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.util;
  
  import static org.junit.Assert.assertTrue;
  
  import java.io.IOException;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.disposables.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.observers.TestObserver;
  import io.reactivex.rxjava3.testsupport.*;
  
  public class HalfSerializerObserverTest extends RxJavaTest {
  
      @Test
      @SuppressWarnings({ "rawtypes", "unchecked" })
      public void reentrantOnNextOnNext() {
          final AtomicInteger wip = new AtomicInteger();
          final AtomicThrowable error = new AtomicThrowable();
  
          final Observer[] a = { null };
  
          final TestObserver to = new TestObserver();
  
          Observer observer = new Observer() {
              @Override
              public void onSubscribe(Disposable d) {
                  to.onSubscribe(d);
              }
  
              @Override
              public void onNext(Object t) {
                  if (t.equals(1)) {
                      HalfSerializer.onNext(a[0], 2, wip, error);
                  }
                  to.onNext(t);
              }
  
              @Override
              public void onError(Throwable t) {
                  to.onError(t);
              }
  
              @Override
              public void onComplete() {
                  to.onComplete();
              }
          };
  
          a[0] = observer;
  
          observer.onSubscribe(Disposable.empty());
  
          HalfSerializer.onNext(observer, 1, wip, error);
  
          to.assertValue(1).assertNoErrors().assertNotComplete();
      }
  
      @Test
      @SuppressWarnings({ "rawtypes", "unchecked" })
      public void reentrantOnNextOnError() {
          final AtomicInteger wip = new AtomicInteger();
          final AtomicThrowable error = new AtomicThrowable();
  
          final Observer[] a = { null };
  
          final TestObserver to = new TestObserver();
  
          Observer observer = new Observer() {
              @Override
              public void onSubscribe(Disposable d) {
                  to.onSubscribe(d);
              }
  
              @Override
              public void onNext(Object t) {
                  if (t.equals(1)) {
                      HalfSerializer.onError(a[0], new TestException(), wip, error);
                  }
                  to.onNext(t);
              }
  
              @Override
              public void onError(Throwable t) {
                  to.onError(t);
              }
  
              @Override
              public void onComplete() {
                  to.onComplete();
              }
          };
  
          a[0] = observer;
  
          observer.onSubscribe(Disposable.empty());
  
          HalfSerializer.onNext(observer, 1, wip, error);
  
          to.assertFailure(TestException.class, 1);
      }
  
      @Test
      @SuppressWarnings({ "rawtypes", "unchecked" })
      public void reentrantOnNextOnComplete() {
          final AtomicInteger wip = new AtomicInteger();
          final AtomicThrowable error = new AtomicThrowable();
  
          final Observer[] a = { null };
  
          final TestObserver to = new TestObserver();
  
          Observer observer = new Observer() {
              @Override
              public void onSubscribe(Disposable d) {
                  to.onSubscribe(d);
              }
  
              @Override
              public void onNext(Object t) {
                  if (t.equals(1)) {
                      HalfSerializer.onComplete(a[0], wip, error);
                  }
                  to.onNext(t);
              }
  
              @Override
              public void onError(Throwable t) {
                  to.onError(t);
              }
  
              @Override
              public void onComplete() {
                  to.onComplete();
              }
          };
  
          a[0] = observer;
  
          observer.onSubscribe(Disposable.empty());
  
          HalfSerializer.onNext(observer, 1, wip, error);
  
          to.assertResult(1);
      }
  
      @Test
      @SuppressUndeliverable
      @SuppressWarnings({ "rawtypes", "unchecked" })
      public void reentrantErrorOnError() {
          final AtomicInteger wip = new AtomicInteger();
          final AtomicThrowable error = new AtomicThrowable();
  
          final Observer[] a = { null };
  
          final TestObserver to = new TestObserver();
  
          Observer observer = new Observer() {
              @Override
              public void onSubscribe(Disposable d) {
                  to.onSubscribe(d);
              }
  
              @Override
              public void onNext(Object t) {
                  to.onNext(t);
              }
  
              @Override
              public void onError(Throwable t) {
                  to.onError(t);
                  HalfSerializer.onError(a[0], new IOException(), wip, error);
              }
  
              @Override
              public void onComplete() {
                  to.onComplete();
              }
          };
  
          a[0] = observer;
  
          observer.onSubscribe(Disposable.empty());
  
          HalfSerializer.onError(observer, new TestException(), wip, error);
  
          to.assertFailure(TestException.class);
      }
  
      @Test
      public void onNextOnCompleteRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
  
              final AtomicInteger wip = new AtomicInteger();
              final AtomicThrowable error = new AtomicThrowable();
  
              final TestObserver<Integer> to = new TestObserver<>();
              to.onSubscribe(Disposable.empty());
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      HalfSerializer.onNext(to, 1, wip, error);
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      HalfSerializer.onComplete(to, wip, error);
                  }
              };
  
              TestHelper.race(r1, r2);
  
              to.assertComplete().assertNoErrors();
  
              assertTrue(to.values().size() <= 1);
          }
      }
  
      @Test
      @SuppressUndeliverable
      public void onErrorOnCompleteRace() {
          for (int i = 0; i < TestHelper.RACE_DEFAULT_LOOPS; i++) {
  
              final AtomicInteger wip = new AtomicInteger();
              final AtomicThrowable error = new AtomicThrowable();
  
              final TestObserverEx<Integer> to = new TestObserverEx<>();
  
              to.onSubscribe(Disposable.empty());
  
              final TestException ex = new TestException();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      HalfSerializer.onError(to, ex, wip, error);
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      HalfSerializer.onComplete(to, wip, error);
                  }
              };
  
              TestHelper.race(r1, r2);
  
              if (to.completions() != 0) {
                  to.assertResult();
              } else {
                  to.assertFailure(TestException.class);
              }
          }
      }
  
  }
  