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.List;
  
  import org.junit.Test;
  import org.reactivestreams.Subscription;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.internal.functions.Functions;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import io.reactivex.rxjava3.testsupport.*;
  
  public class ParallelPeekTest extends RxJavaTest {
  
      @Test
      public void subscriberCount() {
          ParallelFlowableTest.checkSubscriberCount(Flowable.range(1, 5).parallel()
          .doOnNext(Functions.emptyConsumer()));
      }
  
      @Test
      @SuppressUndeliverable
      public void onSubscribeCrash() {
          Flowable.range(1, 5)
          .parallel()
          .doOnSubscribe(new Consumer<Subscription>() {
              @Override
              public void accept(Subscription s) throws Exception {
                  throw new TestException();
              }
          })
          .sequential()
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void doubleError() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              new ParallelInvalid()
              .doOnNext(Functions.emptyConsumer())
              .sequential()
              .test()
              .assertFailure(TestException.class);
  
              assertFalse(errors.isEmpty());
              for (Throwable ex : errors) {
                  assertTrue(ex.toString(), ex.getCause() instanceof TestException);
              }
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void requestCrash() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
  
          try {
              Flowable.range(1, 5)
              .parallel()
              .doOnRequest(new LongConsumer() {
                  @Override
                  public void accept(long n) throws Exception {
                      throw new TestException();
                  }
              })
              .sequential()
              .test()
              .assertResult(1, 2, 3, 4, 5);
  
              assertFalse(errors.isEmpty());
  
              for (Throwable ex : errors) {
                  assertTrue(ex.toString(), ex.getCause() instanceof TestException);
              }
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void cancelCrash() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
  
          try {
              Flowable.<Integer>never()
              .parallel()
              .doOnCancel(new Action() {
                  @Override
                  public void run() throws Exception {
                      throw new TestException();
                  }
              })
              .sequential()
              .test()
              .cancel();
  
              assertFalse(errors.isEmpty());
  
              for (Throwable ex : errors) {
                  assertTrue(ex.toString(), ex.getCause() instanceof TestException);
              }
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      @SuppressUndeliverable
      public void onCompleteCrash() {
          Flowable.just(1)
          .parallel()
          .doOnComplete(new Action() {
              @Override
              public void run() throws Exception {
                  throw new TestException();
              }
          })
          .sequential()
          .test()
          .assertFailure(TestException.class, 1);
      }
  
      @Test
      public void onAfterTerminatedCrash() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
  
          try {
              Flowable.just(1)
              .parallel()
              .doAfterTerminated(new Action() {
                  @Override
                  public void run() throws Exception {
                      throw new TestException();
                  }
              })
              .sequential()
              .test()
              .assertResult(1);
  
              assertFalse(errors.isEmpty());
  
              for (Throwable ex : errors) {
                  assertTrue(ex.toString(), ex.getCause() instanceof TestException);
              }
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void onAfterTerminatedCrash2() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
  
          try {
              Flowable.<Integer>error(new IOException())
              .parallel()
              .doAfterTerminated(new Action() {
                  @Override
                  public void run() throws Exception {
                      throw new TestException();
                  }
              })
              .sequential()
              .test()
              .assertFailure(IOException.class);
  
              assertFalse(errors.isEmpty());
  
              for (Throwable ex : errors) {
                  Throwable exc = ex.getCause();
                  assertTrue(ex.toString(), exc instanceof TestException
                          || exc instanceof IOException);
              }
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void doubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeFlowable(f ->
              ParallelFlowable.fromArray(f)
              .doOnComplete(() -> { })
              .sequential()
          );
      }
  }
  