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.observable;
  
  import static org.junit.Assert.*;
  
  import java.util.*;
  import java.util.concurrent.TimeUnit;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.Observable;
  import io.reactivex.rxjava3.core.Observer;
  import io.reactivex.rxjava3.core.RxJavaTest;
  import io.reactivex.rxjava3.disposables.*;
  import io.reactivex.rxjava3.exceptions.TestException;
  import io.reactivex.rxjava3.functions.*;
  import io.reactivex.rxjava3.internal.functions.Functions;
  import io.reactivex.rxjava3.internal.observers.BlockingFirstObserver;
  import io.reactivex.rxjava3.observers.TestObserver;
  import io.reactivex.rxjava3.schedulers.Schedulers;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class ObservableBlockingTest extends RxJavaTest {
  
      @Test
      public void blockingFirst() {
          assertEquals(1, Observable.range(1, 10)
                  .subscribeOn(Schedulers.computation()).blockingFirst().intValue());
      }
  
      @Test
      public void blockingFirstDefault() {
          assertEquals(1, Observable.<Integer>empty()
                  .subscribeOn(Schedulers.computation()).blockingFirst(1).intValue());
      }
  
      @Test
      public void blockingSubscribeConsumer() {
          final List<Integer> list = new ArrayList<>();
  
          Observable.range(1, 5)
          .subscribeOn(Schedulers.computation())
          .blockingSubscribe(new Consumer<Integer>() {
              @Override
              public void accept(Integer v) throws Exception {
                  list.add(v);
              }
          });
  
          assertEquals(Arrays.asList(1, 2, 3, 4, 5), list);
      }
  
      @Test
      public void blockingSubscribeConsumerConsumer() {
          final List<Object> list = new ArrayList<>();
  
          Observable.range(1, 5)
          .subscribeOn(Schedulers.computation())
          .blockingSubscribe(new Consumer<Integer>() {
              @Override
              public void accept(Integer v) throws Exception {
                  list.add(v);
              }
          }, Functions.emptyConsumer());
  
          assertEquals(Arrays.asList(1, 2, 3, 4, 5), list);
      }
  
      @Test
      public void blockingSubscribeConsumerConsumerError() {
          final List<Object> list = new ArrayList<>();
  
          TestException ex = new TestException();
  
          Consumer<Object> cons = new Consumer<Object>() {
              @Override
              public void accept(Object v) throws Exception {
                  list.add(v);
              }
          };
  
          Observable.range(1, 5).concatWith(Observable.<Integer>error(ex))
          .subscribeOn(Schedulers.computation())
          .blockingSubscribe(cons, cons);
  
          assertEquals(Arrays.asList(1, 2, 3, 4, 5, ex), list);
      }
  
      @Test
      public void blockingSubscribeConsumerConsumerAction() {
          final List<Object> list = new ArrayList<>();
  
          Consumer<Object> cons = new Consumer<Object>() {
              @Override
              public void accept(Object v) throws Exception {
                  list.add(v);
              }
          };
  
          Observable.range(1, 5)
          .subscribeOn(Schedulers.computation())
          .blockingSubscribe(cons, cons, new Action() {
              @Override
              public void run() throws Exception {
                  list.add(100);
              }
          });
  
          assertEquals(Arrays.asList(1, 2, 3, 4, 5, 100), list);
      }
  
      @Test
      public void blockingSubscribeObserver() {
          final List<Object> list = new ArrayList<>();
  
          Observable.range(1, 5)
          .subscribeOn(Schedulers.computation())
          .blockingSubscribe(new Observer<Object>() {
  
              @Override
              public void onSubscribe(Disposable d) {
  
              }
  
              @Override
              public void onNext(Object value) {
                  list.add(value);
              }
  
              @Override
              public void onError(Throwable e) {
                  list.add(e);
              }
  
              @Override
              public void onComplete() {
                  list.add(100);
              }
  
          });
  
          assertEquals(Arrays.asList(1, 2, 3, 4, 5, 100), list);
      }
  
      @Test
      public void blockingSubscribeObserverError() {
          final List<Object> list = new ArrayList<>();
  
          final TestException ex = new TestException();
  
          Observable.range(1, 5).concatWith(Observable.<Integer>error(ex))
          .subscribeOn(Schedulers.computation())
          .blockingSubscribe(new Observer<Object>() {
  
              @Override
              public void onSubscribe(Disposable d) {
  
              }
  
              @Override
              public void onNext(Object value) {
                  list.add(value);
              }
  
              @Override
              public void onError(Throwable e) {
                  list.add(e);
              }
  
              @Override
              public void onComplete() {
                  list.add(100);
              }
  
          });
  
          assertEquals(Arrays.asList(1, 2, 3, 4, 5, ex), list);
      }
  
      @Test(expected = TestException.class)
      public void blockingForEachThrows() {
          Observable.just(1)
          .blockingForEach(new Consumer<Integer>() {
              @Override
              public void accept(Integer e) throws Exception {
                  throw new TestException();
              }
          });
      }
  
      @Test(expected = NoSuchElementException.class)
      public void blockingFirstEmpty() {
          Observable.empty().blockingFirst();
      }
  
      @Test(expected = NoSuchElementException.class)
      public void blockingLastEmpty() {
          Observable.empty().blockingLast();
      }
  
      @Test
      public void blockingFirstNormal() {
          assertEquals(1, Observable.just(1, 2).blockingFirst(3).intValue());
      }
  
      @Test
      public void blockingLastNormal() {
          assertEquals(2, Observable.just(1, 2).blockingLast(3).intValue());
      }
  
      @Test(expected = NoSuchElementException.class)
      public void blockingSingleEmpty() {
          Observable.empty().blockingSingle();
      }
  
      @Test
      public void utilityClass() {
          TestHelper.checkUtilityClass(ObservableBlockingSubscribe.class);
      }
  
      @Test
      public void disposeUpFront() {
          TestObserver<Object> to = new TestObserver<>();
          to.dispose();
          Observable.just(1).blockingSubscribe(to);
  
          to.assertEmpty();
      }
  
      @SuppressWarnings("rawtypes")
      @Test
      public void delayed() throws Exception {
          final TestObserver<Object> to = new TestObserver<>();
          final Observer[] s = { null };
  
          Schedulers.single().scheduleDirect(new Runnable() {
              @SuppressWarnings("unchecked")
              @Override
              public void run() {
                  to.dispose();
                  s[0].onNext(1);
              }
          }, 200, TimeUnit.MILLISECONDS);
  
          new Observable<Integer>() {
              @Override
              protected void subscribeActual(Observer<? super Integer> observer) {
                  observer.onSubscribe(Disposable.empty());
                  s[0] = observer;
              }
          }.blockingSubscribe(to);
  
          while (!to.isDisposed()) {
              Thread.sleep(100);
          }
  
          to.assertEmpty();
      }
  
      @Test
      public void interrupt() {
          TestObserver<Object> to = new TestObserver<>();
          Thread.currentThread().interrupt();
          Observable.never().blockingSubscribe(to);
      }
  
      @Test
      public void onCompleteDelayed() {
          TestObserver<Object> to = new TestObserver<>();
  
          Observable.empty().delay(100, TimeUnit.MILLISECONDS)
          .blockingSubscribe(to);
  
          to.assertResult();
      }
  
      @Test
      public void blockingCancelUpfront() {
          BlockingFirstObserver<Integer> o = new BlockingFirstObserver<>();
  
          assertFalse(o.isDisposed());
          o.dispose();
          assertTrue(o.isDisposed());
  
          Disposable d = Disposable.empty();
  
          o.onSubscribe(d);
  
          assertTrue(d.isDisposed());
  
          Thread.currentThread().interrupt();
          try {
              o.blockingGet();
              fail("Should have thrown");
          } catch (RuntimeException ex) {
              assertTrue(ex.toString(), ex.getCause() instanceof InterruptedException);
          }
  
          Thread.interrupted();
  
          o.onError(new TestException());
  
          try {
              o.blockingGet();
              fail("Should have thrown");
          } catch (TestException ex) {
              // expected
          }
      }
  }
  