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 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.internal.functions.Functions;
  import io.reactivex.rxjava3.observers.TestObserver;
  import io.reactivex.rxjava3.processors.PublishProcessor;
  import io.reactivex.rxjava3.subscribers.TestSubscriber;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class MaybeCacheTest extends RxJavaTest {
  
      @Test
      public void offlineSuccess() {
          Maybe<Integer> source = Maybe.just(1).cache();
          assertEquals(1, source.blockingGet().intValue());
  
          source.test()
          .assertResult(1);
      }
  
      @Test
      public void offlineError() {
          Maybe<Integer> source = Maybe.<Integer>error(new TestException()).cache();
  
          try {
              source.blockingGet();
              fail("Should have thrown");
          } catch (TestException ex) {
              // expected
          }
  
          source.test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void offlineComplete() {
          Maybe<Integer> source = Maybe.<Integer>empty().cache();
  
          assertNull(source.blockingGet());
  
          source.test()
          .assertResult();
      }
  
      @Test
      public void onlineSuccess() {
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          Maybe<Integer> source = pp.singleElement().cache();
  
          assertFalse(pp.hasSubscribers());
  
          assertNotNull(((MaybeCache<Integer>)source).source.get());
  
          TestObserver<Integer> to = source.test();
  
          assertNull(((MaybeCache<Integer>)source).source.get());
  
          assertTrue(pp.hasSubscribers());
  
          source.test(true).assertEmpty();
  
          to.assertEmpty();
  
          pp.onNext(1);
          pp.onComplete();
  
          to.assertResult(1);
  
          source.test().assertResult(1);
  
          source.test(true).assertEmpty();
      }
  
      @Test
      public void onlineError() {
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          Maybe<Integer> source = pp.singleElement().cache();
  
          assertFalse(pp.hasSubscribers());
  
          assertNotNull(((MaybeCache<Integer>)source).source.get());
  
          TestObserver<Integer> to = source.test();
  
          assertNull(((MaybeCache<Integer>)source).source.get());
  
          assertTrue(pp.hasSubscribers());
  
          source.test(true).assertEmpty();
  
          to.assertEmpty();
  
          pp.onError(new TestException());
  
          to.assertFailure(TestException.class);
  
          source.test().assertFailure(TestException.class);
  
          source.test(true).assertEmpty();
      }
  
      @Test
      public void onlineComplete() {
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          Maybe<Integer> source = pp.singleElement().cache();
  
          assertFalse(pp.hasSubscribers());
  
          assertNotNull(((MaybeCache<Integer>)source).source.get());
  
          TestObserver<Integer> to = source.test();
  
          assertNull(((MaybeCache<Integer>)source).source.get());
  
          assertTrue(pp.hasSubscribers());
  
          source.test(true).assertEmpty();
  
          to.assertEmpty();
  
          pp.onComplete();
  
          to.assertResult();
  
          source.test().assertResult();
  
          source.test(true).assertEmpty();
      }
  
      @Test
      public void crossCancelOnSuccess() {
  
          final TestSubscriber<Integer> ts = new TestSubscriber<>();
  
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          Maybe<Integer> source = pp.singleElement().cache();
  
          source.subscribe(new Consumer<Integer>() {
              @Override
              public void accept(Integer v) throws Exception {
                  ts.cancel();
              }
          });
  
          source.toFlowable().subscribe(ts);
  
          pp.onNext(1);
          pp.onComplete();
  
          ts.assertEmpty();
      }
  
      @Test
      public void crossCancelOnError() {
  
          final TestSubscriber<Integer> ts = new TestSubscriber<>();
  
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          Maybe<Integer> source = pp.singleElement().cache();
  
          source.subscribe(Functions.emptyConsumer(), new Consumer<Object>() {
              @Override
              public void accept(Object v) throws Exception {
                  ts.cancel();
              }
          });
  
          source.toFlowable().subscribe(ts);
  
          pp.onError(new TestException());
  
          ts.assertEmpty();
      }
  
      @Test
      public void crossCancelOnComplete() {
  
          final TestSubscriber<Integer> ts = new TestSubscriber<>();
  
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          Maybe<Integer> source = pp.singleElement().cache();
  
          source.subscribe(Functions.emptyConsumer(), Functions.emptyConsumer(), new Action() {
              @Override
              public void run() throws Exception {
                  ts.cancel();
              }
          });
  
          source.toFlowable().subscribe(ts);
  
          pp.onComplete();
  
          ts.assertEmpty();
      }
  
      @Test
      public void addAddRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              PublishProcessor<Integer> pp = PublishProcessor.create();
  
              final Maybe<Integer> source = pp.singleElement().cache();
  
              Runnable r = new Runnable() {
                  @Override
                  public void run() {
                      source.test();
                  }
              };
  
              TestHelper.race(r, r);
          }
      }
  
      @Test
      public void removeRemoveRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              PublishProcessor<Integer> pp = PublishProcessor.create();
  
              final Maybe<Integer> source = pp.singleElement().cache();
  
              final TestObserver<Integer> to1 = source.test();
              final TestObserver<Integer> to2 = source.test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      to1.dispose();
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      to2.dispose();
                  }
              };
  
              TestHelper.race(r1, r2);
          }
      }
  
      @Test
      public void doubleDispose() {
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          final Maybe<Integer> source = pp.singleElement().cache();
  
          final Disposable[] dout = { null };
  
          source.subscribe(new MaybeObserver<Integer>() {
  
              @Override
              public void onSubscribe(Disposable d) {
                  dout[0] = d;
              }
  
              @Override
              public void onSuccess(Integer value) {
  
              }
  
              @Override
              public void onError(Throwable e) {
  
              }
  
              @Override
              public void onComplete() {
  
              }
  
          });
  
          dout[0].dispose();
          dout[0].dispose();
      }
  }
  