content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.instrumentation.micrometer.v1_5;
  
  import static io.opentelemetry.instrumentation.micrometer.v1_5.AbstractCounterTest.INSTRUMENTATION_NAME;
  import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.assertThat;
  import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.attributeEntry;
  
  import io.micrometer.core.instrument.LongTaskTimer;
  import io.micrometer.core.instrument.Metrics;
  import io.micrometer.core.instrument.MockClock;
  import io.opentelemetry.api.common.Attributes;
  import io.opentelemetry.instrumentation.testing.junit.InstrumentationExtension;
  import java.time.Duration;
  import org.junit.jupiter.api.Test;
  
  public abstract class AbstractLongTaskTimerHistogramTest {
  
    protected abstract InstrumentationExtension testing();
  
    protected abstract MockClock clock();
  
    @Test
    void testMicrometerHistogram() {
      // given
      LongTaskTimer timer =
          LongTaskTimer.builder("testLongTaskTimerHistogram")
              .description("This is a test timer")
              .serviceLevelObjectives(Duration.ofMillis(100), Duration.ofMillis(1000))
              .distributionStatisticBufferLength(10)
              .register(Metrics.globalRegistry);
  
      // when
      LongTaskTimer.Sample sample1 = timer.start();
      // only active tasks count
      timer.start().stop();
      clock().add(Duration.ofMillis(100));
      LongTaskTimer.Sample sample2 = timer.start();
      LongTaskTimer.Sample sample3 = timer.start();
      clock().add(Duration.ofMillis(10));
  
      // then
      testing()
          .waitAndAssertMetrics(
              INSTRUMENTATION_NAME,
              "testLongTaskTimerHistogram.active",
              metrics ->
                  metrics.anySatisfy(
                      metric ->
                          assertThat(metric)
                              .hasDescription("This is a test timer")
                              .hasUnit("{tasks}")
                              .hasLongSumSatisfying(
                                  sum ->
                                      sum.isNotMonotonic()
                                          .hasPointsSatisfying(
                                              point ->
                                                  point
                                                      .hasValue(3)
                                                      .hasAttributes(Attributes.empty())))));
      testing()
          .waitAndAssertMetrics(
              INSTRUMENTATION_NAME,
              "testLongTaskTimerHistogram.duration",
              metrics ->
                  metrics.anySatisfy(
                      metric ->
                          assertThat(metric)
                              .hasDescription("This is a test timer")
                              .hasUnit("s")
                              .hasDoubleSumSatisfying(
                                  sum ->
                                      sum.isNotMonotonic()
                                          .hasPointsSatisfying(
                                              point ->
                                                  point
                                                      .hasAttributes(Attributes.empty())
                                                      .satisfies(
                                                          pointData ->
                                                              assertThat(pointData.getValue())
                                                                  .isPositive())))));
      testing()
          .waitAndAssertMetrics(
              INSTRUMENTATION_NAME,
              "testLongTaskTimerHistogram.histogram",
              metrics ->
                  metrics.anySatisfy(
                      metric ->
                          assertThat(metric)
                              .hasDoubleGaugeSatisfying(
                                  gauge ->
                                      gauge.hasPointsSatisfying(
                                          point ->
                                              point
                                                  .hasAttributes(attributeEntry("le", "0.1"))
                                                  .hasValue(2),
                                          point ->
                                              point
                                                  .hasAttributes(attributeEntry("le", "1"))
                                                  .hasValue(3)))));
  
      // when
      sample1.stop();
      sample2.stop();
      sample3.stop();
  
      // then
      // Continues to report 0 after stopped.
      testing()
          .waitAndAssertMetrics(
              INSTRUMENTATION_NAME,
              "testLongTaskTimerHistogram.active",
              metrics ->
                  metrics.anySatisfy(
                      metric ->
                          assertThat(metric)
                              .hasDescription("This is a test timer")
                              .hasUnit("{tasks}")
                              .hasLongSumSatisfying(
                                  sum ->
                                      sum.isNotMonotonic()
                                          .hasPointsSatisfying(
                                              point ->
                                                  point
                                                      .hasValue(0)
                                                      .hasAttributes(Attributes.empty())))));
      testing()
          .waitAndAssertMetrics(
              INSTRUMENTATION_NAME,
              "testLongTaskTimerHistogram.duration",
              metrics ->
                  metrics.anySatisfy(
                      metric ->
                          assertThat(metric)
                              .hasDescription("This is a test timer")
                              .hasUnit("s")
                              .hasDoubleSumSatisfying(
                                  sum ->
                                      sum.isNotMonotonic()
                                          .hasPointsSatisfying(
                                              point ->
                                                  point
                                                      .hasValue(0)
                                                      .hasAttributes(Attributes.empty())))));
      testing()
          .waitAndAssertMetrics(
              INSTRUMENTATION_NAME,
              "testLongTaskTimerHistogram.histogram",
              metrics ->
                  metrics.anySatisfy(
                      metric ->
                          assertThat(metric)
                              .hasDoubleGaugeSatisfying(
                                  gauge ->
                                      gauge.hasPointsSatisfying(
                                          point ->
                                              point
                                                  .hasValue(0)
                                                  .hasAttributes(attributeEntry("le", "0.1")),
                                          point ->
                                              point
                                                  .hasValue(0)
                                                  .hasAttributes(attributeEntry("le", "1"))))));
    }
  }
  