content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.kafka.common.telemetry.internals;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.time.Instant;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.function.Predicate;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class ClientTelemetryEmitterTest {
  
      private MetricKey metricKey;
      private Instant now;
  
      @BeforeEach
      public void setUp() {
          metricKey = new MetricKey("name", Collections.emptyMap());
          now = Instant.now();
      }
  
      @Test
      public void testShouldEmitMetric() {
          Predicate<? super MetricKeyable> selector = ClientTelemetryUtils.getSelectorFromRequestedMetrics(
              Collections.singletonList("io.test.metric"));
          ClientTelemetryEmitter emitter = new ClientTelemetryEmitter(selector, true);
  
          assertTrue(emitter.shouldEmitMetric(new MetricKey("io.test.metric")));
          assertTrue(emitter.shouldEmitMetric(new MetricKey("io.test.metric1")));
          assertTrue(emitter.shouldEmitMetric(new MetricKey("io.test.metric.producer.bytes")));
          assertFalse(emitter.shouldEmitMetric(new MetricKey("io.test")));
          assertFalse(emitter.shouldEmitMetric(new MetricKey("org.io.test.metric")));
          assertTrue(emitter.shouldEmitDeltaMetrics());
      }
  
      @Test
      public void testShouldEmitMetricSelectorAll() {
          ClientTelemetryEmitter emitter = new ClientTelemetryEmitter(ClientTelemetryUtils.SELECTOR_ALL_METRICS, true);
  
          assertTrue(emitter.shouldEmitMetric(new MetricKey("io.test.metric")));
          assertTrue(emitter.shouldEmitMetric(new MetricKey("io.test.metric1")));
          assertTrue(emitter.shouldEmitMetric(new MetricKey("io.test.metric.producer.bytes")));
          assertTrue(emitter.shouldEmitMetric(new MetricKey("io.test")));
          assertTrue(emitter.shouldEmitMetric(new MetricKey("org.io.test.metric")));
          assertTrue(emitter.shouldEmitDeltaMetrics());
      }
  
      @Test
      public void testShouldEmitMetricSelectorNone() {
          ClientTelemetryEmitter emitter = new ClientTelemetryEmitter(ClientTelemetryUtils.SELECTOR_NO_METRICS, true);
  
          assertFalse(emitter.shouldEmitMetric(new MetricKey("io.test.metric")));
          assertFalse(emitter.shouldEmitMetric(new MetricKey("io.test.metric1")));
          assertFalse(emitter.shouldEmitMetric(new MetricKey("io.test.metric.producer.bytes")));
          assertFalse(emitter.shouldEmitMetric(new MetricKey("io.test")));
          assertFalse(emitter.shouldEmitMetric(new MetricKey("org.io.test.metric")));
          assertTrue(emitter.shouldEmitDeltaMetrics());
      }
  
      @Test
      public void testShouldEmitDeltaMetricsFalse() {
          ClientTelemetryEmitter emitter = new ClientTelemetryEmitter(ClientTelemetryUtils.SELECTOR_ALL_METRICS, false);
          assertFalse(emitter.shouldEmitDeltaMetrics());
      }
  
      @Test
      public void testEmitMetric() {
          Predicate<? super MetricKeyable> selector = ClientTelemetryUtils.getSelectorFromRequestedMetrics(
              Collections.singletonList("name"));
          ClientTelemetryEmitter emitter = new ClientTelemetryEmitter(selector, true);
  
          SinglePointMetric gauge = SinglePointMetric.gauge(metricKey, Long.valueOf(1), now, Collections.emptySet());
          SinglePointMetric sum = SinglePointMetric.sum(metricKey, 1.0, true, now, Collections.emptySet());
          assertTrue(emitter.emitMetric(gauge));
          assertTrue(emitter.emitMetric(sum));
  
          MetricKey anotherKey = new MetricKey("io.name", Collections.emptyMap());
          assertFalse(emitter.emitMetric(SinglePointMetric.gauge(anotherKey, Long.valueOf(1), now, Collections.emptySet())));
  
          assertEquals(2, emitter.emittedMetrics().size());
          assertEquals(Arrays.asList(gauge, sum), emitter.emittedMetrics());
      }
  }
  