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.single;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.observers.TestObserver;
  import io.reactivex.rxjava3.subjects.PublishSubject;
  import io.reactivex.rxjava3.subscribers.TestSubscriber;
  
  public class SingleCacheTest extends RxJavaTest {
  
      @Test
      public void normal() {
          Single<Integer> cache = Single.just(1).cache();
  
          cache
          .test()
          .assertResult(1);
  
          cache
          .test()
          .assertResult(1);
      }
  
      @Test
      public void error() {
          Single<Object> cache = Single.error(new TestException())
          .cache();
  
          cache
          .test()
          .assertFailure(TestException.class);
  
          cache
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void delayed() {
          PublishSubject<Integer> ps = PublishSubject.create();
          Single<Integer> cache = ps.single(-99).cache();
  
          TestObserver<Integer> to1 = cache.test();
  
          TestObserver<Integer> to2 = cache.test();
  
          ps.onNext(1);
          ps.onComplete();
  
          to1.assertResult(1);
          to2.assertResult(1);
      }
  
      @Test
      public void delayedDisposed() {
          PublishSubject<Integer> ps = PublishSubject.create();
          Single<Integer> cache = ps.single(-99).cache();
  
          TestObserver<Integer> to1 = cache.test();
  
          TestObserver<Integer> to2 = cache.test();
  
          to1.dispose();
  
          ps.onNext(1);
          ps.onComplete();
  
          to1.assertNoValues().assertNoErrors().assertNotComplete();
          to2.assertResult(1);
      }
  
      @Test
      public void crossCancel() {
          PublishSubject<Integer> ps = PublishSubject.create();
          Single<Integer> cache = ps.single(-99).cache();
  
          final TestSubscriber<Integer> ts1 = new TestSubscriber<>();
  
          TestSubscriber<Integer> ts2 = new TestSubscriber<Integer>() {
              @Override
              public void onNext(Integer t) {
                  super.onNext(t);
                  ts1.cancel();
              }
          };
  
          cache.toFlowable().subscribe(ts2);
          cache.toFlowable().subscribe(ts1);
  
          ps.onNext(1);
          ps.onComplete();
  
          ts1.assertNoValues().assertNoErrors().assertNotComplete();
          ts2.assertResult(1);
      }
  
      @Test
      public void crossCancelOnError() {
          PublishSubject<Integer> ps = PublishSubject.create();
          Single<Integer> cache = ps.single(-99).cache();
  
          final TestSubscriber<Integer> ts1 = new TestSubscriber<>();
  
          TestSubscriber<Integer> ts2 = new TestSubscriber<Integer>() {
              @Override
              public void onError(Throwable t) {
                  super.onError(t);
                  ts1.cancel();
              }
          };
  
          cache.toFlowable().subscribe(ts2);
          cache.toFlowable().subscribe(ts1);
  
          ps.onError(new TestException());
  
          ts1.assertNoValues().assertNoErrors().assertNotComplete();
          ts2.assertFailure(TestException.class);
      }
  
  }
  