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.concurrent.*;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.disposables.Disposable;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.processors.PublishProcessor;
  import io.reactivex.rxjava3.schedulers.Schedulers;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class MaybeUnsubscribeOnTest extends RxJavaTest {
  
      @Test
      public void normal() throws Exception {
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          final String[] name = { null };
  
          final CountDownLatch cdl = new CountDownLatch(1);
  
          pp.doOnCancel(new Action() {
              @Override
              public void run() throws Exception {
                  name[0] = Thread.currentThread().getName();
                  cdl.countDown();
              }
          })
          .singleElement()
          .unsubscribeOn(Schedulers.single())
          .test(true)
          ;
  
          assertTrue(cdl.await(5, TimeUnit.SECONDS));
  
          int times = 10;
  
          while (times-- > 0 && pp.hasSubscribers()) {
              Thread.sleep(100);
          }
  
          assertFalse(pp.hasSubscribers());
  
          assertNotEquals(Thread.currentThread().getName(), name[0]);
      }
  
      @Test
      public void just() {
          Maybe.just(1)
          .unsubscribeOn(Schedulers.single())
          .test()
          .assertResult(1);
      }
  
      @Test
      public void error() {
          Maybe.<Integer>error(new TestException())
          .unsubscribeOn(Schedulers.single())
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void empty() {
          Maybe.empty()
          .unsubscribeOn(Schedulers.single())
          .test()
          .assertResult();
      }
  
      @Test
      public void dispose() {
          TestHelper.checkDisposed(Maybe.just(1)
          .unsubscribeOn(Schedulers.single()));
      }
  
      @Test
      public void doubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeMaybe(new Function<Maybe<Object>, MaybeSource<Object>>() {
              @Override
              public MaybeSource<Object> apply(Maybe<Object> v) throws Exception {
                  return v.unsubscribeOn(Schedulers.single());
              }
          });
      }
  
      @Test
      public void disposeRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              PublishProcessor<Integer> pp = PublishProcessor.create();
  
              final Disposable[] ds = { null };
              pp.singleElement().unsubscribeOn(Schedulers.computation())
              .subscribe(new MaybeObserver<Integer>() {
                  @Override
                  public void onSubscribe(Disposable d) {
                      ds[0] = d;
                  }
  
                  @Override
                  public void onSuccess(Integer value) {
  
                  }
  
                  @Override
                  public void onError(Throwable e) {
  
                  }
  
                  @Override
                  public void onComplete() {
  
                  }
              });
  
              Runnable r = new Runnable() {
                  @Override
                  public void run() {
                      ds[0].dispose();
                  }
              };
  
              TestHelper.race(r, r);
          }
      }
  }
  