diff options
Diffstat (limited to 'kamon-core/src/test/scala/kamon/metric/instrument/GaugeSpec.scala')
-rw-r--r-- | kamon-core/src/test/scala/kamon/metric/instrument/GaugeSpec.scala | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/kamon-core/src/test/scala/kamon/metric/instrument/GaugeSpec.scala b/kamon-core/src/test/scala/kamon/metric/instrument/GaugeSpec.scala new file mode 100644 index 00000000..b3ff3c9f --- /dev/null +++ b/kamon-core/src/test/scala/kamon/metric/instrument/GaugeSpec.scala @@ -0,0 +1,70 @@ +package kamon.metric.instrument + +import java.util.concurrent.atomic.AtomicLong + +import akka.actor.ActorSystem +import com.typesafe.config.ConfigFactory +import kamon.metric.{ Scale, CollectionContext } +import org.scalatest.{ Matchers, WordSpecLike } +import scala.concurrent.duration._ + +class GaugeSpec extends WordSpecLike with Matchers { + val system = ActorSystem("gauge-spec", ConfigFactory.parseString( + """ + |kamon.metrics { + | flush-interval = 1 hour + | precision { + | default-gauge-precision { + | refresh-interval = 100 milliseconds + | highest-trackable-value = 999999999 + | significant-value-digits = 2 + | } + | } + |} + """.stripMargin)) + + "a Gauge" should { + "automatically record the current value using the configured refresh-interval" in { + val numberOfValuesRecorded = new AtomicLong(0) + val gauge = Gauge.fromDefaultConfig(system) { () ⇒ numberOfValuesRecorded.addAndGet(1) } + + Thread.sleep(1.second.toMillis) + numberOfValuesRecorded.get() should be(10L +- 1L) + gauge.cleanup + } + + "stop automatically recording after a call to cleanup" in { + val numberOfValuesRecorded = new AtomicLong(0) + val gauge = Gauge.fromDefaultConfig(system) { () ⇒ numberOfValuesRecorded.addAndGet(1) } + + Thread.sleep(1.second.toMillis) + gauge.cleanup + numberOfValuesRecorded.get() should be(10L +- 1L) + Thread.sleep(1.second.toMillis) + numberOfValuesRecorded.get() should be(10L +- 1L) + } + + "produce a Histogram snapshot including all the recorded values" in { + val numberOfValuesRecorded = new AtomicLong(0) + val gauge = Gauge.fromDefaultConfig(system) { () ⇒ numberOfValuesRecorded.addAndGet(1) } + + Thread.sleep(1.second.toMillis) + gauge.cleanup + val snapshot = gauge.collect(CollectionContext.default) + + snapshot.numberOfMeasurements should be(10L +- 1L) + snapshot.min should be(1) + snapshot.max should be(10L +- 1L) + } + + "not record the current value when doing a collection" in { + val numberOfValuesRecorded = new AtomicLong(0) + val gauge = Gauge(Histogram.Precision.Normal, 10000L, Scale.Unit, 1 hour, system)(() ⇒ numberOfValuesRecorded.addAndGet(1)) + + val snapshot = gauge.collect(CollectionContext.default) + + snapshot.numberOfMeasurements should be(0) + numberOfValuesRecorded.get() should be(0) + } + } +} |