code: /*
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed 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 io.reactivex.rxjava3.parallel;
  
  import static org.junit.Assert.*;
  
  import java.io.IOException;
  import java.util.*;
  import java.util.concurrent.TimeUnit;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.internal.functions.Functions;
  import io.reactivex.rxjava3.internal.operators.parallel.ParallelSortedJoin;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import io.reactivex.rxjava3.processors.*;
  import io.reactivex.rxjava3.schedulers.Schedulers;
  import io.reactivex.rxjava3.subscribers.TestSubscriber;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class ParallelSortedJoinTest extends RxJavaTest {
  
      @Test
      public void cancel() {
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          TestSubscriber<Integer> ts = pp
          .parallel()
          .sorted(Functions.<Integer>naturalComparator())
          .test();
  
          assertTrue(pp.hasSubscribers());
  
          ts.cancel();
  
          assertFalse(pp.hasSubscribers());
      }
  
      @Test
      public void error() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
  
          try {
              Flowable.<Integer>error(new TestException())
              .parallel()
              .sorted(Functions.<Integer>naturalComparator())
              .test()
              .assertFailure(TestException.class);
  
              assertTrue(errors.isEmpty());
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void error3() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
  
          try {
              Flowable.<Integer>error(new TestException())
              .parallel()
              .sorted(Functions.<Integer>naturalComparator())
              .test(0)
              .assertFailure(TestException.class);
  
              assertTrue(errors.isEmpty());
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void error2() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
  
          try {
              ParallelFlowable.fromArray(Flowable.<Integer>error(new IOException()), Flowable.<Integer>error(new TestException()))
              .sorted(Functions.<Integer>naturalComparator())
              .test()
              .assertFailure(IOException.class);
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void comparerCrash() {
          Flowable.fromArray(4, 3, 2, 1)
          .parallel(2)
          .sorted(new Comparator<Integer>() {
              @Override
              public int compare(Integer o1, Integer o2) {
                  if (o1 == 4 && o2 == 3) {
                      throw new TestException();
                  }
                  return o1.compareTo(o2);
              }
          })
          .test()
          .assertFailure(TestException.class, 1, 2);
      }
  
      @Test
      public void empty() {
          Flowable.<Integer>empty()
          .parallel()
          .sorted(Functions.<Integer>naturalComparator())
          .test()
          .assertResult();
      }
  
      @Test
      public void asyncDrain() {
          Integer[] values = new Integer[100 * 1000];
          for (int i = 0; i < values.length; i++) {
              values[i] = values.length - i;
          }
  
          TestSubscriber<Integer> ts = Flowable.fromArray(values)
          .parallel(2)
          .runOn(Schedulers.computation())
          .sorted(Functions.naturalComparator())
          .observeOn(Schedulers.single())
          .test();
  
          ts
          .awaitDone(5, TimeUnit.SECONDS)
          .assertValueCount(values.length)
          .assertNoErrors()
          .assertComplete();
  
          List<Integer> list = ts.values();
          for (int i = 0; i < values.length; i++) {
              assertEquals(i + 1, list.get(i).intValue());
          }
      }
  
      @Test
      public void sortCancelRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final ReplayProcessor<Integer> pp = ReplayProcessor.create();
              pp.onNext(1);
              pp.onNext(2);
  
              final TestSubscriber<Integer> ts = pp.parallel(2)
              .sorted(Functions.naturalComparator())
              .test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      pp.onComplete();
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ts.cancel();
                  }
              };
  
              TestHelper.race(r1, r2);
          }
      }
  
      @Test
      public void sortCancelRace2() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final ReplayProcessor<Integer> pp = ReplayProcessor.create();
              pp.onNext(1);
              pp.onNext(2);
  
              final TestSubscriber<Integer> ts = pp.parallel(2)
              .sorted(Functions.naturalComparator())
              .test(0);
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      pp.onComplete();
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ts.cancel();
                  }
              };
  
              TestHelper.race(r1, r2);
          }
      }
  
      @Test
      public void badRequest() {
          TestHelper.assertBadRequestReported(PublishProcessor.<Integer>create().parallel().sorted(Functions.naturalComparator()));
      }
  
      @Test
      public void comparatorCrashWhileMainOnError() throws Throwable {
          TestHelper.withErrorTracking(errors -> {
              PublishProcessor<List<Integer>> pp1 = PublishProcessor.create();
              PublishProcessor<List<Integer>> pp2 = PublishProcessor.create();
  
              new ParallelSortedJoin<>(ParallelFlowable.fromArray(pp1, pp2)
              , (a, b) -> {
                  pp1.onError(new IOException());
                  throw new TestException();
              })
              .test();
  
              pp1.onNext(Arrays.asList(1));
              pp2.onNext(Arrays.asList(2));
  
              pp1.onComplete();
              pp2.onComplete();
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          });
      }
  }
  