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.assertEquals;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import java.io.IOException;
  import java.util.*;
  import java.util.concurrent.*;
  import java.util.concurrent.atomic.*;
  
  import org.junit.Test;
  import org.mockito.InOrder;
  import org.reactivestreams.*;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.disposables.Disposable;
  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.PublishProcessor;
  import io.reactivex.rxjava3.subscribers.TestSubscriber;
  import io.reactivex.rxjava3.testsupport.*;
  
  public class FlowableRetryWithPredicateTest extends RxJavaTest {
      BiPredicate<Integer, Throwable> retryTwice = new BiPredicate<Integer, Throwable>() {
          @Override
          public boolean test(Integer t1, Throwable t2) {
              return t1 <= 2;
          }
      };
      BiPredicate<Integer, Throwable> retry5 = new BiPredicate<Integer, Throwable>() {
          @Override
          public boolean test(Integer t1, Throwable t2) {
              return t1 <= 5;
          }
      };
      BiPredicate<Integer, Throwable> retryOnTestException = new BiPredicate<Integer, Throwable>() {
          @Override
          public boolean test(Integer t1, Throwable t2) {
              return t2 instanceof IOException;
          }
      };
      @Test
      public void withNothingToRetry() {
          Flowable<Integer> source = Flowable.range(0, 3);
  
          Subscriber<Integer> subscriber = TestHelper.mockSubscriber();
          InOrder inOrder = inOrder(subscriber);
  
          source.retry(retryTwice).subscribe(subscriber);
  
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(2);
          inOrder.verify(subscriber).onComplete();
          verify(subscriber, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void retryTwice() {
          Flowable<Integer> source = Flowable.unsafeCreate(new Publisher<Integer>() {
              int count;
              @Override
              public void subscribe(Subscriber<? super Integer> t1) {
                  t1.onSubscribe(new BooleanSubscription());
                  count++;
                  t1.onNext(0);
                  t1.onNext(1);
                  if (count == 1) {
                      t1.onError(new TestException());
                      return;
                  }
                  t1.onNext(2);
                  t1.onNext(3);
                  t1.onComplete();
              }
          });
  
          Subscriber<Integer> subscriber = TestHelper.mockSubscriber();
          InOrder inOrder = inOrder(subscriber);
  
          source.retry(retryTwice).subscribe(subscriber);
  
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(2);
          inOrder.verify(subscriber).onNext(3);
          inOrder.verify(subscriber).onComplete();
          verify(subscriber, never()).onError(any(Throwable.class));
  
      }
  
      @Test
      public void retryTwiceAndGiveUp() {
          Flowable<Integer> source = Flowable.unsafeCreate(new Publisher<Integer>() {
              @Override
              public void subscribe(Subscriber<? super Integer> t1) {
                  t1.onSubscribe(new BooleanSubscription());
                  t1.onNext(0);
                  t1.onNext(1);
                  t1.onError(new TestException());
              }
          });
  
          Subscriber<Integer> subscriber = TestHelper.mockSubscriber();
          InOrder inOrder = inOrder(subscriber);
  
          source.retry(retryTwice).subscribe(subscriber);
  
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onError(any(TestException.class));
          verify(subscriber, never()).onComplete();
  
      }
  
      @Test
      public void retryOnSpecificException() {
          Flowable<Integer> source = Flowable.unsafeCreate(new Publisher<Integer>() {
              int count;
              @Override
              public void subscribe(Subscriber<? super Integer> t1) {
                  t1.onSubscribe(new BooleanSubscription());
                  count++;
                  t1.onNext(0);
                  t1.onNext(1);
                  if (count == 1) {
                      t1.onError(new IOException());
                      return;
                  }
                  t1.onNext(2);
                  t1.onNext(3);
                  t1.onComplete();
              }
          });
  
          Subscriber<Integer> subscriber = TestHelper.mockSubscriber();
          InOrder inOrder = inOrder(subscriber);
  
          source.retry(retryOnTestException).subscribe(subscriber);
  
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(2);
          inOrder.verify(subscriber).onNext(3);
          inOrder.verify(subscriber).onComplete();
          verify(subscriber, never()).onError(any(Throwable.class));
      }
  
      @Test
      public void retryOnSpecificExceptionAndNotOther() {
          final IOException ioe = new IOException();
          final TestException te = new TestException();
          Flowable<Integer> source = Flowable.unsafeCreate(new Publisher<Integer>() {
              int count;
              @Override
              public void subscribe(Subscriber<? super Integer> t1) {
                  t1.onSubscribe(new BooleanSubscription());
                  count++;
                  t1.onNext(0);
                  t1.onNext(1);
                  if (count == 1) {
                      t1.onError(ioe);
                      return;
                  }
                  t1.onNext(2);
                  t1.onNext(3);
                  t1.onError(te);
              }
          });
  
          Subscriber<Integer> subscriber = TestHelper.mockSubscriber();
          InOrder inOrder = inOrder(subscriber);
  
          source.retry(retryOnTestException).subscribe(subscriber);
  
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(0);
          inOrder.verify(subscriber).onNext(1);
          inOrder.verify(subscriber).onNext(2);
          inOrder.verify(subscriber).onNext(3);
          inOrder.verify(subscriber).onError(te);
          verify(subscriber, never()).onError(ioe);
          verify(subscriber, never()).onComplete();
      }
  
      @Test
      public void unsubscribeFromRetry() {
          PublishProcessor<Integer> processor = PublishProcessor.create();
          final AtomicInteger count = new AtomicInteger(0);
          Disposable sub = processor.retry(retryTwice).subscribe(new Consumer<Integer>() {
              @Override
              public void accept(Integer n) {
                  count.incrementAndGet();
              }
          });
          processor.onNext(1);
          sub.dispose();
          processor.onNext(2);
          assertEquals(1, count.get());
      }
  
      @Test
      public void unsubscribeAfterError() {
  
          Subscriber<Long> subscriber = TestHelper.mockSubscriber();
  
          // Flowable that always fails after 100ms
          FlowableRetryTest.SlowFlowable so = new FlowableRetryTest.SlowFlowable(100, 0, "testUnsubscribeAfterError");
          Flowable<Long> f = Flowable
                  .unsafeCreate(so)
                  .retry(retry5);
  
          FlowableRetryTest.AsyncSubscriber<Long> async = new FlowableRetryTest.AsyncSubscriber<>(subscriber);
  
          f.subscribe(async);
  
          async.await();
  
          InOrder inOrder = inOrder(subscriber);
          // Should fail once
          inOrder.verify(subscriber, times(1)).onError(any(Throwable.class));
          inOrder.verify(subscriber, never()).onComplete();
  
          assertEquals("Start 6 threads, retry 5 then fail on 6", 6, so.efforts.get());
          assertEquals("Only 1 active subscription", 1, so.maxActive.get());
      }
  
      @Test
      public void timeoutWithRetry() {
  
          Subscriber<Long> subscriber = TestHelper.mockSubscriber();
  
          // Flowable that sends every 100ms (timeout fails instead)
          FlowableRetryTest.SlowFlowable so = new FlowableRetryTest.SlowFlowable(100, 10, "testTimeoutWithRetry");
          Flowable<Long> f = Flowable
                  .unsafeCreate(so)
                  .timeout(80, TimeUnit.MILLISECONDS)
                  .retry(retry5);
  
          FlowableRetryTest.AsyncSubscriber<Long> async = new FlowableRetryTest.AsyncSubscriber<>(subscriber);
  
          f.subscribe(async);
  
          async.await();
  
          InOrder inOrder = inOrder(subscriber);
          // Should fail once
          inOrder.verify(subscriber, times(1)).onError(any(Throwable.class));
          inOrder.verify(subscriber, never()).onComplete();
  
          assertEquals("Start 6 threads, retry 5 then fail on 6", 6, so.efforts.get());
      }
  
      @Test
      public void issue2826() {
          TestSubscriberEx<Integer> ts = new TestSubscriberEx<>();
          final RuntimeException e = new RuntimeException("You shall not pass");
          final AtomicInteger c = new AtomicInteger();
          Flowable.just(1).map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer t1) {
                  c.incrementAndGet();
                  throw e;
              }
          }).retry(retry5).subscribe(ts);
  
          ts.assertTerminated();
          assertEquals(6, c.get());
          assertEquals(Collections.singletonList(e), ts.errors());
      }
  
      @Test
      public void justAndRetry() throws Exception {
          final AtomicBoolean throwException = new AtomicBoolean(true);
          int value = Flowable.just(1).map(new Function<Integer, Integer>() {
              @Override
              public Integer apply(Integer t1) {
                  if (throwException.compareAndSet(true, false)) {
                      throw new TestException();
                  }
                  return t1;
              }
          }).retry(1).blockingSingle();
  
          assertEquals(1, value);
      }
  
      @Test
      public void issue3008RetryWithPredicate() {
          final List<Long> list = new CopyOnWriteArrayList<>();
          final AtomicBoolean isFirst = new AtomicBoolean(true);
          Flowable.<Long> just(1L, 2L, 3L).map(new Function<Long, Long>() {
              @Override
              public Long apply(Long x) {
                  System.out.println("map " + x);
                  if (x == 2 && isFirst.getAndSet(false)) {
                      throw new RuntimeException("retryable error");
                  }
                  return x;
              }})
          .retry(new BiPredicate<Integer, Throwable>() {
              @Override
              public boolean test(Integer t1, Throwable t2) {
                  return true;
              }})
          .forEach(new Consumer<Long>() {
  
              @Override
              public void accept(Long t) {
                  System.out.println(t);
                  list.add(t);
              }});
          assertEquals(Arrays.asList(1L, 1L, 2L, 3L), list);
      }
  
      @Test
      public void issue3008RetryInfinite() {
          final List<Long> list = new CopyOnWriteArrayList<>();
          final AtomicBoolean isFirst = new AtomicBoolean(true);
          Flowable.<Long> just(1L, 2L, 3L).map(new Function<Long, Long>() {
              @Override
              public Long apply(Long x) {
                  System.out.println("map " + x);
                  if (x == 2 && isFirst.getAndSet(false)) {
                      throw new RuntimeException("retryable error");
                  }
                  return x;
              }})
          .retry()
          .forEach(new Consumer<Long>() {
  
              @Override
              public void accept(Long t) {
                  System.out.println(t);
                  list.add(t);
              }});
          assertEquals(Arrays.asList(1L, 1L, 2L, 3L), list);
      }
  
      @Test
      public void backpressure() {
          final List<Long> requests = new ArrayList<>();
  
          Flowable<Integer> source = Flowable
                  .just(1)
                  .concatWith(Flowable.<Integer>error(new TestException()))
                  .doOnRequest(new LongConsumer() {
                      @Override
                      public void accept(long t) {
                          requests.add(t);
                      }
                  });
  
          TestSubscriber<Integer> ts = new TestSubscriber<>(3L);
          source
          .retry(new BiPredicate<Integer, Throwable>() {
              @Override
              public boolean test(Integer t1, Throwable t2) {
                  return t1 < 4; // FIXME was 3 in 1.x for some reason
              }
          }).subscribe(ts);
  
          assertEquals(Arrays.asList(3L, 2L, 1L), requests);
          ts.assertValues(1, 1, 1);
          ts.assertNotComplete();
          ts.assertNoErrors();
      }
  
      @Test
      public void predicateThrows() {
  
          TestSubscriberEx<Object> ts = Flowable.error(new TestException("Outer"))
          .retry(new Predicate<Throwable>() {
              @Override
              public boolean test(Throwable e) throws Exception {
                  throw new TestException("Inner");
              }
          })
          .to(TestHelper.<Object>testConsumer())
          .assertFailure(CompositeException.class);
  
          List<Throwable> errors = TestHelper.compositeList(ts.errors().get(0));
  
          TestHelper.assertError(errors, 0, TestException.class, "Outer");
          TestHelper.assertError(errors, 1, TestException.class, "Inner");
      }
  
      @Test
      public void dontRetry() {
          Flowable.error(new TestException("Outer"))
          .retry(Functions.alwaysFalse())
          .to(TestHelper.<Object>testConsumer())
          .assertFailureAndMessage(TestException.class, "Outer");
      }
  
      @Test
      public void retryDisposeRace() {
          final TestException ex = new TestException();
          RxJavaPlugins.setErrorHandler(Functions.emptyConsumer());
          try {
              for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
                  final PublishProcessor<Integer> pp = PublishProcessor.create();
  
                  final TestSubscriber<Integer> ts = pp.retry(Functions.alwaysTrue()).test();
  
                  Runnable r1 = new Runnable() {
                      @Override
                      public void run() {
                          pp.onError(ex);
                      }
                  };
  
                  Runnable r2 = new Runnable() {
                      @Override
                      public void run() {
                          ts.cancel();
                      }
                  };
  
                  TestHelper.race(r1, r2);
  
                  ts.assertEmpty();
              }
          } finally {
              RxJavaPlugins.reset();
          }
      }
  
      @Test
      public void bipredicateThrows() {
  
          TestSubscriberEx<Object> ts = Flowable.error(new TestException("Outer"))
          .retry(new BiPredicate<Integer, Throwable>() {
              @Override
              public boolean test(Integer n, Throwable e) throws Exception {
                  throw new TestException("Inner");
              }
          })
          .to(TestHelper.<Object>testConsumer())
          .assertFailure(CompositeException.class);
  
          List<Throwable> errors = TestHelper.compositeList(ts.errors().get(0));
  
          TestHelper.assertError(errors, 0, TestException.class, "Outer");
          TestHelper.assertError(errors, 1, TestException.class, "Inner");
      }
  
      @Test
      public void retryBiPredicateDisposeRace() {
          RxJavaPlugins.setErrorHandler(Functions.emptyConsumer());
          try {
              for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
                  final PublishProcessor<Integer> pp = PublishProcessor.create();
  
                  final TestSubscriber<Integer> ts = pp.retry(new BiPredicate<Object, Object>() {
                      @Override
                      public boolean test(Object t1, Object t2) throws Exception {
                          return true;
                      }
                  }).test();
  
                  final TestException ex = new TestException();
  
                  Runnable r1 = new Runnable() {
                      @Override
                      public void run() {
                          pp.onError(ex);
                      }
                  };
  
                  Runnable r2 = new Runnable() {
                      @Override
                      public void run() {
                          ts.cancel();
                      }
                  };
  
                  TestHelper.race(r1, r2);
  
                  ts.assertEmpty();
              }
          } finally {
              RxJavaPlugins.reset();
          }
      }
  }
  