1 files changed, 62 insertions, 0 deletions
diff --git a/kamon-core/src/test/scala/kamon/trace/instrumentation/FutureTracingSpec.scala b/kamon-core/src/test/scala/kamon/trace/instrumentation/FutureTracingSpec.scala
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+++ b/kamon-core/src/test/scala/kamon/trace/instrumentation/FutureTracingSpec.scala
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+/* ===================================================
+ * Copyright © 2013 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.trace.instrumentation
+
+import scala.concurrent.{ ExecutionContext, Await, Promise, Future }
+import org.scalatest.{ Matchers, OptionValues, WordSpec }
+import org.scalatest.concurrent.{ ScalaFutures, PatienceConfiguration }
+import java.util.UUID
+import scala.util.{ Random, Success }
+import scala.concurrent.duration._
+import java.util.concurrent.TimeUnit
+import akka.actor.{ Actor, ActorSystem }
+import kamon.trace.{ Trace, TraceContext }
+
+class FutureTracingSpec extends WordSpec with Matchers with ScalaFutures with PatienceConfiguration with OptionValues {
+
+  implicit val execContext = ExecutionContext.Implicits.global
+
+  "a Future created with FutureTracing" should {
+    "capture the TraceContext available when created" which {
+      "must be available when executing the future's body" in new TraceContextFixture {
+        var future: Future[Option[TraceContext]] = _
+
+        Trace.withContext(testTraceContext) {
+          future = Future(Trace.context)
+        }
+
+        whenReady(future)(ctxInFuture ⇒
+          ctxInFuture should equal(testTraceContext))
+      }
+
+      "must be available when executing callbacks on the future" in new TraceContextFixture {
+        var future: Future[Option[TraceContext]] = _
+
+        Trace.withContext(testTraceContext) {
+          future = Future("Hello Kamon!")
+            // The TraceContext is expected to be available during all intermediate processing.
+            .map(_.length)
+            .flatMap(len ⇒ Future(len.toString))
+            .map(s ⇒ Trace.context())
+        }
+
+        whenReady(future)(ctxInFuture ⇒
+          ctxInFuture should equal(testTraceContext))
+      }
+    }
+  }
+}
+