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 java.lang.ref.WeakReference;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.junit.*;
  import org.reactivestreams.*;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.Function;
  import io.reactivex.rxjava3.subscribers.TestSubscriber;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class FlowableDetachTest extends RxJavaTest {
  
      Object o;
  
      @Test
      public void just() throws Exception {
          o = new Object();
  
          WeakReference<Object> wr = new WeakReference<>(o);
  
          TestSubscriber<Object> ts = new TestSubscriber<>();
  
          Flowable.just(o).count().toFlowable().onTerminateDetach().subscribe(ts);
  
          ts.assertValue(1L);
          ts.assertComplete();
          ts.assertNoErrors();
  
          o = null;
  
          System.gc();
          Thread.sleep(200);
  
          Assert.assertNull("Object retained!", wr.get());
  
      }
  
      @Test
      public void error() {
          TestSubscriber<Object> ts = new TestSubscriber<>();
  
          Flowable.error(new TestException()).onTerminateDetach().subscribe(ts);
  
          ts.assertNoValues();
          ts.assertError(TestException.class);
          ts.assertNotComplete();
      }
  
      @Test
      public void empty() {
          TestSubscriber<Object> ts = new TestSubscriber<>();
  
          Flowable.empty().onTerminateDetach().subscribe(ts);
  
          ts.assertNoValues();
          ts.assertNoErrors();
          ts.assertComplete();
      }
  
      @Test
      public void range() {
          TestSubscriber<Object> ts = new TestSubscriber<>();
  
          Flowable.range(1, 1000).onTerminateDetach().subscribe(ts);
  
          ts.assertValueCount(1000);
          ts.assertNoErrors();
          ts.assertComplete();
      }
  
      @Test
      public void backpressured() throws Exception {
          o = new Object();
  
          WeakReference<Object> wr = new WeakReference<>(o);
  
          TestSubscriber<Object> ts = new TestSubscriber<>(0L);
  
          Flowable.just(o).count().toFlowable().onTerminateDetach().subscribe(ts);
  
          ts.assertNoValues();
  
          ts.request(1);
  
          ts.assertValue(1L);
          ts.assertComplete();
          ts.assertNoErrors();
  
          o = null;
  
          System.gc();
          Thread.sleep(200);
  
          Assert.assertNull("Object retained!", wr.get());
      }
  
      @Test
      public void justUnsubscribed() throws Exception {
          o = new Object();
  
          WeakReference<Object> wr = new WeakReference<>(o);
  
          TestSubscriber<Object> ts = new TestSubscriber<>(0);
  
          Flowable.just(o).count().toFlowable().onTerminateDetach().subscribe(ts);
  
          ts.cancel();
          o = null;
  
          System.gc();
          Thread.sleep(200);
  
          Assert.assertNull("Object retained!", wr.get());
  
      }
  
      @Test
      public void deferredUpstreamProducer() {
          final AtomicReference<Subscriber<? super Object>> subscriber = new AtomicReference<>();
  
          TestSubscriber<Object> ts = new TestSubscriber<>(0);
  
          Flowable.unsafeCreate(new Publisher<Object>() {
              @Override
              public void subscribe(Subscriber<? super Object> t) {
                  subscriber.set(t);
              }
          }).onTerminateDetach().subscribe(ts);
  
          ts.request(2);
  
          new FlowableRange(1, 3).subscribe(subscriber.get());
  
          ts.assertValues(1, 2);
  
          ts.request(1);
  
          ts.assertValues(1, 2, 3);
          ts.assertComplete();
          ts.assertNoErrors();
      }
  
      @Test
      public void dispose() {
          TestHelper.checkDisposed(Flowable.never().onTerminateDetach());
      }
  
      @Test
      public void doubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeFlowable(new Function<Flowable<Object>, Flowable<Object>>() {
              @Override
              public Flowable<Object> apply(Flowable<Object> f) throws Exception {
                  return f.onTerminateDetach();
              }
          });
      }
  }
  