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.apiary;
  
  import static org.junit.Assert.assertEquals;
  
  import com.google.api.services.dataflow.model.MapTask;
  import com.google.api.services.dataflow.model.MultiOutputInfo;
  import com.google.api.services.dataflow.model.ParDoInstruction;
  import com.google.api.services.dataflow.model.ParallelInstruction;
  import java.util.ArrayList;
  import java.util.List;
  import org.apache.beam.sdk.fn.IdGenerators;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.ExpectedException;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link FixMultiOutputInfosOnParDoInstructions}. */
  @RunWith(JUnit4.class)
  public class FixMultiOutputInfosOnParDoInstructionsTest {
    @Rule public ExpectedException thrown = ExpectedException.none();
  
    @Test
    public void testExistingMultiOutputInfosAreUnmodified() {
      FixMultiOutputInfosOnParDoInstructions function =
          new FixMultiOutputInfosOnParDoInstructions(IdGenerators.decrementingLongs());
      MapTask output = function.apply(createMapTaskWithParDo(2, "5", "6"));
      assertEquals(createMapTaskWithParDo(2, "5", "6"), output);
    }
  
    @Test
    public void testDefaultOutputIsAddedIfOnlySingleOutput() {
      FixMultiOutputInfosOnParDoInstructions function =
          new FixMultiOutputInfosOnParDoInstructions(IdGenerators.decrementingLongs());
      MapTask output = function.apply(createMapTaskWithParDo(1));
      assertEquals(createMapTaskWithParDo(1, "-1"), output);
    }
  
    @Test
    public void testDefaultOutputHasDifferentIdsForEachMapTask() {
      FixMultiOutputInfosOnParDoInstructions function =
          new FixMultiOutputInfosOnParDoInstructions(IdGenerators.decrementingLongs());
      MapTask output = function.apply(createMapTaskWithParDo(1));
      assertEquals(createMapTaskWithParDo(1, "-1"), output);
  
      output = function.apply(createMapTaskWithParDo(1));
      assertEquals(createMapTaskWithParDo(1, "-2"), output);
    }
  
    @Test
    public void testMissingTagsForMultipleOutputsThrows() {
      FixMultiOutputInfosOnParDoInstructions function =
          new FixMultiOutputInfosOnParDoInstructions(IdGenerators.decrementingLongs());
      thrown.expect(IllegalArgumentException.class);
      thrown.expectMessage("Invalid ParDoInstruction");
      thrown.expectMessage("2 outputs specified");
      function.apply(createMapTaskWithParDo(2));
    }
  
    private static MapTask createMapTaskWithParDo(int numOutputs, String... tags) {
      ParDoInstruction parDoInstruction = new ParDoInstruction();
      parDoInstruction.setNumOutputs(numOutputs);
      List<MultiOutputInfo> multiOutputInfos = new ArrayList<>(tags.length);
      for (String tag : tags) {
        MultiOutputInfo multiOutputInfo = new MultiOutputInfo();
        multiOutputInfo.setTag(tag);
        multiOutputInfos.add(multiOutputInfo);
      }
      parDoInstruction.setMultiOutputInfos(multiOutputInfos);
      ParallelInstruction instruction = new ParallelInstruction();
      instruction.setParDo(parDoInstruction);
      MapTask mapTask = new MapTask();
      mapTask.setInstructions(ImmutableList.of(instruction));
      return mapTask;
    }
  }
  