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.flowable;
  
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import org.junit.*;
  import org.reactivestreams.Subscriber;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.processors.PublishProcessor;
  import io.reactivex.rxjava3.subscribers.TestSubscriber;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class FlowableCastTest extends RxJavaTest {
  
      @Test
      public void cast() {
          Flowable<?> source = Flowable.just(1, 2);
          Flowable<Integer> flowable = source.cast(Integer.class);
  
          Subscriber<Integer> subscriber = TestHelper.mockSubscriber();
  
          flowable.subscribe(subscriber);
  
          verify(subscriber, times(1)).onNext(1);
          verify(subscriber, times(1)).onNext(1);
          verify(subscriber, never()).onError(any(Throwable.class));
          verify(subscriber, times(1)).onComplete();
      }
  
      @Test
      public void castWithWrongType() {
          Flowable<?> source = Flowable.just(1, 2);
          Flowable<Boolean> flowable = source.cast(Boolean.class);
  
          Subscriber<Boolean> subscriber = TestHelper.mockSubscriber();
  
          flowable.subscribe(subscriber);
  
          verify(subscriber, times(1)).onError(any(ClassCastException.class));
      }
  
      @Test
      public void castCrashUnsubscribes() {
  
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          TestSubscriber<String> ts = TestSubscriber.create();
  
          pp.cast(String.class).subscribe(ts);
  
          Assert.assertTrue("Not subscribed?", pp.hasSubscribers());
  
          pp.onNext(1);
  
          Assert.assertFalse("Subscribed?", pp.hasSubscribers());
  
          ts.assertError(ClassCastException.class);
      }
  }
  