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 java.util.*;
  import java.util.concurrent.*;
  
  import org.junit.*;
  import org.mockito.Mockito;
  import org.reactivestreams.Subscriber;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.internal.util.ExceptionHelper;
  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 FlowableToListTest extends RxJavaTest {
  
      @Test
      public void listFlowable() {
          Flowable<String> w = Flowable.fromIterable(Arrays.asList("one", "two", "three"));
          Flowable<List<String>> flowable = w.toList().toFlowable();
  
          Subscriber<List<String>> subscriber = TestHelper.mockSubscriber();
          flowable.subscribe(subscriber);
  
          verify(subscriber, times(1)).onNext(Arrays.asList("one", "two", "three"));
          verify(subscriber, Mockito.never()).onError(any(Throwable.class));
          verify(subscriber, times(1)).onComplete();
      }
  
      @Test
      public void listViaFlowableFlowable() {
          Flowable<String> w = Flowable.fromIterable(Arrays.asList("one", "two", "three"));
          Flowable<List<String>> flowable = w.toList().toFlowable();
  
          Subscriber<List<String>> subscriber = TestHelper.mockSubscriber();
          flowable.subscribe(subscriber);
  
          verify(subscriber, times(1)).onNext(Arrays.asList("one", "two", "three"));
          verify(subscriber, Mockito.never()).onError(any(Throwable.class));
          verify(subscriber, times(1)).onComplete();
      }
  
      @Test
      public void listMultipleSubscribersFlowable() {
          Flowable<String> w = Flowable.fromIterable(Arrays.asList("one", "two", "three"));
          Flowable<List<String>> flowable = w.toList().toFlowable();
  
          Subscriber<List<String>> subscriber1 = TestHelper.mockSubscriber();
          flowable.subscribe(subscriber1);
  
          Subscriber<List<String>> subscriber2 = TestHelper.mockSubscriber();
          flowable.subscribe(subscriber2);
  
          List<String> expected = Arrays.asList("one", "two", "three");
  
          verify(subscriber1, times(1)).onNext(expected);
          verify(subscriber1, Mockito.never()).onError(any(Throwable.class));
          verify(subscriber1, times(1)).onComplete();
  
          verify(subscriber2, times(1)).onNext(expected);
          verify(subscriber2, Mockito.never()).onError(any(Throwable.class));
          verify(subscriber2, times(1)).onComplete();
      }
  
      @Test
      public void listWithBlockingFirstFlowable() {
          Flowable<String> f = Flowable.fromIterable(Arrays.asList("one", "two", "three"));
          List<String> actual = f.toList().toFlowable().blockingFirst();
          Assert.assertEquals(Arrays.asList("one", "two", "three"), actual);
      }
  
      @Test
      public void backpressureHonoredFlowable() {
          Flowable<List<Integer>> w = Flowable.just(1, 2, 3, 4, 5).toList().toFlowable();
          TestSubscriber<List<Integer>> ts = new TestSubscriber<>(0L);
  
          w.subscribe(ts);
  
          ts.assertNoValues();
          ts.assertNoErrors();
          ts.assertNotComplete();
  
          ts.request(1);
  
          ts.assertValue(Arrays.asList(1, 2, 3, 4, 5));
          ts.assertNoErrors();
          ts.assertComplete();
  
          ts.request(1);
  
          ts.assertValue(Arrays.asList(1, 2, 3, 4, 5));
          ts.assertNoErrors();
          ts.assertComplete();
      }
  
      @Test
      public void capacityHintFlowable() {
          Flowable.range(1, 10)
          .toList(4)
          .toFlowable()
          .test()
          .assertResult(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
      }
  
      @Test
      public void list() {
          Flowable<String> w = Flowable.fromIterable(Arrays.asList("one", "two", "three"));
          Single<List<String>> single = w.toList();
  
          SingleObserver<List<String>> observer = TestHelper.mockSingleObserver();
          single.subscribe(observer);
          verify(observer, times(1)).onSuccess(Arrays.asList("one", "two", "three"));
          verify(observer, Mockito.never()).onError(any(Throwable.class));
      }
  
      @Test
      public void listViaFlowable() {
          Flowable<String> w = Flowable.fromIterable(Arrays.asList("one", "two", "three"));
          Single<List<String>> single = w.toList();
  
          SingleObserver<List<String>> observer = TestHelper.mockSingleObserver();
          single.subscribe(observer);
          verify(observer, times(1)).onSuccess(Arrays.asList("one", "two", "three"));
          verify(observer, Mockito.never()).onError(any(Throwable.class));
      }
  
      @Test
      public void listMultipleSubscribers() {
          Flowable<String> w = Flowable.fromIterable(Arrays.asList("one", "two", "three"));
          Single<List<String>> single = w.toList();
  
          SingleObserver<List<String>> o1 = TestHelper.mockSingleObserver();
          single.subscribe(o1);
  
          SingleObserver<List<String>> o2 = TestHelper.mockSingleObserver();
          single.subscribe(o2);
  
          List<String> expected = Arrays.asList("one", "two", "three");
  
          verify(o1, times(1)).onSuccess(expected);
          verify(o1, Mockito.never()).onError(any(Throwable.class));
  
          verify(o2, times(1)).onSuccess(expected);
          verify(o2, Mockito.never()).onError(any(Throwable.class));
      }
  
      @Test
      public void listWithBlockingFirst() {
          Flowable<String> f = Flowable.fromIterable(Arrays.asList("one", "two", "three"));
          List<String> actual = f.toList().blockingGet();
          Assert.assertEquals(Arrays.asList("one", "two", "three"), actual);
      }
  
      static void await(CyclicBarrier cb) {
          try {
              cb.await();
          } catch (InterruptedException ex) {
              ex.printStackTrace();
          } catch (BrokenBarrierException ex) {
              ex.printStackTrace();
          }
      }
  
      @Test
      public void capacityHint() {
          Flowable.range(1, 10)
          .toList(4)
          .test()
          .assertResult(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
      }
  
      @Test
      public void dispose() {
          TestHelper.checkDisposed(Flowable.just(1).toList().toFlowable());
  
          TestHelper.checkDisposed(Flowable.just(1).toList());
      }
  
      @Test
      public void error() {
          Flowable.error(new TestException())
          .toList()
          .toFlowable()
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void errorSingle() {
          Flowable.error(new TestException())
          .toList()
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void collectionSupplierThrows() {
          Flowable.just(1)
          .toList(new Supplier<Collection<Integer>>() {
              @Override
              public Collection<Integer> get() throws Exception {
                  throw new TestException();
              }
          })
          .toFlowable()
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void collectionSupplierReturnsNull() {
          Flowable.just(1)
          .toList(new Supplier<Collection<Integer>>() {
              @Override
              public Collection<Integer> get() throws Exception {
                  return null;
              }
          })
          .toFlowable()
          .to(TestHelper.<Collection<Integer>>testConsumer())
          .assertFailure(NullPointerException.class)
          .assertErrorMessage(ExceptionHelper.nullWarning("The collectionSupplier returned a null Collection."));
      }
  
      @Test
      public void singleCollectionSupplierThrows() {
          Flowable.just(1)
          .toList(new Supplier<Collection<Integer>>() {
              @Override
              public Collection<Integer> get() throws Exception {
                  throw new TestException();
              }
          })
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void singleCollectionSupplierReturnsNull() {
          Flowable.just(1)
          .toList(new Supplier<Collection<Integer>>() {
              @Override
              public Collection<Integer> get() throws Exception {
                  return null;
              }
          })
          .to(TestHelper.<Collection<Integer>>testConsumer())
          .assertFailure(NullPointerException.class)
          .assertErrorMessage(ExceptionHelper.nullWarning("The collectionSupplier returned a null Collection."));
      }
  
      @Test
      public void onNextCancelRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final PublishProcessor<Integer> pp = PublishProcessor.create();
              final TestObserver<List<Integer>> to = pp.toList().test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      pp.onNext(1);
                  }
              };
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      to.dispose();
                  }
              };
  
              TestHelper.race(r1, r2);
          }
      }
  
      @Test
      public void onNextCancelRaceFlowable() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final PublishProcessor<Integer> pp = PublishProcessor.create();
              final TestSubscriber<List<Integer>> ts = pp.toList().toFlowable().test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      pp.onNext(1);
                  }
              };
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ts.cancel();
                  }
              };
  
              TestHelper.race(r1, r2);
          }
  
      }
  
      @Test
      public void onCompleteCancelRaceFlowable() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
              final PublishProcessor<Integer> pp = PublishProcessor.create();
              final TestSubscriber<List<Integer>> ts = pp.toList().toFlowable().test();
  
              pp.onNext(1);
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      pp.onComplete();
                  }
              };
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ts.cancel();
                  }
              };
  
              TestHelper.race(r1, r2);
  
              if (ts.values().size() != 0) {
                  ts.assertValue(Arrays.asList(1))
                  .assertNoErrors();
              }
          }
      }
  
      @Test
      public void doubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeFlowable(new Function<Flowable<Object>, Flowable<List<Object>>>() {
              @Override
              public Flowable<List<Object>> apply(Flowable<Object> f)
                      throws Exception {
                  return f.toList().toFlowable();
              }
          });
          TestHelper.checkDoubleOnSubscribeFlowableToSingle(new Function<Flowable<Object>, Single<List<Object>>>() {
              @Override
              public Single<List<Object>> apply(Flowable<Object> f)
                      throws Exception {
                  return f.toList();
              }
          });
      }
  }
  