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.ArrayList;
33 import java.util.Arrays;
34 import java.util.Collection;
35 import java.util.Collections;
36 import java.util.HashSet;
37 import java.util.LinkedHashSet;
38 import java.util.LinkedList;
39 import java.util.List;
40 import java.util.Random;
41 
42 public class AddAll {
43     static final int N = 100;
main(String[] args)44     public static void main(String[] args) {
45         test(new ArrayList<Integer>());
46         test(new LinkedList<Integer>());
47         test(new HashSet<Integer>());
48         test(new LinkedHashSet<Integer>());
49     }
50 
51     private static Random rnd = new Random();
52 
test(Collection<Integer> c)53     static void test(Collection<Integer> c) {
54         int x = 0;
55         for (int i = 0; i < N; i++) {
56             int rangeLen = rnd.nextInt(10);
57             if (Collections.addAll(c, range(x, x + rangeLen)) !=
58                 (rangeLen != 0))
59                 throw new RuntimeException("" + rangeLen);
60             x += rangeLen;
61         }
62         if (c instanceof List) {
63             if (!c.equals(Arrays.asList(range(0, x))))
64                 throw new RuntimeException(x +": "+c);
65         } else {
66             if (!c.equals(new HashSet<Integer>(Arrays.asList(range(0, x)))))
67                 throw new RuntimeException(x +": "+c);
68         }
69     }
70 
range(int from, int to)71     private static Integer[] range(int from, int to) {
72         Integer[] result = new Integer[to - from];
73         for (int i = from, j=0; i < to; i++, j++)
74             result[j] = new Integer(i);
75         return result;
76     }
77 }
78