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.jdk8;
  
  import static org.junit.Assert.assertFalse;
  
  import java.io.IOException;
  import java.util.*;
  import java.util.function.*;
  import java.util.stream.*;
  
  import org.junit.Test;
  import org.reactivestreams.Subscriber;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.internal.subscriptions.BooleanSubscription;
  import io.reactivex.rxjava3.processors.*;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class FlowableCollectWithCollectorTest extends RxJavaTest {
  
      @Test
      public void basic() {
          Flowable.range(1, 5)
          .collect(Collectors.toList())
          .test()
          .assertResult(Arrays.asList(1, 2, 3, 4, 5));
      }
  
      @Test
      public void empty() {
          Flowable.empty()
          .collect(Collectors.toList())
          .test()
          .assertResult(Collections.emptyList());
      }
  
      @Test
      public void error() {
          Flowable.error(new TestException())
          .collect(Collectors.toList())
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void collectorSupplierCrash() {
          Flowable.range(1, 5)
          .collect(new Collector<Integer, Integer, Integer>() {
  
              @Override
              public Supplier<Integer> supplier() {
                  throw new TestException();
              }
  
              @Override
              public BiConsumer<Integer, Integer> accumulator() {
                  return (a, b) -> { };
              }
  
              @Override
              public BinaryOperator<Integer> combiner() {
                  return (a, b) -> a + b;
              }
  
              @Override
              public Function<Integer, Integer> finisher() {
                  return a -> a;
              }
  
              @Override
              public Set<Characteristics> characteristics() {
                  return Collections.emptySet();
              }
          })
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void collectorAccumulatorCrash() {
          BehaviorProcessor<Integer> source = BehaviorProcessor.createDefault(1);
  
          source
          .collect(new Collector<Integer, Integer, Integer>() {
  
              @Override
              public Supplier<Integer> supplier() {
                  return () -> 1;
              }
  
              @Override
              public BiConsumer<Integer, Integer> accumulator() {
                  return (a, b) -> { throw new TestException(); };
              }
  
              @Override
              public BinaryOperator<Integer> combiner() {
                  return (a, b) -> a + b;
              }
  
              @Override
              public Function<Integer, Integer> finisher() {
                  return a -> a;
              }
  
              @Override
              public Set<Characteristics> characteristics() {
                  return Collections.emptySet();
              }
          })
          .test()
          .assertFailure(TestException.class);
  
          assertFalse(source.hasSubscribers());
      }
  
      @Test
      public void collectorFinisherCrash() {
          Flowable.range(1, 5)
          .collect(new Collector<Integer, Integer, Integer>() {
  
              @Override
              public Supplier<Integer> supplier() {
                  return () -> 1;
              }
  
              @Override
              public BiConsumer<Integer, Integer> accumulator() {
                  return (a, b) -> {  };
              }
  
              @Override
              public BinaryOperator<Integer> combiner() {
                  return (a, b) -> a + b;
              }
  
              @Override
              public Function<Integer, Integer> finisher() {
                  return a -> { throw new TestException(); };
              }
  
              @Override
              public Set<Characteristics> characteristics() {
                  return Collections.emptySet();
              }
          })
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void collectorAccumulatorDropSignals() throws Throwable {
          TestHelper.withErrorTracking(errors -> {
              Flowable<Integer> source = new Flowable<Integer>() {
                  @Override
                  protected void subscribeActual(Subscriber<? super Integer> s) {
                      s.onSubscribe(new BooleanSubscription());
                      s.onNext(1);
                      s.onNext(2);
                      s.onError(new IOException());
                      s.onComplete();
                  }
              };
  
              source
              .collect(new Collector<Integer, Integer, Integer>() {
  
                  @Override
                  public Supplier<Integer> supplier() {
                      return () -> 1;
                  }
  
                  @Override
                  public BiConsumer<Integer, Integer> accumulator() {
                      return (a, b) -> { throw new TestException(); };
                  }
  
                  @Override
                  public BinaryOperator<Integer> combiner() {
                      return (a, b) -> a + b;
                  }
  
                  @Override
                  public Function<Integer, Integer> finisher() {
                      return a -> a;
                  }
  
                  @Override
                  public Set<Characteristics> characteristics() {
                      return Collections.emptySet();
                  }
              })
              .test()
              .assertFailure(TestException.class);
  
              TestHelper.assertUndeliverable(errors, 0, IOException.class);
          });
      }
  
      @Test
      public void dispose() {
          TestHelper.checkDisposed(PublishProcessor.create()
                  .collect(Collectors.toList()));
      }
  
      @Test
      public void onSubscribe() {
          TestHelper.checkDoubleOnSubscribeFlowableToSingle(f -> f.collect(Collectors.toList()));
      }
  
      @Test
      public void basicToFlowable() {
          Flowable.range(1, 5)
          .collect(Collectors.toList())
          .toFlowable()
          .test()
          .assertResult(Arrays.asList(1, 2, 3, 4, 5));
      }
  
      @Test
      public void emptyToFlowable() {
          Flowable.empty()
          .collect(Collectors.toList())
          .toFlowable()
          .test()
          .assertResult(Collections.emptyList());
      }
  
      @Test
      public void errorToFlowable() {
          Flowable.error(new TestException())
          .collect(Collectors.toList())
          .toFlowable()
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void collectorSupplierCrashToFlowable() {
          Flowable.range(1, 5)
          .collect(new Collector<Integer, Integer, Integer>() {
  
              @Override
              public Supplier<Integer> supplier() {
                  throw new TestException();
              }
  
              @Override
              public BiConsumer<Integer, Integer> accumulator() {
                  return (a, b) -> { };
              }
  
              @Override
              public BinaryOperator<Integer> combiner() {
                  return (a, b) -> a + b;
              }
  
              @Override
              public Function<Integer, Integer> finisher() {
                  return a -> a;
              }
  
              @Override
              public Set<Characteristics> characteristics() {
                  return Collections.emptySet();
              }
          })
          .toFlowable()
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void collectorAccumulatorCrashToFlowable() {
          BehaviorProcessor<Integer> source = BehaviorProcessor.createDefault(1);
  
          source
          .collect(new Collector<Integer, Integer, Integer>() {
  
              @Override
              public Supplier<Integer> supplier() {
                  return () -> 1;
              }
  
              @Override
              public BiConsumer<Integer, Integer> accumulator() {
                  return (a, b) -> { throw new TestException(); };
              }
  
              @Override
              public BinaryOperator<Integer> combiner() {
                  return (a, b) -> a + b;
              }
  
              @Override
              public Function<Integer, Integer> finisher() {
                  return a -> a;
              }
  
              @Override
              public Set<Characteristics> characteristics() {
                  return Collections.emptySet();
              }
          })
          .toFlowable()
          .test()
          .assertFailure(TestException.class);
  
          assertFalse(source.hasSubscribers());
      }
  
      @Test
      public void collectorFinisherCrashToFlowable() {
          Flowable.range(1, 5)
          .collect(new Collector<Integer, Integer, Integer>() {
  
              @Override
              public Supplier<Integer> supplier() {
                  return () -> 1;
              }
  
              @Override
              public BiConsumer<Integer, Integer> accumulator() {
                  return (a, b) -> {  };
              }
  
              @Override
              public BinaryOperator<Integer> combiner() {
                  return (a, b) -> a + b;
              }
  
              @Override
              public Function<Integer, Integer> finisher() {
                  return a -> { throw new TestException(); };
              }
  
              @Override
              public Set<Characteristics> characteristics() {
                  return Collections.emptySet();
              }
          })
          .toFlowable()
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void collectorAccumulatorDropSignalsToFlowable() throws Throwable {
          TestHelper.withErrorTracking(errors -> {
              Flowable<Integer> source = new Flowable<Integer>() {
                  @Override
                  protected void subscribeActual(Subscriber<? super Integer> s) {
                      s.onSubscribe(new BooleanSubscription());
                      s.onNext(1);
                      s.onNext(2);
                      s.onError(new IOException());
                      s.onComplete();
                  }
              };
  
              source
              .collect(new Collector<Integer, Integer, Integer>() {
  
                  @Override
                  public Supplier<Integer> supplier() {
                      return () -> 1;
                  }
  
                  @Override
                  public BiConsumer<Integer, Integer> accumulator() {
                      return (a, b) -> { throw new TestException(); };
                  }
  
                  @Override
                  public BinaryOperator<Integer> combiner() {
                      return (a, b) -> a + b;
                  }
  
                  @Override
                  public Function<Integer, Integer> finisher() {
                      return a -> a;
                  }
  
                  @Override
                  public Set<Characteristics> characteristics() {
                      return Collections.emptySet();
                  }
              })
              .toFlowable()
              .test()
              .assertFailure(TestException.class);
  
              TestHelper.assertUndeliverable(errors, 0, IOException.class);
          });
      }
  
      @Test
      public void disposeToFlowable() {
          TestHelper.checkDisposed(PublishProcessor.create()
                  .collect(Collectors.toList()).toFlowable());
      }
  
      @Test
      public void onSubscribeToFlowable() {
          TestHelper.checkDoubleOnSubscribeFlowable(f -> f.collect(Collectors.toList()).toFlowable());
      }
  }
  