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.observers;
  
  import static io.reactivex.rxjava3.internal.util.ExceptionHelper.timeoutMessage;
  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.internal.functions.Functions;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import io.reactivex.rxjava3.subjects.PublishSubject;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class FutureSingleObserverTest extends RxJavaTest {
  
      @Test
      public void cancel() {
          final Future<?> f = Single.never().toFuture();
  
          assertFalse(f.isCancelled());
          assertFalse(f.isDone());
  
          f.cancel(true);
  
          assertTrue(f.isCancelled());
          assertTrue(f.isDone());
  
          try {
              f.get();
              fail("Should have thrown!");
          } catch (CancellationException ex) {
              // expected
          } catch (InterruptedException ex) {
              throw new AssertionError(ex);
          } catch (ExecutionException ex) {
              throw new AssertionError(ex);
          }
  
          try {
              f.get(5, TimeUnit.SECONDS);
              fail("Should have thrown!");
          } catch (CancellationException ex) {
              // expected
          } catch (InterruptedException ex) {
              throw new AssertionError(ex);
          } catch (ExecutionException ex) {
              throw new AssertionError(ex);
          } catch (TimeoutException ex) {
              throw new AssertionError(ex);
          }
      }
  
      @Test
      public void cancelRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final Future<?> f = Single.never().toFuture();
  
              Runnable r = new Runnable() {
                  @Override
                  public void run() {
                      f.cancel(true);
                  }
              };
  
              TestHelper.race(r, r);
          }
      }
  
      @Test
      public void timeout() throws Exception {
  
          Future<?> f = Single.never().toFuture();
  
          try {
              f.get(100, TimeUnit.MILLISECONDS);
              fail("Should have thrown");
          } catch (TimeoutException expected) {
              assertEquals(timeoutMessage(100, TimeUnit.MILLISECONDS), expected.getMessage());
          }
      }
  
      @Test
      public void dispose() {
          Future<Integer> f = Single.just(1).toFuture();
  
          ((Disposable)f).dispose();
  
          assertTrue(((Disposable)f).isDisposed());
      }
  
      @Test
      public void errorGetWithTimeout() throws Exception {
          Future<?> f = Single.error(new TestException()).toFuture();
  
          try {
              f.get(5, TimeUnit.SECONDS);
              fail("Should have thrown");
          } catch (ExecutionException ex) {
              assertTrue(ex.toString(), ex.getCause() instanceof TestException);
          }
      }
  
      @Test
      public void normalGetWitHTimeout() throws Exception {
          Future<Integer> f = Single.just(1).toFuture();
  
          assertEquals(1, f.get(5, TimeUnit.SECONDS).intValue());
      }
  
      @Test
      public void getAwait() throws Exception {
          Future<Integer> f = Single.just(1).delay(100, TimeUnit.MILLISECONDS).toFuture();
  
          assertEquals(1, f.get(5, TimeUnit.SECONDS).intValue());
      }
  
      @Test
      public void onSuccessCancelRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final PublishSubject<Integer> ps = PublishSubject.create();
  
              final Future<?> f = ps.single(-99).toFuture();
  
              ps.onNext(1);
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      f.cancel(true);
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ps.onComplete();
                  }
              };
  
              TestHelper.race(r1, r2);
          }
      }
  
      @Test
      public void onErrorCancelRace() {
          RxJavaPlugins.setErrorHandler(Functions.emptyConsumer());
          try {
              for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
                  final PublishSubject<Integer> ps = PublishSubject.create();
  
                  final Future<?> f = ps.single(-99).toFuture();
  
                  final TestException ex = new TestException();
  
                  Runnable r1 = new Runnable() {
                      @Override
                      public void run() {
                          f.cancel(true);
                      }
                  };
  
                  Runnable r2 = new Runnable() {
                      @Override
                      public void run() {
                          ps.onError(ex);
                      }
                  };
  
                  TestHelper.race(r1, r2);
              }
          } finally {
              RxJavaPlugins.reset();
          }
      }
  }
  