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.schedulers;
  
  import static org.junit.Assert.*;
  
  import java.util.concurrent.TimeUnit;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.core.Scheduler.Worker;
  import io.reactivex.rxjava3.disposables.*;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.internal.schedulers.IoScheduler;
  import io.reactivex.rxjava3.testsupport.SuppressUndeliverable;
  
  public class CachedThreadSchedulerTest extends AbstractSchedulerConcurrencyTests {
  
      @Override
      protected Scheduler getScheduler() {
          return Schedulers.io();
      }
  
      /**
       * IO scheduler defaults to using CachedThreadScheduler.
       */
      @Test
      public final void iOScheduler() {
  
          Flowable<Integer> f1 = Flowable.just(1, 2, 3, 4, 5);
          Flowable<Integer> f2 = Flowable.just(6, 7, 8, 9, 10);
          Flowable<String> f = Flowable.merge(f1, f2).map(new Function<Integer, String>() {
  
              @Override
              public String apply(Integer t) {
                  assertTrue(Thread.currentThread().getName().startsWith("RxCachedThreadScheduler"));
                  return "Value_" + t + "_Thread_" + Thread.currentThread().getName();
              }
          });
  
          f.subscribeOn(Schedulers.io()).blockingForEach(new Consumer<String>() {
  
              @Override
              public void accept(String t) {
                  System.out.println("t: " + t);
              }
          });
      }
  
      @Test
      public final void handledErrorIsNotDeliveredToThreadHandler() throws InterruptedException {
          SchedulerTestHelper.handledErrorIsNotDeliveredToThreadHandler(getScheduler());
      }
  
      @Test
      public void cancelledTaskRetention() throws InterruptedException {
          Worker w = Schedulers.io().createWorker();
          try {
              ExecutorSchedulerTest.cancelledRetention(w, false);
          } finally {
              w.dispose();
          }
          w = Schedulers.io().createWorker();
          try {
              ExecutorSchedulerTest.cancelledRetention(w, true);
          } finally {
              w.dispose();
          }
      }
  
      @Test
      public void workerDisposed() {
          Worker w = Schedulers.io().createWorker();
  
          assertFalse(((Disposable)w).isDisposed());
  
          w.dispose();
  
          assertTrue(((Disposable)w).isDisposed());
      }
  
      @Test
      @SuppressUndeliverable
      public void shutdownRejects() {
          final int[] calls = { 0 };
  
          Runnable r = new Runnable() {
              @Override
              public void run() {
                  calls[0]++;
              }
          };
  
          IoScheduler s = new IoScheduler();
          s.shutdown();
          s.shutdown();
  
          s.scheduleDirect(r);
  
          s.scheduleDirect(r, 1, TimeUnit.SECONDS);
  
          s.schedulePeriodicallyDirect(r, 1, 1, TimeUnit.SECONDS);
  
          Worker w = s.createWorker();
          w.dispose();
  
          assertEquals(Disposable.disposed(), w.schedule(r));
  
          assertEquals(Disposable.disposed(), w.schedule(r, 1, TimeUnit.SECONDS));
  
          assertEquals(Disposable.disposed(), w.schedulePeriodically(r, 1, 1, TimeUnit.SECONDS));
  
          assertEquals(0, calls[0]);
      }
  }
  