registerRoutees(actorContext, routees)
+
+      {
+        case (sender, message) ⇒ Nil
+      }
+    }
+  }
+
 }
 
 @org.junit.runner.RunWith(classOf[org.scalatest.junit.JUnitRunner])
@@ -465,6 +482,10 @@ class RoutingSpec extends AkkaSpec(RoutingSpec.config) with DefaultTimeout with
         sys.shutdown()
       }
     }
+    "support custom router" in {
+      val myrouter = system.actorOf(Props().withRouter(FromConfig), "myrouter")
+      myrouter.isTerminated must be(false)
+    }
   }
 
   "custom router" must {