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.junit.Assert.*;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import java.util.*;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.*;
  
  import org.junit.Test;
  import org.reactivestreams.*;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.*;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.internal.functions.Functions;
  import io.reactivex.rxjava3.internal.subscriptions.BooleanSubscription;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  import io.reactivex.rxjava3.processors.*;
  import io.reactivex.rxjava3.subscribers.*;
  import io.reactivex.rxjava3.testsupport.*;
  
  public class FlowableWindowWithFlowableTest extends RxJavaTest {
  
      @Test
      public void windowViaFlowableNormal1() {
          PublishProcessor<Integer> source = PublishProcessor.create();
          PublishProcessor<Integer> boundary = PublishProcessor.create();
  
          final Subscriber<Object> subscriber = TestHelper.mockSubscriber();
  
          final List<Subscriber<Object>> values = new ArrayList<>();
  
          Subscriber<Flowable<Integer>> wo = new DefaultSubscriber<Flowable<Integer>>() {
              @Override
              public void onNext(Flowable<Integer> args) {
                  final Subscriber<Object> mo = TestHelper.mockSubscriber();
                  values.add(mo);
  
                  args.subscribe(mo);
              }
  
              @Override
              public void onError(Throwable e) {
                  subscriber.onError(e);
              }
  
              @Override
              public void onComplete() {
                  subscriber.onComplete();
              }
          };
  
          source.window(boundary).subscribe(wo);
  
          int n = 30;
          for (int i = 0; i < n; i++) {
              source.onNext(i);
              if (i % 3 == 2 && i < n - 1) {
                  boundary.onNext(i / 3);
              }
          }
          source.onComplete();
  
          verify(subscriber, never()).onError(any(Throwable.class));
  
          assertEquals(n / 3, values.size());
  
          int j = 0;
          for (Subscriber<Object> mo : values) {
              verify(mo, never()).onError(any(Throwable.class));
              for (int i = 0; i < 3; i++) {
                  verify(mo).onNext(j + i);
              }
              verify(mo).onComplete();
              j += 3;
          }
  
          verify(subscriber).onComplete();
      }
  
      @Test
      public void windowViaFlowableBoundaryCompletes() {
          PublishProcessor<Integer> source = PublishProcessor.create();
          PublishProcessor<Integer> boundary = PublishProcessor.create();
  
          final Subscriber<Object> subscriber = TestHelper.mockSubscriber();
  
          final List<Subscriber<Object>> values = new ArrayList<>();
  
          Subscriber<Flowable<Integer>> wo = new DefaultSubscriber<Flowable<Integer>>() {
              @Override
              public void onNext(Flowable<Integer> args) {
                  final Subscriber<Object> mo = TestHelper.mockSubscriber();
                  values.add(mo);
  
                  args.subscribe(mo);
              }
  
              @Override
              public void onError(Throwable e) {
                  subscriber.onError(e);
              }
  
              @Override
              public void onComplete() {
                  subscriber.onComplete();
              }
          };
  
          source.window(boundary).subscribe(wo);
  
          int n = 30;
          for (int i = 0; i < n; i++) {
              source.onNext(i);
              if (i % 3 == 2 && i < n - 1) {
                  boundary.onNext(i / 3);
              }
          }
          boundary.onComplete();
  
          assertEquals(n / 3, values.size());
  
          int j = 0;
          for (Subscriber<Object> mo : values) {
              for (int i = 0; i < 3; i++) {
                  verify(mo).onNext(j + i);
              }
              verify(mo).onComplete();
              verify(mo, never()).onError(any(Throwable.class));
              j += 3;
          }
  
          verify(subscriber).onComplete();
          verify(subscriber, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void windowViaFlowableBoundaryThrows() {
          PublishProcessor<Integer> source = PublishProcessor.create();
          PublishProcessor<Integer> boundary = PublishProcessor.create();
  
          final Subscriber<Object> subscriber = TestHelper.mockSubscriber();
  
          final List<Subscriber<Object>> values = new ArrayList<>();
  
          Subscriber<Flowable<Integer>> wo = new DefaultSubscriber<Flowable<Integer>>() {
              @Override
              public void onNext(Flowable<Integer> args) {
                  final Subscriber<Object> mo = TestHelper.mockSubscriber();
                  values.add(mo);
  
                  args.subscribe(mo);
              }
  
              @Override
              public void onError(Throwable e) {
                  subscriber.onError(e);
              }
  
              @Override
              public void onComplete() {
                  subscriber.onComplete();
              }
          };
  
          source.window(boundary).subscribe(wo);
  
          source.onNext(0);
          source.onNext(1);
          source.onNext(2);
  
          boundary.onError(new TestException());
  
          assertEquals(1, values.size());
  
          Subscriber<Object> mo = values.get(0);
  
          verify(mo).onNext(0);
          verify(mo).onNext(1);
          verify(mo).onNext(2);
          verify(mo).onError(any(TestException.class));
  
          verify(subscriber, never()).onComplete();
          verify(subscriber).onError(any(TestException.class));
      }
  
      @Test
      public void windowViaFlowableThrows() {
          PublishProcessor<Integer> source = PublishProcessor.create();
          PublishProcessor<Integer> boundary = PublishProcessor.create();
  
          final Subscriber<Object> subscriber = TestHelper.mockSubscriber();
  
          final List<Subscriber<Object>> values = new ArrayList<>();
  
          Subscriber<Flowable<Integer>> wo = new DefaultSubscriber<Flowable<Integer>>() {
              @Override
              public void onNext(Flowable<Integer> args) {
                  final Subscriber<Object> mo = TestHelper.mockSubscriber();
                  values.add(mo);
  
                  args.subscribe(mo);
              }
  
              @Override
              public void onError(Throwable e) {
                  subscriber.onError(e);
              }
  
              @Override
              public void onComplete() {
                  subscriber.onComplete();
              }
          };
  
          source.window(boundary).subscribe(wo);
  
          source.onNext(0);
          source.onNext(1);
          source.onNext(2);
  
          source.onError(new TestException());
  
          assertEquals(1, values.size());
  
          Subscriber<Object> mo = values.get(0);
  
          verify(mo).onNext(0);
          verify(mo).onNext(1);
          verify(mo).onNext(2);
          verify(mo).onError(any(TestException.class));
  
          verify(subscriber, never()).onComplete();
          verify(subscriber).onError(any(TestException.class));
      }
  
      @Test
      public void boundaryDispose() {
          TestHelper.checkDisposed(Flowable.never().window(Flowable.never()));
      }
  
      @Test
      public void boundaryOnError() {
          TestSubscriberEx<Object> ts = Flowable.error(new TestException())
          .window(Flowable.never())
          .flatMap(Functions.<Flowable<Object>>identity(), true)
          .to(TestHelper.<Object>testConsumer())
          .assertFailure(CompositeException.class);
  
          List<Throwable> errors = TestHelper.compositeList(ts.errors().get(0));
  
          TestHelper.assertError(errors, 0, TestException.class);
      }
  
      @Test
      public void innerBadSource() {
          TestHelper.checkBadSourceFlowable(new Function<Flowable<Integer>, Object>() {
              @Override
              public Object apply(Flowable<Integer> f) throws Exception {
                  return Flowable.just(1).window(f).flatMap(new Function<Flowable<Integer>, Flowable<Integer>>() {
                      @Override
                      public Flowable<Integer> apply(Flowable<Integer> v) throws Exception {
                          return v;
                      }
                  });
              }
          }, false, 1, 1, (Object[])null);
      }
  
      @Test
      public void reentrant() {
          final FlowableProcessor<Integer> ps = PublishProcessor.<Integer>create();
  
          TestSubscriber<Integer> ts = new TestSubscriber<Integer>() {
              @Override
              public void onNext(Integer t) {
                  super.onNext(t);
                  if (t == 1) {
                      ps.onNext(2);
                      ps.onComplete();
                  }
              }
          };
  
          ps.window(BehaviorProcessor.createDefault(1))
          .flatMap(new Function<Flowable<Integer>, Flowable<Integer>>() {
              @Override
              public Flowable<Integer> apply(Flowable<Integer> v) throws Exception {
                  return v;
              }
          })
          .subscribe(ts);
  
          ps.onNext(1);
  
          ts
          .awaitDone(1, TimeUnit.SECONDS)
          .assertResult(1, 2);
      }
  
      @Test
      public void badSource() {
          TestHelper.checkBadSourceFlowable(new Function<Flowable<Object>, Object>() {
              @Override
              public Object apply(Flowable<Object> f) throws Exception {
                  return f.window(Flowable.never()).flatMap(new Function<Flowable<Object>, Flowable<Object>>() {
                      @Override
                      public Flowable<Object> apply(Flowable<Object> v) throws Exception {
                          return v;
                      }
                  });
              }
          }, false, 1, 1, 1);
      }
  
      @Test
      public void boundaryDirectMissingBackpressure() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              BehaviorProcessor.create()
              .window(Flowable.error(new TestException()))
              .test(0)
              .assertFailure(MissingBackpressureException.class);
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void boundaryDirectMissingBackpressureNoNullPointerException() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              BehaviorProcessor.createDefault(1)
              .window(Flowable.error(new TestException()))
              .test(0)
              .assertFailure(MissingBackpressureException.class);
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void boundaryDirectSecondMissingBackpressure() {
          BehaviorProcessor.createDefault(1)
          .window(Flowable.just(1))
          .test(1)
          .assertError(MissingBackpressureException.class)
          .assertNotComplete();
      }
  
      @Test
      public void boundaryDirectDoubleOnSubscribe() {
          TestHelper.checkDoubleOnSubscribeFlowable(new Function<Flowable<Object>, Publisher<Flowable<Object>>>() {
              @Override
              public Publisher<Flowable<Object>> apply(Flowable<Object> f)
                      throws Exception {
                  return f.window(Flowable.never()).takeLast(1);
              }
          });
      }
  
      @Test
      public void upstreamDisposedWhenOutputsDisposed() {
          PublishProcessor<Integer> source = PublishProcessor.create();
          PublishProcessor<Integer> boundary = PublishProcessor.create();
  
          TestSubscriber<Integer> ts = source.window(boundary)
          .take(1)
          .flatMap(new Function<Flowable<Integer>, Flowable<Integer>>() {
              @Override
              public Flowable<Integer> apply(
                      Flowable<Integer> w) throws Exception {
                  return w.take(1);
              }
          })
          .test();
  
          source.onNext(1);
  
          assertFalse("source not disposed", source.hasSubscribers());
          assertFalse("boundary not disposed", boundary.hasSubscribers());
  
          ts.assertResult(1);
      }
  
      @Test
      public void mainAndBoundaryBothError() {
          List<Throwable> errors = TestHelper.trackPluginErrors();
          try {
              final AtomicReference<Subscriber<? super Object>> ref = new AtomicReference<>();
  
              TestSubscriberEx<Flowable<Object>> ts = Flowable.error(new TestException("main"))
              .window(new Flowable<Object>() {
                  @Override
                  protected void subscribeActual(Subscriber<? super Object> subscriber) {
                      subscriber.onSubscribe(new BooleanSubscription());
                      ref.set(subscriber);
                  }
              })
              .doOnNext(new Consumer<Flowable<Object>>() {
                  @Override
                  public void accept(Flowable<Object> w) throws Throwable {
                      w.subscribe(Functions.emptyConsumer(), Functions.emptyConsumer()); // avoid abandonment
                  }
              })
              .to(TestHelper.<Flowable<Object>>testConsumer());
  
              ts
              .assertValueCount(1)
              .assertError(TestException.class)
              .assertErrorMessage("main")
              .assertNotComplete();
  
              ref.get().onError(new TestException("inner"));
  
              TestHelper.assertUndeliverable(errors, 0, TestException.class, "inner");
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void mainCompleteBoundaryErrorRace() {
          final TestException ex = new TestException();
  
          for (int i = 0; i < TestHelper.RACE_LONG_LOOPS; i++) {
              List<Throwable> errors = TestHelper.trackPluginErrors();
              try {
                  final AtomicReference<Subscriber<? super Object>> refMain = new AtomicReference<>();
                  final AtomicReference<Subscriber<? super Object>> ref = new AtomicReference<>();
  
                  TestSubscriberEx<Flowable<Object>> ts = new Flowable<Object>() {
                      @Override
                      protected void subscribeActual(Subscriber<? super Object> subscriber) {
                          subscriber.onSubscribe(new BooleanSubscription());
                          refMain.set(subscriber);
                      }
                  }
                  .window(new Flowable<Object>() {
                      @Override
                      protected void subscribeActual(Subscriber<? super Object> subscriber) {
                          subscriber.onSubscribe(new BooleanSubscription());
                          ref.set(subscriber);
                      }
                  })
                  .to(TestHelper.<Flowable<Object>>testConsumer());
  
                  Runnable r1 = new Runnable() {
                      @Override
                      public void run() {
                          refMain.get().onComplete();
                      }
                  };
                  Runnable r2 = new Runnable() {
                      @Override
                      public void run() {
                          ref.get().onError(ex);
                      }
                  };
  
                  TestHelper.race(r1, r2);
  
                  ts
                  .assertValueCount(1)
                  .assertTerminated();
  
                  if (!errors.isEmpty()) {
                      TestHelper.assertUndeliverable(errors, 0, TestException.class);
                  }
              } finally {
                  RxJavaPlugins.reset();
              }
          }
      }
  
      @Test
      public void mainNextBoundaryNextRace() {
          for (int i = 0; i < TestHelper.RACE_LONG_LOOPS; i++) {
              final AtomicReference<Subscriber<? super Object>> refMain = new AtomicReference<>();
              final AtomicReference<Subscriber<? super Object>> ref = new AtomicReference<>();
  
              TestSubscriber<Flowable<Object>> ts = new Flowable<Object>() {
                  @Override
                  protected void subscribeActual(Subscriber<? super Object> subscriber) {
                      subscriber.onSubscribe(new BooleanSubscription());
                      refMain.set(subscriber);
                  }
              }
              .window(new Flowable<Object>() {
                  @Override
                  protected void subscribeActual(Subscriber<? super Object> subscriber) {
                      subscriber.onSubscribe(new BooleanSubscription());
                      ref.set(subscriber);
                  }
              })
              .test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      refMain.get().onNext(1);
                  }
              };
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ref.get().onNext(1);
                  }
              };
  
              TestHelper.race(r1, r2);
  
              ts
              .assertValueCount(2)
              .assertNotComplete()
              .assertNoErrors();
          }
      }
  
      @Test
      public void takeOneAnotherBoundary() {
          final AtomicReference<Subscriber<? super Object>> refMain = new AtomicReference<>();
          final AtomicReference<Subscriber<? super Object>> ref = new AtomicReference<>();
  
          TestSubscriberEx<Flowable<Object>> ts = new Flowable<Object>() {
              @Override
              protected void subscribeActual(Subscriber<? super Object> subscriber) {
                  subscriber.onSubscribe(new BooleanSubscription());
                  refMain.set(subscriber);
              }
          }
          .window(new Flowable<Object>() {
              @Override
              protected void subscribeActual(Subscriber<? super Object> subscriber) {
                  subscriber.onSubscribe(new BooleanSubscription());
                  ref.set(subscriber);
              }
          })
          .to(TestHelper.<Flowable<Object>>testConsumer());
  
          ts.assertValueCount(1)
          .assertNotTerminated()
          .cancel();
  
          ref.get().onNext(1);
  
          ts.assertValueCount(1)
          .assertNotTerminated();
      }
  
      @Test
      public void disposeMainBoundaryCompleteRace() {
          for (int i = 0; i < TestHelper.RACE_LONG_LOOPS; i++) {
              final AtomicReference<Subscriber<? super Object>> refMain = new AtomicReference<>();
              final AtomicReference<Subscriber<? super Object>> ref = new AtomicReference<>();
  
              final TestSubscriber<Flowable<Object>> ts = new Flowable<Object>() {
                   @Override
                   protected void subscribeActual(Subscriber<? super Object> subscriber) {
                       subscriber.onSubscribe(new BooleanSubscription());
                       refMain.set(subscriber);
                   }
               }
               .window(new Flowable<Object>() {
                   @Override
                   protected void subscribeActual(Subscriber<? super Object> subscriber) {
                       final AtomicInteger counter = new AtomicInteger();
                       subscriber.onSubscribe(new Subscription() {
  
                           @Override
                           public void cancel() {
                               // about a microsecond
                               for (int i = 0; i < 100; i++) {
                                   counter.incrementAndGet();
                               }
                           }
  
                           @Override
                          public void request(long n) {
                          }
                       });
                       ref.set(subscriber);
                   }
               })
               .test();
  
               Runnable r1 = new Runnable() {
                   @Override
                   public void run() {
                       ts.cancel();
                   }
               };
               Runnable r2 = new Runnable() {
                   @Override
                   public void run() {
                       Subscriber<Object> subscriber = ref.get();
                       subscriber.onNext(1);
                       subscriber.onComplete();
                   }
               };
  
               TestHelper.race(r1, r2);
          }
      }
  
      @Test
      @SuppressUndeliverable
      public void disposeMainBoundaryErrorRace() {
          final TestException ex = new TestException();
  
          for (int i = 0; i < TestHelper.RACE_LONG_LOOPS; i++) {
             final AtomicReference<Subscriber<? super Object>> refMain = new AtomicReference<>();
             final AtomicReference<Subscriber<? super Object>> ref = new AtomicReference<>();
  
             final TestSubscriber<Flowable<Object>> ts = new Flowable<Object>() {
                 @Override
                 protected void subscribeActual(Subscriber<? super Object> subscriber) {
                     subscriber.onSubscribe(new BooleanSubscription());
                     refMain.set(subscriber);
                 }
             }
             .window(new Flowable<Object>() {
                 @Override
                 protected void subscribeActual(Subscriber<? super Object> subscriber) {
                     final AtomicInteger counter = new AtomicInteger();
                     subscriber.onSubscribe(new Subscription() {
  
                         @Override
                         public void cancel() {
                             // about a microsecond
                             for (int i = 0; i < 100; i++) {
                                 counter.incrementAndGet();
                             }
                         }
  
                         @Override
                        public void request(long n) {
                        }
                     });
                     ref.set(subscriber);
                 }
             })
             .test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      ts.cancel();
                  }
              };
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      Subscriber<Object> subscriber = ref.get();
                      subscriber.onNext(1);
                      subscriber.onError(ex);
                  }
              };
  
              TestHelper.race(r1, r2);
          }
      }
  
      @Test
      public void cancellingWindowCancelsUpstream() {
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          TestSubscriber<Integer> ts = pp.window(Flowable.just(1).concatWith(Flowable.<Integer>never()))
          .take(1)
          .flatMap(new Function<Flowable<Integer>, Publisher<Integer>>() {
              @Override
              public Publisher<Integer> apply(Flowable<Integer> w) throws Throwable {
                  return w.take(1);
              }
          })
          .test();
  
          assertTrue(pp.hasSubscribers());
  
          pp.onNext(1);
  
          ts
          .assertResult(1);
  
          assertFalse("Processor still has subscribers!", pp.hasSubscribers());
      }
  
      @Test
      public void windowAbandonmentCancelsUpstream() {
          PublishProcessor<Integer> pp = PublishProcessor.create();
  
          final AtomicReference<Flowable<Integer>> inner = new AtomicReference<>();
  
          TestSubscriber<Flowable<Integer>> ts = pp.window(Flowable.<Integer>never())
          .doOnNext(new Consumer<Flowable<Integer>>() {
              @Override
              public void accept(Flowable<Integer> v) throws Throwable {
                  inner.set(v);
              }
          })
          .test();
  
          assertTrue(pp.hasSubscribers());
  
          ts
          .assertValueCount(1)
          ;
  
          pp.onNext(1);
  
          assertTrue(pp.hasSubscribers());
  
          ts.cancel();
  
          ts
          .assertValueCount(1)
          .assertNoErrors()
          .assertNotComplete();
  
          assertFalse("Processor still has subscribers!", pp.hasSubscribers());
  
          inner.get().test().assertResult();
      }
  }
  