1 /*
   2  * Copyright (c) 2016, 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 8149330
  27  * @summary Capacity should not get close to Integer.MAX_VALUE unless
  28  *          necessary
  29  * @run main/othervm -Xmx5G HugeCapacity
  30  * @ignore This test has huge memory requirements
  31  */
  32 
  33 public class HugeCapacity {
  34     private static int failures = 0;
  35 
  36     public static void main(String[] args) {
  37         testLatin1();
  38         testUtf16();
  39         if (failures > 0) {
  40             throw new RuntimeException(failures + " tests failed");
  41         }
  42     }
  43 
  44     private static void testLatin1() {
  45         try {
  46             StringBuilder sb = new StringBuilder();
  47             sb.ensureCapacity(Integer.MAX_VALUE / 2);
  48             sb.ensureCapacity(Integer.MAX_VALUE / 2 + 1);
  49         } catch (OutOfMemoryError oom) {
  50             oom.printStackTrace();
  51             failures++;
  52         }
  53     }
  54 
  55     private static void testUtf16() {
  56         try {
  57             StringBuilder sb = new StringBuilder();
  58             sb.append('\u042b');
  59             sb.ensureCapacity(Integer.MAX_VALUE / 4);
  60             sb.ensureCapacity(Integer.MAX_VALUE / 4 + 1);
  61         } catch (OutOfMemoryError oom) {
  62             oom.printStackTrace();
  63             failures++;
  64         }
  65     }
  66 }