1 /*
2  * Copyright (c) 2010, 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 6955504 6992121
27  * @summary Test the StringBuilder.ensureCapacity() with negative minimumCapacity
28  *    and append() method with negative length input argument.
29  *    Also, test the StringBuffer class.
30  */
31 
32 package test.java.lang.StringBuilder;
33 
34 import java.util.ArrayList;
35 import java.util.Vector;
36 import org.testng.annotations.Test;
37 
38 public class EnsureCapacity {
39     // Android-changed: Add @Test annotation and remove empty arguments.
40     // public static void main(String[] args) {
41     @Test
main()42     public static void main() {
43         testStringBuilder();
44         testStringBuffer();
45     }
46 
checkCapacity(int before, int after)47     private static void checkCapacity(int before, int after) {
48         if (before != after) {
49             throw new RuntimeException("capacity is expected to be unchanged: " +
50                 "before=" + before + " after=" + after);
51         }
52     }
53 
testStringBuilder()54     private static void testStringBuilder() {
55         StringBuilder sb = new StringBuilder("abc");
56         int cap = sb.capacity();
57 
58         // test if negative minimumCapacity
59         sb.ensureCapacity(Integer.MIN_VALUE);
60         checkCapacity(cap, sb.capacity());
61 
62         try {
63             char[] str = {'a', 'b', 'c', 'd'};
64             // test if negative length
65             sb.append(str, 0, Integer.MIN_VALUE + 10);
66             throw new RuntimeException("IndexOutOfBoundsException not thrown");
67         } catch (IndexOutOfBoundsException ex) {
68         }
69     }
70 
testStringBuffer()71     private static void testStringBuffer() {
72         StringBuffer sb = new StringBuffer("abc");
73         int cap = sb.capacity();
74 
75         // test if negative minimumCapacity
76         sb.ensureCapacity(Integer.MIN_VALUE);
77         checkCapacity(cap, sb.capacity());
78 
79         try {
80             char[] str = {'a', 'b', 'c', 'd'};
81             // test if negative length
82             sb.append(str, 0, Integer.MIN_VALUE + 10);
83             throw new RuntimeException("IndexOutOfBoundsException not thrown");
84         } catch (IndexOutOfBoundsException ex) {
85         }
86     }
87 }
88