/*
    * Copyright (C) 2009 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 junit.framework.TestCase;
  
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  /**
   * Test cases for {@link SettableFuture}.
   *
   * @author Sven Mawson
   */
  public class SettableFutureTest extends TestCase {
  
    private SettableFuture<String> future;
    private ListenableFutureTester tester;
  
    @Override
    protected void setUp() throws Exception {
      super.setUp();
  
      future = SettableFuture.create();
      tester = new ListenableFutureTester(future);
      tester.setUp();
    }
  
    public void testDefaultState() throws Exception {
      try {
        future.get(5, TimeUnit.MILLISECONDS);
        fail();
      } catch (TimeoutException expected) {}
    }
  
    public void testSetValue() throws Exception {
      assertTrue(future.set("value"));
      tester.testCompletedFuture("value");
    }
  
    public void testSetFailure() throws Exception {
      assertTrue(future.setException(new Exception("failure")));
      tester.testFailedFuture("failure");
    }
  
    public void testSetFailureNull() throws Exception {
      try {
        future.setException(null);
        fail();
      } catch (NullPointerException expected) {
      }
      assertFalse(future.isDone());
      assertTrue(future.setException(new Exception("failure")));
      tester.testFailedFuture("failure");
    }
  
    public void testCancel() throws Exception {
      assertTrue(future.cancel(true));
      tester.testCancelledFuture();
    }
  }