1 files changed, 127 insertions, 0 deletions
diff --git a/kamon-core/src/test/scala/kamon/metric/SimpleMetricsSpec.scala b/kamon-core/src/test/scala/kamon/metric/SimpleMetricsSpec.scala
new file mode 100644
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+++ b/kamon-core/src/test/scala/kamon/metric/SimpleMetricsSpec.scala
@@ -0,0 +1,127 @@
+/*
+ * =========================================================================================
+ * Copyright © 2013-2015 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.metric
+
+import com.typesafe.config.ConfigFactory
+import kamon.Kamon
+import kamon.metric.instrument.Histogram.DynamicRange
+import kamon.testkit.BaseKamonSpec
+import scala.concurrent.duration._
+
+class SimpleMetricsSpec extends BaseKamonSpec("simple-metrics-spec") {
+  override lazy val config =
+    ConfigFactory.parseString(
+      """
+        |kamon.metric {
+        |  tick-interval = 1 hour
+        |  default-collection-context-buffer-size = 10
+        |}
+      """.stripMargin)
+
+  "the SimpleMetrics extension" should {
+
+    "allow registering a fully configured Histogram and get the same Histogram if registering again" in {
+      val histogramA = Kamon.simpleMetrics.histogram("histogram-with-settings", DynamicRange(1, 10000, 2))
+      val histogramB = Kamon.simpleMetrics.histogram("histogram-with-settings", DynamicRange(1, 10000, 2))
+
+      histogramA shouldBe theSameInstanceAs(histogramB)
+    }
+
+    "return the original Histogram when registering a fully configured Histogram for second time but with different settings" in {
+      val histogramA = Kamon.simpleMetrics.histogram("histogram-with-settings", DynamicRange(1, 10000, 2))
+      val histogramB = Kamon.simpleMetrics.histogram("histogram-with-settings", DynamicRange(1, 50000, 2))
+
+      histogramA shouldBe theSameInstanceAs(histogramB)
+    }
+
+    "allow registering a Histogram that takes the default configuration from the kamon.metrics.precision settings" in {
+      Kamon.simpleMetrics.histogram("histogram-with-default-configuration")
+    }
+
+    "allow registering a Counter and get the same Counter if registering again" in {
+      val counterA = Kamon.simpleMetrics.counter("counter")
+      val counterB = Kamon.simpleMetrics.counter("counter")
+
+      counterA shouldBe theSameInstanceAs(counterB)
+    }
+
+    "allow registering a fully configured MinMaxCounter and get the same MinMaxCounter if registering again" in {
+      val minMaxCounterA = Kamon.simpleMetrics.minMaxCounter("min-max-counter-with-settings", DynamicRange(1, 10000, 2), 1 second)
+      val minMaxCounterB = Kamon.simpleMetrics.minMaxCounter("min-max-counter-with-settings", DynamicRange(1, 10000, 2), 1 second)
+
+      minMaxCounterA shouldBe theSameInstanceAs(minMaxCounterB)
+    }
+
+    "return the original MinMaxCounter when registering a fully configured MinMaxCounter for second time but with different settings" in {
+      val minMaxCounterA = Kamon.simpleMetrics.minMaxCounter("min-max-counter-with-settings", DynamicRange(1, 10000, 2), 1 second)
+      val minMaxCounterB = Kamon.simpleMetrics.minMaxCounter("min-max-counter-with-settings", DynamicRange(1, 50000, 2), 1 second)
+
+      minMaxCounterA shouldBe theSameInstanceAs(minMaxCounterB)
+    }
+
+    "allow registering a MinMaxCounter that takes the default configuration from the kamon.metrics.precision settings" in {
+      Kamon.simpleMetrics.minMaxCounter("min-max-counter-with-default-configuration")
+    }
+
+    "allow registering a fully configured Gauge and get the same Gauge if registering again" in {
+      val gaugeA = Kamon.simpleMetrics.gauge("gauge-with-settings", DynamicRange(1, 10000, 2), 1 second, {
+        () ⇒ 1L
+      })
+
+      val gaugeB = Kamon.simpleMetrics.gauge("gauge-with-settings", DynamicRange(1, 10000, 2), 1 second, {
+        () ⇒ 1L
+      })
+
+      gaugeA shouldBe theSameInstanceAs(gaugeB)
+    }
+
+    "return the original Gauge when registering a fully configured Gauge for second time but with different settings" in {
+      val gaugeA = Kamon.simpleMetrics.gauge("gauge-with-settings", DynamicRange(1, 10000, 2), 1 second, {
+        () ⇒ 1L
+      })
+
+      val gaugeB = Kamon.simpleMetrics.gauge("gauge-with-settings", DynamicRange(1, 10000, 2), 1 second, {
+        () ⇒ 1L
+      })
+
+      gaugeA shouldBe theSameInstanceAs(gaugeB)
+    }
+
+    "allow registering a Gauge that takes the default configuration from the kamon.metrics.precision settings" in {
+      Kamon.simpleMetrics.gauge("gauge-with-default-configuration", {
+        () ⇒ 2L
+      })
+    }
+
+    "allow un-registering user metrics" in {
+      val counter = Kamon.simpleMetrics.counter("counter-for-remove")
+      val histogram = Kamon.simpleMetrics.histogram("histogram-for-remove")
+      val minMaxCounter = Kamon.simpleMetrics.minMaxCounter("min-max-counter-for-remove")
+      val gauge = Kamon.simpleMetrics.gauge("gauge-for-remove", { () ⇒ 2L })
+
+      Kamon.simpleMetrics.removeCounter("counter-for-remove")
+      Kamon.simpleMetrics.removeHistogram("histogram-for-remove")
+      Kamon.simpleMetrics.removeMinMaxCounter("min-max-counter-for-remove")
+      Kamon.simpleMetrics.removeGauge("gauge-for-remove")
+
+      counter should not be (theSameInstanceAs(Kamon.simpleMetrics.counter("counter-for-remove")))
+      histogram should not be (theSameInstanceAs(Kamon.simpleMetrics.histogram("histogram-for-remove")))
+      minMaxCounter should not be (theSameInstanceAs(Kamon.simpleMetrics.minMaxCounter("min-max-counter-for-remove")))
+      gauge should not be (theSameInstanceAs(Kamon.simpleMetrics.gauge("gauge-for-remove", { () ⇒ 2L })))
+    }
+  }
+}