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;
  
  import static org.apache.beam.runners.dataflow.worker.counters.CounterName.named;
  import static org.junit.Assert.assertNotNull;
  import static org.mockito.Mockito.verify;
  import static org.mockito.Mockito.verifyNoMoreInteractions;
  
  import org.apache.beam.runners.dataflow.worker.counters.Counter;
  import org.apache.beam.runners.dataflow.worker.counters.Counter.CounterUpdateExtractor;
  import org.apache.beam.runners.dataflow.worker.counters.CounterName;
  import org.apache.beam.runners.dataflow.worker.counters.CounterSet;
  import org.junit.Before;
  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;
  
  /** Tests for ApplianceShuffleCounters. */
  @RunWith(JUnit4.class)
  public class ApplianceShuffleCountersTest {
    private static final String DATASET_ID = "dataset";
    private CounterSet counterSet = new CounterSet();
  
    private ApplianceShuffleCounters counters;
  
    private CounterUpdateExtractor<?> mockUpdateExtractor =
        Mockito.mock(CounterUpdateExtractor.class);
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    @Before
    public void setUp() {
      resetCounters();
    }
  
    private void resetCounters() {
      this.counters =
          new ApplianceShuffleCounters(
              counterSet, NameContextsForTests.nameContextForTest(), DATASET_ID);
    }
  
    Counter<Long, Long> getCounter(String name) throws Exception {
      @SuppressWarnings("unchecked")
      Counter<Long, Long> counter =
          (Counter<Long, Long>) counterSet.getExistingCounter("stageName-systemName-dataset-" + name);
      return counter;
    }
  
    @Test
    public void testSingleCounter() throws Exception {
      String[] names = {"sum_counter"};
      String[] kinds = {"sum"};
      long[] deltas = {122};
      counters.importCounters(names, kinds, deltas);
  
      counterSet.extractUpdates(false, mockUpdateExtractor);
      verify(mockUpdateExtractor)
          .longSum(named("stageName-systemName-dataset-sum_counter"), false, 122L);
      verifyNoMoreInteractions(mockUpdateExtractor);
    }
  
    @Test
    public void testSingleCounterMultipleDeltas() throws Exception {
      String[] names = {"sum_counter", "sum_counter"};
      String[] kinds = {"sum", "sum"};
      long[] deltas = {122, 78};
      counters.importCounters(names, kinds, deltas);
  
      counterSet.extractUpdates(false, mockUpdateExtractor);
      verify(mockUpdateExtractor)
          .longSum(named("stageName-systemName-dataset-sum_counter"), false, 200L);
      verifyNoMoreInteractions(mockUpdateExtractor);
    }
  
    @Test
    public void testMultipleCounters() throws Exception {
      String[] names = {"sum_counter", "max_counter", "min_counter"};
      String[] kinds = {"sum", "max", "min"};
      long[] deltas = {100, 200, 300};
      counters.importCounters(names, kinds, deltas);
      Counter<Long, Long> sumCounter = getCounter("sum_counter");
      assertNotNull(sumCounter);
  
      counterSet.extractUpdates(false, mockUpdateExtractor);
      verify(mockUpdateExtractor)
          .longSum(named("stageName-systemName-dataset-sum_counter"), false, 100L);
      verify(mockUpdateExtractor)
          .longMax(named("stageName-systemName-dataset-max_counter"), false, 200L);
      verify(mockUpdateExtractor)
          .longMin(named("stageName-systemName-dataset-min_counter"), false, 300L);
      verifyNoMoreInteractions(mockUpdateExtractor);
    }
  
    @Test
    public void testSinglePreexistingCounter() throws Exception {
      Counter<Long, Long> sumCounter =
          counterSet.longSum(CounterName.named("stageName-systemName-dataset-sum_counter"));
      sumCounter.addValue(1000L);
      String[] names = {"sum_counter"};
      String[] kinds = {"sum"};
      long[] deltas = {122};
      counters.importCounters(names, kinds, deltas);
  
      counterSet.extractUpdates(false, mockUpdateExtractor);
      verify(mockUpdateExtractor)
          .longSum(named("stageName-systemName-dataset-sum_counter"), false, 1122L);
      verifyNoMoreInteractions(mockUpdateExtractor);
    }
  
    @Test
    public void testArrayLengthMismatch() throws Exception {
      String[] names = {"sum_counter"};
      String[] kinds = {"sum", "max"};
      long[] deltas = {122};
      try {
        counters.importCounters(names, kinds, deltas);
      } catch (AssertionError e) {
        // expected
      }
    }
  
    @Test
    public void testUnsupportedKind() throws Exception {
      String[] names = {"sum_counter"};
      String[] kinds = {"sum_int"};
      long[] deltas = {122};
      thrown.expect(IllegalArgumentException.class);
      thrown.expectMessage("sum_int");
      counters.importCounters(names, kinds, deltas);
    }
  }
  