Move content from akka-docs-new into akka-docs

Now the paradox documentation is no longer functional until we update akka-docs
to generate from paradox instead of sphinx

akka-docs/src/test/scala/tutorial_2/DeviceSpec.scala

@@ -0,0 +1,51 @@
+/**
+ * Copyright (C) 2009-2017 Lightbend Inc. <http://www.lightbend.com>
+ */
+package tutorial_2
+
+import akka.testkit.{ AkkaSpec, TestProbe }
+
+import scala.concurrent.duration._
+
+class DeviceSpec extends AkkaSpec {
+
+  "Device actor" must {
+
+    //#device-read-test
+    "reply with empty reading if no temperature is known" in {
+      val probe = TestProbe()
+      val deviceActor = system.actorOf(Device.props("group", "device"))
+
+      deviceActor.tell(Device.ReadTemperature(requestId = 42), probe.ref)
+      val response = probe.expectMsgType[Device.RespondTemperature]
+      response.requestId should ===(42)
+      response.value should ===(None)
+    }
+    //#device-read-test
+
+    //#device-write-read-test
+    "reply with latest temperature reading" in {
+      val probe = TestProbe()
+      val deviceActor = system.actorOf(Device.props("group", "device"))
+
+      deviceActor.tell(Device.RecordTemperature(requestId = 1, 24.0), probe.ref)
+      probe.expectMsg(Device.TemperatureRecorded(requestId = 1))
+
+      deviceActor.tell(Device.ReadTemperature(requestId = 2), probe.ref)
+      val response1 = probe.expectMsgType[Device.RespondTemperature]
+      response1.requestId should ===(2)
+      response1.value should ===(Some(24.0))
+
+      deviceActor.tell(Device.RecordTemperature(requestId = 3, 55.0), probe.ref)
+      probe.expectMsg(Device.TemperatureRecorded(requestId = 3))
+
+      deviceActor.tell(Device.ReadTemperature(requestId = 4), probe.ref)
+      val response2 = probe.expectMsgType[Device.RespondTemperature]
+      response2.requestId should ===(4)
+      response2.value should ===(Some(55.0))
+    }
+    //#device-write-read-test
+
+  }
+
+}