/*
    * Copyright (C) 2011 The Guava Authors
    *
    * 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 com.google.common.util.concurrent;
  
  import com.google.common.collect.ImmutableList;
  
  import junit.framework.TestCase;
  
  import java.util.List;
  import java.util.concurrent.Callable;
  import java.util.concurrent.TimeUnit;
  
  /**
   * Tests for {@link AbstractListeningExecutorService}.
   *
   * @author Colin Decker
   */
  public class AbstractListeningExecutorServiceTest extends TestCase {
  
    public void testSubmit() throws Exception {
      /*
       * Mostly just tests that ListenableFutureTasks are created and run; tests for
       * ListenableFutureTask should ensure that listeners are called correctly.
       */
  
      TestListeningExecutorService e = new TestListeningExecutorService();
  
      TestRunnable runnable = new TestRunnable();
      ListenableFuture<?> runnableFuture = e.submit(runnable);
      assertTrue(runnableFuture instanceof ListenableFutureTask);
      assertTrue(runnableFuture.isDone());
      assertTrue(runnable.run);
  
      ListenableFuture<String> callableFuture = e.submit(new TestCallable());
      assertTrue(callableFuture instanceof ListenableFutureTask);
      assertTrue(callableFuture.isDone());
      assertEquals("foo", callableFuture.get());
  
      TestRunnable runnable2 = new TestRunnable();
      ListenableFuture<Integer> runnableFuture2 = e.submit(runnable2, 3);
      assertTrue(runnableFuture2 instanceof ListenableFutureTask);
      assertTrue(runnableFuture2.isDone());
      assertTrue(runnable2.run);
      assertEquals((Integer) 3, runnableFuture2.get());
    }
  
    private static class TestRunnable implements Runnable {
      boolean run = false;
  
      @Override
      public void run() {
        run = true;
      }
    }
  
    private static class TestCallable implements Callable<String> {
      @Override
      public String call() {
        return "foo";
      }
    }
  
    /**
     * Simple same thread listening executor service that doesn't handle shutdown.
     */
    private static class TestListeningExecutorService extends AbstractListeningExecutorService {
  
      @Override
      public void execute(Runnable runnable) {
        assertTrue(runnable instanceof ListenableFutureTask);
        runnable.run();
      }
  
      @Override
      public void shutdown() {
      }
  
      @Override
      public List<Runnable> shutdownNow() {
        return ImmutableList.of();
      }
  
      @Override
      public boolean isShutdown() {
        return false;
     }
 
     @Override
     public boolean isTerminated() {
       return false;
     }
 
     @Override
     public boolean awaitTermination(long timeout, TimeUnit unit) {
       return false;
     }
   }
 }