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.subscribers;
  
  import static org.junit.Assert.*;
  
  import java.util.ArrayDeque;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import org.junit.Test;
  import org.reactivestreams.Subscription;
  
  import io.reactivex.rxjava3.core.RxJavaTest;
  import io.reactivex.rxjava3.internal.subscriptions.BooleanSubscription;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class BlockingSubscriberTest extends RxJavaTest {
  
      @Test
      public void doubleOnSubscribe() {
          TestHelper.doubleOnSubscribe(new BlockingSubscriber<Integer>(new ArrayDeque<>()));
      }
  
      @Test
      public void cancel() {
          BlockingSubscriber<Integer> bq = new BlockingSubscriber<>(new ArrayDeque<>());
  
          assertFalse(bq.isCancelled());
  
          bq.cancel();
  
          assertTrue(bq.isCancelled());
  
          bq.cancel();
  
          assertTrue(bq.isCancelled());
      }
  
      @Test
      public void blockingFirstDoubleOnSubscribe() {
          TestHelper.doubleOnSubscribe(new BlockingFirstSubscriber<Integer>());
      }
  
      @Test
      public void blockingFirstTimeout() {
          BlockingFirstSubscriber<Integer> bf = new BlockingFirstSubscriber<>();
  
          Thread.currentThread().interrupt();
  
          try {
              bf.blockingGet();
              fail("Should have thrown!");
          } catch (RuntimeException ex) {
              assertTrue(ex.toString(), ex.getCause() instanceof InterruptedException);
          }
      }
  
      @Test
      public void blockingFirstTimeout2() {
          BlockingFirstSubscriber<Integer> bf = new BlockingFirstSubscriber<>();
  
          bf.onSubscribe(new BooleanSubscription());
  
          Thread.currentThread().interrupt();
  
          try {
              bf.blockingGet();
              fail("Should have thrown!");
          } catch (RuntimeException ex) {
              assertTrue(ex.toString(), ex.getCause() instanceof InterruptedException);
          }
      }
  
      @Test
      public void cancelOnRequest() {
  
          final BlockingFirstSubscriber<Integer> bf = new BlockingFirstSubscriber<>();
  
          final AtomicBoolean b = new AtomicBoolean();
  
          Subscription s = new Subscription() {
              @Override
              public void request(long n) {
                  bf.cancelled = true;
              }
  
              @Override
              public void cancel() {
                  b.set(true);
              }
          };
  
          bf.onSubscribe(s);
  
          assertTrue(b.get());
      }
  
      @Test
      public void cancelUpfront() {
  
          final BlockingFirstSubscriber<Integer> bf = new BlockingFirstSubscriber<>();
  
          final AtomicBoolean b = new AtomicBoolean();
  
          bf.cancelled = true;
  
          Subscription s = new Subscription() {
              @Override
              public void request(long n) {
                  b.set(true);
              }
  
              @Override
              public void cancel() {
              }
          };
  
          bf.onSubscribe(s);
  
          assertFalse(b.get());
      }
  }
  