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.observable;
  
  import static org.junit.Assert.*;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.disposables.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.Action;
  import io.reactivex.rxjava3.observers.TestObserver;
  import io.reactivex.rxjava3.subjects.*;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class ObservableMergeWithCompletableTest extends RxJavaTest {
  
      @Test
      public void normal() {
          final TestObserver<Integer> to = new TestObserver<>();
  
          Observable.range(1, 5).mergeWith(
                  Completable.fromAction(new Action() {
                      @Override
                      public void run() throws Exception {
                          to.onNext(100);
                      }
                  })
          )
          .subscribe(to);
  
          to.assertResult(1, 2, 3, 4, 5, 100);
      }
  
      @Test
      public void take() {
          final TestObserver<Integer> to = new TestObserver<>();
  
          Observable.range(1, 5).mergeWith(
                  Completable.complete()
          )
          .take(3)
          .subscribe(to);
  
          to.assertResult(1, 2, 3);
      }
  
      @Test
      public void cancel() {
          final PublishSubject<Integer> ps = PublishSubject.create();
          final CompletableSubject cs = CompletableSubject.create();
  
          TestObserver<Integer> to = ps.mergeWith(cs).test();
  
          assertTrue(ps.hasObservers());
          assertTrue(cs.hasObservers());
  
          to.dispose();
  
          assertFalse(ps.hasObservers());
          assertFalse(cs.hasObservers());
      }
  
      @Test
      public void mainError() {
          Observable.error(new TestException())
          .mergeWith(Completable.complete())
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void otherError() {
          Observable.never()
          .mergeWith(Completable.error(new TestException()))
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void completeRace() {
          for (int i = 0; i < 1000; i++) {
              final PublishSubject<Integer> ps = PublishSubject.create();
              final CompletableSubject cs = CompletableSubject.create();
  
              TestObserver<Integer> to = ps.mergeWith(cs).test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      ps.onNext(1);
                      ps.onComplete();
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      cs.onComplete();
                  }
              };
  
              TestHelper.race(r1, r2);
  
              to.assertResult(1);
          }
      }
  
      @Test
      public void isDisposed() {
          new Observable<Integer>() {
              @Override
              protected void subscribeActual(Observer<? super Integer> observer) {
                  observer.onSubscribe(Disposable.empty());
  
                  assertFalse(((Disposable)observer).isDisposed());
  
                  observer.onNext(1);
  
                  assertTrue(((Disposable)observer).isDisposed());
              }
          }.mergeWith(Completable.complete())
          .take(1)
          .test()
          .assertResult(1);
      }
  
      @Test
      public void cancelOtherOnMainError() {
          PublishSubject<Integer> ps = PublishSubject.create();
          CompletableSubject cs = CompletableSubject.create();
  
          TestObserver<Integer> to = ps.mergeWith(cs).test();
  
          assertTrue(ps.hasObservers());
          assertTrue(cs.hasObservers());
  
          ps.onError(new TestException());
  
          to.assertFailure(TestException.class);
  
          assertFalse("main has observers!", ps.hasObservers());
          assertFalse("other has observers", cs.hasObservers());
      }
  
      @Test
      public void cancelMainOnOtherError() {
          PublishSubject<Integer> ps = PublishSubject.create();
          CompletableSubject cs = CompletableSubject.create();
  
          TestObserver<Integer> to = ps.mergeWith(cs).test();
  
          assertTrue(ps.hasObservers());
          assertTrue(cs.hasObservers());
  
          cs.onError(new TestException());
  
          to.assertFailure(TestException.class);
  
          assertFalse("main has observers!", ps.hasObservers());
          assertFalse("other has observers", cs.hasObservers());
      }
  
      @Test
      public void undeliverableUponCancel() {
          TestHelper.checkUndeliverableUponCancel(new ObservableConverter<Integer, Observable<Integer>>() {
              @Override
              public Observable<Integer> apply(Observable<Integer> upstream) {
                  return upstream.mergeWith(Completable.complete().hide());
              }
          });
      }
  }
  