1 /* 2 * Copyright (c) 2000, 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 /* @test 25 * @bug 4144267 26 * @summary Test StringBuffer.append(StringBuffer); 27 * @key randomness 28 */ 29 30 package test.java.lang.StringBuffer; 31 32 import java.util.Random; 33 import org.testng.annotations.Test; 34 35 public class AppendSB { 36 private static Random generator = new Random(); 37 38 // Android-changed: Add @Test annotation and remove empty arguments. 39 // public static void main(String[] args) throws Exception { 40 @Test main()41 public static void main() throws Exception { 42 for (int i=0; i<1000; i++) { 43 StringBuffer sb1 = generateTestBuffer(10, 100); 44 StringBuffer sb2 = generateTestBuffer(10, 100); 45 StringBuffer sb3 = generateTestBuffer(10, 100); 46 String s1 = sb1.toString(); 47 String s2 = sb2.toString(); 48 String s3 = sb3.toString(); 49 50 String concatResult = new String(s1+s2+s3); 51 52 StringBuffer test = new StringBuffer(); 53 test.append(sb1); 54 test.append(sb2); 55 test.append(sb3); 56 57 if (!test.toString().equals(concatResult)) 58 throw new RuntimeException("StringBuffer.append failure"); 59 } 60 } 61 getRandomIndex(int constraint1, int constraint2)62 private static int getRandomIndex(int constraint1, int constraint2) { 63 int range = constraint2 - constraint1; 64 int x = generator.nextInt(range); 65 return constraint1 + x; 66 } 67 generateTestBuffer(int min, int max)68 private static StringBuffer generateTestBuffer(int min, int max) { 69 StringBuffer aNewStringBuffer = new StringBuffer(120); 70 int aNewLength = getRandomIndex(min, max); 71 for(int y=0; y<aNewLength; y++) { 72 int achar = generator.nextInt(30)+30; 73 char test = (char)(achar); 74 aNewStringBuffer.append(test); 75 } 76 return aNewStringBuffer; 77 } 78 } 79