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.*;
  
  import java.util.concurrent.*;
  
  import org.junit.Test;
  
  import io.reactivex.rxjava3.core.RxJavaTest;
  import io.reactivex.rxjava3.disposables.*;
  import io.reactivex.rxjava3.schedulers.Schedulers;
  import io.reactivex.rxjava3.testsupport.TestHelper;
  
  public class BlockingHelperTest extends RxJavaTest {
  
      @Test
      public void emptyEnum() {
          TestHelper.checkUtilityClass(BlockingHelper.class);
      }
  
      @Test
      public void interrupted() {
          CountDownLatch cdl = new CountDownLatch(1);
          Disposable d = Disposable.empty();
  
          Thread.currentThread().interrupt();
  
          try {
              BlockingHelper.awaitForComplete(cdl, d);
          } catch (IllegalStateException ex) {
              // expected
          }
          assertTrue(d.isDisposed());
          assertTrue(Thread.interrupted());
      }
  
      @Test
      public void unblock() {
          final CountDownLatch cdl = new CountDownLatch(1);
          Disposable d = Disposable.empty();
  
          Schedulers.computation().scheduleDirect(new Runnable() {
              @Override
              public void run() {
                  cdl.countDown();
              }
          }, 100, TimeUnit.MILLISECONDS);
  
          BlockingHelper.awaitForComplete(cdl, d);
  
          assertFalse(d.isDisposed());
      }
  }
  