1 /*
   2  * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug     4822887
  27  * @summary Basic test for Collections.addAll
  28  * @author  Josh Bloch
  29  */
  30 
  31 import java.util.*;
  32 
  33 public class AddAll {
  34     final static int N = 100;
  35     public static void main(String args[]) {
  36         test(new ArrayList<Integer>());
  37         test(new LinkedList<Integer>());
  38         test(new HashSet<Integer>());
  39         test(new LinkedHashSet<Integer>());
  40     }
  41 
  42     private static Random rnd = new Random();
  43 
  44     static void test(Collection<Integer> c) {
  45         int x = 0;
  46         for (int i = 0; i < N; i++) {
  47             int rangeLen = rnd.nextInt(10);
  48             if (Collections.addAll(c, range(x, x + rangeLen)) !=
  49                 (rangeLen != 0))
  50                 throw new RuntimeException("" + rangeLen);
  51             x += rangeLen;
  52         }
  53         if (c instanceof List) {
  54             if (!c.equals(Arrays.asList(range(0, x))))
  55                 throw new RuntimeException(x +": "+c);
  56         } else {
  57             if (!c.equals(new HashSet<Integer>(Arrays.asList(range(0, x)))))
  58                 throw new RuntimeException(x +": "+c);
  59         }
  60     }
  61 
  62     private static Integer[] range(int from, int to) {
  63         Integer[] result = new Integer[to - from];
  64         for (int i = from, j=0; i < to; i++, j++)
  65             result[j] = new Integer(i);
  66         return result;
  67     }
  68 }