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/* =========================================================================================
* 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 org.scalatest.{Matchers, WordSpec}
class LongAdderCounterSpec extends WordSpec with Matchers {
"a LongAdderCounter" should {
"allow unit and bundled increments" in {
val counter = buildCounter("unit-increments")
counter.increment()
counter.increment()
counter.increment(40)
counter.snapshot().value shouldBe 42
}
"warn the user and ignore attempts to decrement the counter" in {
val counter = buildCounter("attempt-to-decrement")
counter.increment(100)
counter.increment(100)
counter.increment(100)
counter.snapshot().value shouldBe 300
}
"reset the internal state to zero after taking snapshots as a default behavior" in {
val counter = buildCounter("reset-after-snapshot")
counter.increment()
counter.increment(10)
counter.snapshot().value shouldBe 11
counter.snapshot().value shouldBe 0
}
"optionally leave the internal state unchanged" in {
val counter = buildCounter("reset-after-snapshot")
counter.increment()
counter.increment(10)
counter.snapshot(resetState = false).value shouldBe 11
counter.snapshot(resetState = false).value shouldBe 11
}
}
def buildCounter(name: String, tags: Map[String, String] = Map.empty, unit: MeasurementUnit = MeasurementUnit.none): LongAdderCounter =
new LongAdderCounter(name, tags, unit)
}
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