separate the build into core, testkit and core-tests projects

1 files changed, 90 insertions, 0 deletions

diff --git a/kamon-core-tests/src/test/scala/kamon/metric/MinMaxCounterSpec.scala b/kamon-core-tests/src/test/scala/kamon/metric/MinMaxCounterSpec.scala
new file mode 100644
index 00000000..0ad3c45c
--- /dev/null
+++ b/kamon-core-tests/src/test/scala/kamon/metric/MinMaxCounterSpec.scala
@@ -0,0 +1,90 @@
+/* =========================================================================================
+ * Copyright © 2013-2017 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 java.time.Duration
+
+import org.scalatest.{Matchers, WordSpec}
+
+case class TemporalBucket(value: Long, frequency: Long) extends Bucket
+
+class MinMaxCounterSpec extends WordSpec with Matchers {
+
+  "a MinMaxCounter" should {
+    "track ascending tendencies" in {
+      val mmCounter = buildMinMaxCounter("track-ascending")
+      mmCounter.increment()
+      mmCounter.increment(3)
+      mmCounter.increment()
+
+      mmCounter.sample()
+
+      val snapshot = mmCounter.snapshot()
+
+      snapshot.distribution.min should be(0)
+      snapshot.distribution.max should be(5)
+    }
+
+    "track descending tendencies" in {
+      val mmCounter = buildMinMaxCounter("track-descending")
+      mmCounter.increment(5)
+      mmCounter.decrement()
+      mmCounter.decrement(3)
+      mmCounter.decrement()
+
+      mmCounter.sample()
+
+      val snapshot = mmCounter.snapshot()
+      snapshot.distribution.min should be(0)
+      snapshot.distribution.max should be(5)
+    }
+
+    "reset the min and max to the current value after taking a snapshot" in {
+      val mmCounter = buildMinMaxCounter("reset-min-max-to-current")
+
+      mmCounter.increment(5)
+      mmCounter.decrement(3)
+      mmCounter.sample()
+
+      val firstSnapshot = mmCounter.snapshot()
+      firstSnapshot.distribution.min should be(0)
+      firstSnapshot.distribution.max should be(5)
+
+      mmCounter.sample()
+
+      val secondSnapshot = mmCounter.snapshot()
+      secondSnapshot.distribution.min should be(2)
+      secondSnapshot.distribution.max should be(2)
+    }
+
+    "report zero as the min and current values if the current value fell bellow zero" in {
+      val mmCounter = buildMinMaxCounter("report-zero")
+
+      mmCounter.decrement(3)
+
+      mmCounter.sample()
+
+      val snapshot = mmCounter.snapshot()
+
+      snapshot.distribution.min should be(0)
+      snapshot.distribution.max should be(0)
+    }
+  }
+
+  def buildMinMaxCounter(name: String, tags: Map[String, String] = Map.empty, unit: MeasurementUnit = MeasurementUnit.none): SimpleMinMaxCounter =
+    new SimpleMinMaxCounter(name, tags, new AtomicHdrHistogram(name, tags, unit, dynamicRange = DynamicRange.Default), Duration.ofMillis(100))
+}
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