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.completable;
  
  import static org.junit.Assert.assertEquals;
  
  import java.io.IOException;
  
  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.internal.functions.Functions;
  import io.reactivex.rxjava3.subjects.CompletableSubject;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class CompletableOnErrorXTest extends RxJavaTest {
  
      @Test
      public void normalReturn() {
          Completable.complete()
          .onErrorComplete()
          .test()
          .assertResult();
      }
  
      @Test
      public void normalResumeNext() {
          final int[] call = { 0 };
          Completable.complete()
          .onErrorResumeNext(new Function<Throwable, CompletableSource>() {
              @Override
              public CompletableSource apply(Throwable e) throws Exception {
                  call[0]++;
                  return Completable.complete();
              }
          })
          .test()
          .assertResult();
  
          assertEquals(0, call[0]);
      }
  
      @Test
      public void onErrorReturnConst() {
          Completable.error(new TestException())
          .onErrorReturnItem(1)
          .test()
          .assertResult(1);
      }
  
      @Test
      public void onErrorReturn() {
          Completable.error(new TestException())
          .onErrorReturn(Functions.justFunction(1))
          .test()
          .assertResult(1);
      }
  
      @Test
      public void onErrorReturnFunctionThrows() {
          TestHelper.assertCompositeExceptions(Completable.error(new TestException())
          .onErrorReturn(new Function<Throwable, Object>() {
              @Override
              public Object apply(Throwable v) throws Exception {
                  throw new IOException();
              }
          })
          .to(TestHelper.testConsumer()), TestException.class, IOException.class);
      }
  
      @Test
      public void onErrorReturnEmpty() {
          Completable.complete()
          .onErrorReturnItem(2)
          .test()
          .assertResult();
      }
  
      @Test
      public void onErrorReturnDispose() {
          TestHelper.checkDisposed(CompletableSubject.create().onErrorReturnItem(1));
      }
  
      @Test
      public void onErrorReturnDoubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeCompletableToMaybe(new Function<Completable, MaybeSource<Object>>() {
              @Override
              public MaybeSource<Object> apply(Completable v) throws Exception {
                  return v.onErrorReturnItem(1);
              }
          });
      }
  }
  