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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.instrumentation.scala
import akka.actor.ActorSystem
import akka.testkit.TestKit
import kamon.trace.TraceRecorder
import org.scalatest.concurrent.{ PatienceConfiguration, ScalaFutures }
import org.scalatest.{ Matchers, OptionValues, WordSpecLike }
import scala.concurrent.Future
class FutureInstrumentationSpec extends TestKit(ActorSystem("future-instrumentation-spec")) with WordSpecLike with Matchers
with ScalaFutures with PatienceConfiguration with OptionValues {
implicit val execContext = system.dispatcher
"a Future created with FutureTracing" should {
"capture the TraceContext available when created" which {
"must be available when executing the future's body" in {
val (future, testTraceContext) = TraceRecorder.withNewTraceContext("future-body") {
val future = Future(TraceRecorder.currentContext)
(future, TraceRecorder.currentContext)
}
whenReady(future)(ctxInFuture ⇒
ctxInFuture should equal(testTraceContext))
}
"must be available when executing callbacks on the future" in {
val (future, testTraceContext) = TraceRecorder.withNewTraceContext("future-body") {
val future = Future("Hello Kamon!")
// The TraceContext is expected to be available during all intermediate processing.
.map(_.length)
.flatMap(len ⇒ Future(len.toString))
.map(s ⇒ TraceRecorder.currentContext)
(future, TraceRecorder.currentContext)
}
whenReady(future)(ctxInFuture ⇒
ctxInFuture should equal(testTraceContext))
}
}
}
}
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