1 files changed, 98 insertions, 0 deletions
diff --git a/kamon-play-2.4.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala b/kamon-play-2.4.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala
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+++ b/kamon-play-2.4.x/src/test/scala/kamon/play/WSInstrumentationSpec.scala
@@ -0,0 +1,98 @@
+/* ===================================================
+ * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+package kamon.play
+
+import kamon.Kamon
+import kamon.metric.{ Entity, EntitySnapshot, TraceMetrics }
+import kamon.trace.{ Tracer, TraceContext, SegmentCategory }
+import org.scalatest.{ Matchers, WordSpecLike }
+import org.scalatestplus.play.OneServerPerSuite
+import play.api.libs.ws.WS
+import play.api.mvc.Action
+import play.api.mvc.Results.Ok
+import play.api.test.Helpers._
+import play.api.test._
+
+import scala.concurrent.Await
+import scala.concurrent.duration._
+
+class WSInstrumentationSpec extends WordSpecLike with Matchers with OneServerPerSuite {
+  Kamon.start()
+
+  System.setProperty("config.file", "./kamon-play/src/test/resources/conf/application.conf")
+
+  override lazy val port: Port = 19003
+  implicit override lazy val app = FakeApplication(withRoutes = {
+    case ("GET", "/async")   ⇒ Action { Ok("ok") }
+    case ("GET", "/outside") ⇒ Action { Ok("ok") }
+    case ("GET", "/inside")  ⇒ callWSinsideController(s"http://localhost:$port/async")
+  })
+
+  "the WS instrumentation" should {
+    "propagate the TraceContext inside an Action and complete the WS request" in {
+      Await.result(route(FakeRequest(GET, "/inside")).get, 10 seconds)
+
+      val snapshot = takeSnapshotOf("GET: /inside", "trace")
+      snapshot.histogram("elapsed-time").get.numberOfMeasurements should be(1)
+
+      val segmentMetricsSnapshot = takeSnapshotOf(s"http://localhost:$port/async", "trace-segment",
+        tags = Map(
+          "trace" -> "GET: /inside",
+          "category" -> SegmentCategory.HttpClient,
+          "library" -> Play.SegmentLibraryName))
+
+      segmentMetricsSnapshot.histogram("elapsed-time").get.numberOfMeasurements should be(1)
+    }
+
+    "propagate the TraceContext outside an Action and complete the WS request" in {
+      Tracer.withContext(newContext("trace-outside-action")) {
+        Await.result(WS.url(s"http://localhost:$port/outside").get(), 10 seconds)
+        Tracer.currentContext.finish()
+      }
+
+      val snapshot = takeSnapshotOf("trace-outside-action", "trace")
+      snapshot.histogram("elapsed-time").get.numberOfMeasurements should be(1)
+
+      val segmentMetricsSnapshot = takeSnapshotOf(s"http://localhost:$port/outside", "trace-segment",
+        tags = Map(
+          "trace" -> "trace-outside-action",
+          "category" -> SegmentCategory.HttpClient,
+          "library" -> Play.SegmentLibraryName))
+
+      segmentMetricsSnapshot.histogram("elapsed-time").get.numberOfMeasurements should be(1)
+    }
+  }
+
+  lazy val collectionContext = Kamon.metrics.buildDefaultCollectionContext
+
+  def newContext(name: String): TraceContext =
+    Kamon.tracer.newContext(name)
+
+  def takeSnapshotOf(name: String, category: String, tags: Map[String, String] = Map.empty): EntitySnapshot = {
+    val recorder = Kamon.metrics.find(Entity(name, category, tags)).get
+    recorder.collect(collectionContext)
+  }
+
+  def callWSinsideController(url: String) = Action.async {
+    import play.api.Play.current
+    import play.api.libs.concurrent.Execution.Implicits.defaultContext
+
+    WS.url(url).get().map { response ⇒
+      Ok("Ok")
+    }
+  }
+}
+\ No newline at end of file