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.disposables;
  
  import static org.junit.Assert.*;
  
  import java.util.List;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.RxJavaTest;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.Cancellable;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class CancellableDisposableTest extends RxJavaTest {
  
      @Test
      public void normal() {
          final AtomicInteger count = new AtomicInteger();
  
          Cancellable c = new Cancellable() {
              @Override
              public void cancel() throws Exception {
                  count.getAndIncrement();
              }
          };
  
          CancellableDisposable cd = new CancellableDisposable(c);
  
          assertFalse(cd.isDisposed());
  
          cd.dispose();
          cd.dispose();
  
          assertTrue(cd.isDisposed());
  
          assertEquals(1, count.get());
      }
  
      @Test
      public void cancelThrows() {
          final AtomicInteger count = new AtomicInteger();
  
          Cancellable c = new Cancellable() {
              @Override
              public void cancel() throws Exception {
                  count.getAndIncrement();
                  throw new TestException();
              }
          };
  
          CancellableDisposable cd = new CancellableDisposable(c);
  
          assertFalse(cd.isDisposed());
  
          List<Throwable> list = TestHelper.trackPluginErrors();
          try {
              cd.dispose();
              cd.dispose();
  
              TestHelper.assertUndeliverable(list, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
          assertTrue(cd.isDisposed());
  
          assertEquals(1, count.get());
      }
  
      @Test
      public void disposeRace() {
  
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final AtomicInteger count = new AtomicInteger();
  
              Cancellable c = new Cancellable() {
                  @Override
                  public void cancel() throws Exception {
                      count.getAndIncrement();
                  }
              };
  
              final CancellableDisposable cd = new CancellableDisposable(c);
  
              Runnable r = new Runnable() {
                  @Override
                  public void run() {
                      cd.dispose();
                  }
              };
  
              TestHelper.race(r, r);
  
              assertEquals(1, count.get());
          }
      }
  
  }
  