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.beam.runners.dataflow.worker.counters;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  import static org.hamcrest.Matchers.not;
  import static org.junit.Assert.assertSame;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.verifyNoMoreInteractions;
  
  import org.apache.beam.runners.dataflow.worker.counters.Counter.CounterUpdateExtractor;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  import org.mockito.Mockito;
  
  /** Unit tests for {@link CounterSet}. */
  @RunWith(JUnit4.class)
  public class CounterSetTest {
  
    private final CounterName name1 = CounterName.named("c1");
    private final CounterName name2 = CounterName.named("c2");
  
    private CounterSet counterSet = new CounterSet();
  
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    @Test
    public void testAddWithDifferentNamesAddsAll() {
      counterSet.longSum(name1);
      counterSet.intMax(name2);
  
      assertThat(counterSet.size(), equalTo(2L));
    }
  
    @Test
    public void testNonMatchingCounterName() {
      CounterName cn1 = CounterName.named("myCounter1, origin=");
      CounterName cn2 = CounterName.named("myCounter1").withOrigin(", origin=");
  
      assertThat(cn1.getFlatName(), equalTo(cn1.getFlatName()));
      Counter<?, ?> c1 = counterSet.longSum(cn1);
      assertThat(c1, not(equalTo(counterSet.getExistingCounter(cn2))));
    }
  
    @Test
    public void testMatchingByCounterName() {
      CounterName cn1 = CounterName.named("myCounter1");
      CounterName cn2 = CounterName.named("myCounter1");
  
      Counter<?, ?> c1 = counterSet.longSum(cn1);
      assertThat(c1, equalTo(counterSet.getExistingCounter(cn2)));
    }
  
    @Test
    public void testAddWithAlreadyPresentNameReturnsFalse() {
      Counter<?, ?> c1 = counterSet.longSum(name1);
      Counter<?, ?> c1Dup = counterSet.longSum(name1);
  
      assertSame(c1, c1Dup);
      assertThat(counterSet.size(), equalTo(1L));
    }
  
    @Test
    public void testAddOrReuseWithIncompatibleTypesThrowsException() {
      Counter<?, ?> c1 = counterSet.longSum(name1);
  
      thrown.expect(IllegalArgumentException.class);
      // Should print the existing counter
      thrown.expectMessage(c1.toString());
      // Should print the counter we're trying to create
      thrown.expectMessage(new CounterFactory().doubleSum(name1).toString());
      // Should print the contents of the counter set
      thrown.expectMessage(counterSet.toString());
      counterSet.doubleSum(name1);
    }
  
    @Test
    public void testExtractUpdates() {
      CounterSet deltaSet = new CounterSet();
      CounterSet cumulativeSet = new CounterSet();
  
      CounterUpdateExtractor<?> updateExtractor = Mockito.mock(CounterUpdateExtractor.class);
  
      Counter<Long, Long> delta1 = deltaSet.longSum(name1);
      Counter<Long, Long> cumulative1 = cumulativeSet.longSum(name1);
  
      // delta counters
  
      delta1.addValue(10L);
  
      deltaSet.extractUpdates(true, updateExtractor);
      verify(updateExtractor).longSum(name1, true, 10L);
  
      delta1.addValue(5L);
  
      deltaSet.extractUpdates(true, updateExtractor);
      verify(updateExtractor).longSum(name1, true, 5L);
  
      // no updates to delta counters
  
      deltaSet.extractUpdates(true, updateExtractor);
      verify(updateExtractor).longSum(name1, true, 0L);
  
      // cumulative counters
  
      cumulative1.addValue(10L);
  
      cumulativeSet.extractUpdates(false, updateExtractor);
      verify(updateExtractor).longSum(name1, false, 10L);
  
      cumulative1.addValue(5L);
  
      cumulativeSet.extractUpdates(false, updateExtractor);
      verify(updateExtractor).longSum(name1, false, 15L);
  
      // no updates to cumulative counters
  
      cumulativeSet.extractUpdates(false, updateExtractor);
      verify(updateExtractor, times(2)).longSum(name1, false, 15L);
  
      // test extracting only modified deltas
  
      Counter<Integer, Integer> delta2 = deltaSet.intSum(name2);
  
      delta1.addValue(100L);
      delta2.addValue(200);
  
      deltaSet.extractModifiedDeltaUpdates(updateExtractor);
      verify(updateExtractor).longSum(name1, true, 100L);
      verify(updateExtractor).intSum(name2, true, 200);
  
      delta1.addValue(1L);
      deltaSet.extractModifiedDeltaUpdates(updateExtractor);
      verify(updateExtractor).longSum(name1, true, 1L);
  
      delta2.addValue(5);
      deltaSet.extractModifiedDeltaUpdates(updateExtractor);
      verify(updateExtractor).intSum(name2, true, 5);
  
      verifyNoMoreInteractions(updateExtractor);
    }
  }
  