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.CompletableSubject;
  
  public class ObservableConcatWithCompletableTest extends RxJavaTest {
  
      @Test
      public void normal() {
          final TestObserver<Integer> to = new TestObserver<>();
  
          Observable.range(1, 5)
          .concatWith(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 mainError() {
          final TestObserver<Integer> to = new TestObserver<>();
  
          Observable.<Integer>error(new TestException())
          .concatWith(Completable.fromAction(new Action() {
              @Override
              public void run() throws Exception {
                  to.onNext(100);
              }
          }))
          .subscribe(to);
  
          to.assertFailure(TestException.class);
      }
  
      @Test
      public void otherError() {
          final TestObserver<Integer> to = new TestObserver<>();
  
          Observable.range(1, 5)
          .concatWith(Completable.error(new TestException()))
          .subscribe(to);
  
          to.assertFailure(TestException.class, 1, 2, 3, 4, 5);
      }
  
      @Test
      public void takeMain() {
          final TestObserver<Integer> to = new TestObserver<>();
  
          Observable.range(1, 5)
          .concatWith(Completable.fromAction(new Action() {
              @Override
              public void run() throws Exception {
                  to.onNext(100);
              }
          }))
          .take(3)
          .subscribe(to);
  
          to.assertResult(1, 2, 3);
      }
  
      @Test
      public void cancelOther() {
          CompletableSubject other = CompletableSubject.create();
  
          TestObserver<Object> to = Observable.empty()
                  .concatWith(other)
                  .test();
  
          assertTrue(other.hasObservers());
  
          to.dispose();
  
          assertFalse(other.hasObservers());
      }
  
      @Test
      public void badSource() {
          new Observable<Integer>() {
              @Override
              protected void subscribeActual(Observer<? super Integer> observer) {
                  Disposable bs1 = Disposable.empty();
                  observer.onSubscribe(bs1);
  
                  Disposable bs2 = Disposable.empty();
                  observer.onSubscribe(bs2);
  
                  assertFalse(bs1.isDisposed());
                  assertTrue(bs2.isDisposed());
  
                  observer.onComplete();
              }
          }.concatWith(Completable.complete())
          .test()
          .assertResult();
      }
  
      @Test
      public void consumerDisposed() {
          new Observable<Integer>() {
              @Override
              protected void subscribeActual(Observer<? super Integer> observer) {
                  Disposable bs1 = Disposable.empty();
                  observer.onSubscribe(bs1);
  
                  assertFalse(((Disposable)observer).isDisposed());
  
                  observer.onNext(1);
  
                  assertTrue(((Disposable)observer).isDisposed());
                  assertTrue(bs1.isDisposed());
              }
          }.concatWith(Completable.complete())
          .take(1)
          .test()
          .assertResult(1);
      }
  }
  