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  * @key randomness
  30  */
  31 
  32 import java.util.*;
  33 
  34 public class AddAll {
  35     final static int N = 100;
  36     public static void main(String args[]) {
  37         test(new ArrayList<Integer>());
  38         test(new LinkedList<Integer>());
  39         test(new HashSet<Integer>());
  40         test(new LinkedHashSet<Integer>());
  41     }
  42 
  43     private static Random rnd = new Random();
  44 
  45     static void test(Collection<Integer> c) {
  46         int x = 0;
  47         for (int i = 0; i < N; i++) {
  48             int rangeLen = rnd.nextInt(10);
  49             if (Collections.addAll(c, range(x, x + rangeLen)) !=
  50                 (rangeLen != 0))
  51                 throw new RuntimeException("" + rangeLen);
  52             x += rangeLen;
  53         }
  54         if (c instanceof List) {
  55             if (!c.equals(Arrays.asList(range(0, x))))
  56                 throw new RuntimeException(x +": "+c);
  57         } else {
  58             if (!c.equals(new HashSet<Integer>(Arrays.asList(range(0, x)))))
  59                 throw new RuntimeException(x +": "+c);
  60         }
  61     }
  62 
  63     private static Integer[] range(int from, int to) {
  64         Integer[] result = new Integer[to - from];
  65         for (int i = from, j=0; i < to; i++, j++)
  66             result[j] = new Integer(i);
  67         return result;
  68     }
  69 }