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.internal.operators.maybe;
  
  import static org.junit.Assert.*;
  
  import java.util.List;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.Function;
  import io.reactivex.rxjava3.observers.TestObserver;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import io.reactivex.rxjava3.processors.PublishProcessor;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class MaybeTakeUntilPublisherTest extends RxJavaTest {
  
      @Test
      public void disposed() {
          TestHelper.checkDisposed(PublishProcessor.create().singleElement().takeUntil(Flowable.never()));
      }
  
      @Test
      public void doubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeMaybe(new Function<Maybe<Object>, MaybeSource<Object>>() {
              @Override
              public MaybeSource<Object> apply(Maybe<Object> m) throws Exception {
                  return m.takeUntil(Flowable.never());
              }
          });
      }
  
      @Test
      public void mainErrors() {
          PublishProcessor<Integer> pp1 = PublishProcessor.create();
          PublishProcessor<Integer> pp2 = PublishProcessor.create();
  
          TestObserver<Integer> to = pp1.singleElement().takeUntil(pp2).test();
  
          assertTrue(pp1.hasSubscribers());
          assertTrue(pp2.hasSubscribers());
  
          pp1.onError(new TestException());
  
          assertFalse(pp1.hasSubscribers());
          assertFalse(pp2.hasSubscribers());
  
          to.assertFailure(TestException.class);
      }
  
      @Test
      public void otherErrors() {
          PublishProcessor<Integer> pp1 = PublishProcessor.create();
          PublishProcessor<Integer> pp2 = PublishProcessor.create();
  
          TestObserver<Integer> to = pp1.singleElement().takeUntil(pp2).test();
  
          assertTrue(pp1.hasSubscribers());
          assertTrue(pp2.hasSubscribers());
  
          pp2.onError(new TestException());
  
          assertFalse(pp1.hasSubscribers());
          assertFalse(pp2.hasSubscribers());
  
          to.assertFailure(TestException.class);
      }
  
      @Test
      public void mainCompletes() {
          PublishProcessor<Integer> pp1 = PublishProcessor.create();
          PublishProcessor<Integer> pp2 = PublishProcessor.create();
  
          TestObserver<Integer> to = pp1.singleElement().takeUntil(pp2).test();
  
          assertTrue(pp1.hasSubscribers());
          assertTrue(pp2.hasSubscribers());
  
          pp1.onComplete();
  
          assertFalse(pp1.hasSubscribers());
          assertFalse(pp2.hasSubscribers());
  
          to.assertResult();
      }
  
      @Test
      public void otherCompletes() {
          PublishProcessor<Integer> pp1 = PublishProcessor.create();
          PublishProcessor<Integer> pp2 = PublishProcessor.create();
  
          TestObserver<Integer> to = pp1.singleElement().takeUntil(pp2).test();
  
          assertTrue(pp1.hasSubscribers());
          assertTrue(pp2.hasSubscribers());
  
          pp2.onComplete();
  
          assertFalse(pp1.hasSubscribers());
          assertFalse(pp2.hasSubscribers());
  
          to.assertResult();
      }
  
      @Test
      public void onErrorRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final PublishProcessor<Integer> pp1 = PublishProcessor.create();
              final PublishProcessor<Integer> pp2 = PublishProcessor.create();
  
              TestObserver<Integer> to = pp1.singleElement().takeUntil(pp2).test();
  
              final TestException ex1 = new TestException();
              final TestException ex2 = new TestException();
  
              List<Throwable> errors = TestHelper.trackPluginErrors();
              try {
  
                  Runnable r1 = new Runnable() {
                      @Override
                      public void run() {
                          pp1.onError(ex1);
                      }
                  };
                  Runnable r2 = new Runnable() {
                      @Override
                      public void run() {
                          pp2.onError(ex2);
                      }
                  };
  
                  TestHelper.race(r1, r2);
  
                  to.assertFailure(TestException.class);
  
                  if (!errors.isEmpty()) {
                      TestHelper.assertUndeliverable(errors, 0, TestException.class);
                  }
  
              } finally {
                  RxJavaPlugins.reset();
              }
  
          }
      }
  
      @Test
      public void onCompleteRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final PublishProcessor<Integer> pp1 = PublishProcessor.create();
              final PublishProcessor<Integer> pp2 = PublishProcessor.create();
  
              TestObserver<Integer> to = pp1.singleElement().takeUntil(pp2).test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      pp1.onComplete();
                  }
              };
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      pp2.onComplete();
                  }
              };
  
              TestHelper.race(r1, r2);
  
              to.assertResult();
          }
      }
  
      @Test
      public void otherSignalsAndCompletes() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              Maybe.just(1).takeUntil(Flowable.just(1).take(1))
              .test()
              .assertResult();
  
              assertTrue(errors.toString(), errors.isEmpty());
          } finally {
              RxJavaPlugins.reset();
          }
      }
  }
  