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.streams.processor.internals;
  
  import org.apache.kafka.clients.consumer.Consumer;
  import org.apache.kafka.common.Metric;
  import org.apache.kafka.common.MetricName;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  import org.mockito.junit.jupiter.MockitoSettings;
  import org.mockito.quality.Strictness;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.function.Supplier;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  import static org.mockito.Mockito.when;
  
  @ExtendWith(MockitoExtension.class)
  @MockitoSettings(strictness = Strictness.STRICT_STUBS)
  public class StreamThreadTotalBlockedTimeTest {
      private static final int IO_TIME_TOTAL = 1;
      private static final int IO_WAIT_TIME_TOTAL = 2;
      private static final int COMMITTED_TIME_TOTAL = 3;
      private static final int COMMIT_SYNC_TIME_TOTAL = 4;
      private static final int RESTORE_IOTIME_TOTAL = 5;
      private static final int RESTORE_IO_WAITTIME_TOTAL = 6;
      private static final double PRODUCER_BLOCKED_TIME = 7.0;
  
      @Mock
      Consumer<?, ?> consumer;
      @Mock
      Consumer<?, ?> restoreConsumer;
      @Mock
      Supplier<Double> producerBlocked;
  
      private StreamThreadTotalBlockedTime blockedTime;
  
      @BeforeEach
      public void setup() {
          blockedTime = new StreamThreadTotalBlockedTime(consumer, restoreConsumer, producerBlocked);
          when(consumer.metrics()).thenAnswer(a -> new MetricsBuilder()
              .addMetric("io-time-ns-total", IO_TIME_TOTAL)
              .addMetric("io-wait-time-ns-total", IO_WAIT_TIME_TOTAL)
              .addMetric("committed-time-ns-total", COMMITTED_TIME_TOTAL)
              .addMetric("commit-sync-time-ns-total", COMMIT_SYNC_TIME_TOTAL)
              .build()
          );
          when(restoreConsumer.metrics()).thenAnswer(a -> new MetricsBuilder()
              .addMetric("io-time-ns-total", RESTORE_IOTIME_TOTAL)
              .addMetric("io-wait-time-ns-total", RESTORE_IO_WAITTIME_TOTAL)
              .build()
          );
          when(producerBlocked.get()).thenReturn(PRODUCER_BLOCKED_TIME);
      }
  
      @Test
      public void shouldComputeTotalBlockedTime() {
          assertThat(
              blockedTime.compute(),
              equalTo(IO_TIME_TOTAL + IO_WAIT_TIME_TOTAL + COMMITTED_TIME_TOTAL
                  + COMMIT_SYNC_TIME_TOTAL + RESTORE_IOTIME_TOTAL + RESTORE_IO_WAITTIME_TOTAL
                  + PRODUCER_BLOCKED_TIME)
          );
      }
  
      private static class MetricsBuilder {
          private final HashMap<MetricName, Metric> metrics = new HashMap<>();
  
          private MetricsBuilder addMetric(final String name, final double value) {
              final MetricName metricName = new MetricName(name, "", "", Collections.emptyMap());
              metrics.put(
                  metricName,
                  new Metric() {
                      @Override
                      public MetricName metricName() {
                          return metricName;
                      }
  
                      @Override
                      public Object metricValue() {
                          return value;
                      }
                  }
              );
              return this;
          }
  
          public Map<MetricName, ? extends Metric> build() {
              return Collections.unmodifiableMap(metrics);
          }
      }
  }