move code to src/test

* so that it compiles and tests pass
* fix some additional snip references in getting started

akka-docs/src/test/scala/docs/actor/SchedulerDocSpec.scala

@@ -0,0 +1,68 @@
+/**
+ * Copyright (C) 2009-2017 Lightbend Inc. <http://www.lightbend.com>
+ */
+package docs.actor
+
+import language.postfixOps
+
+//#imports1
+import akka.actor.Actor
+import akka.actor.Props
+import scala.concurrent.duration._
+
+//#imports1
+
+import org.scalatest.{ BeforeAndAfterAll, WordSpec }
+import org.scalatest.Matchers
+import akka.testkit._
+
+class SchedulerDocSpec extends AkkaSpec(Map("akka.loglevel" -> "INFO")) {
+  "schedule a one-off task" in {
+    //#schedule-one-off-message
+    //Use the system's dispatcher as ExecutionContext
+    import system.dispatcher
+
+    //Schedules to send the "foo"-message to the testActor after 50ms
+    system.scheduler.scheduleOnce(50 milliseconds, testActor, "foo")
+    //#schedule-one-off-message
+
+    expectMsg(1 second, "foo")
+
+    //#schedule-one-off-thunk
+    //Schedules a function to be executed (send a message to the testActor) after 50ms
+    system.scheduler.scheduleOnce(50 milliseconds) {
+      testActor ! System.currentTimeMillis
+    }
+    //#schedule-one-off-thunk
+
+  }
+
+  "schedule a recurring task" in {
+    new AnyRef {
+      //#schedule-recurring
+      val Tick = "tick"
+      class TickActor extends Actor {
+        def receive = {
+          case Tick => //Do something
+        }
+      }
+      val tickActor = system.actorOf(Props(classOf[TickActor], this))
+      //Use system's dispatcher as ExecutionContext
+      import system.dispatcher
+
+      //This will schedule to send the Tick-message
+      //to the tickActor after 0ms repeating every 50ms
+      val cancellable =
+        system.scheduler.schedule(
+          0 milliseconds,
+          50 milliseconds,
+          tickActor,
+          Tick)
+
+      //This cancels further Ticks to be sent
+      cancellable.cancel()
+      //#schedule-recurring
+      system.stop(tickActor)
+    }
+  }
+}