/*
* Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4812591 4705328 5019111
* @summary Test append and insert methods with CharSequence params
* @key randomness
*/
import java.util.Random;
public class AppendCharSequence {
private static Random generator = new Random();
public static void main(String[] args) throws Exception {
bash();
checkNulls();
checkOffsets();
checkConstructor();
}
// Sanity test of contents
private static void bash() throws Exception {
for (int i=0; i<1000; i++) {
StringBuffer sb1 = generateTestBuffer(0, 100);
StringBuffer sb2 = generateTestBuffer(0, 100);
StringBuffer sb3 = generateTestBuffer(0, 100);
StringBuffer sb4 = generateTestBuffer(0, 100);
StringBuffer sb5 = new StringBuffer();
String s1 = sb1.toString();
String s2 = sb2.toString();
String s3 = sb3.toString();
String s4 = sb4.toString();
String s5 = null;
// append(CharSequence cs)
sb5.append((CharSequence)sb1);
s5 = sb1.toString();
if (!sb5.toString().equals(s5))
throw new RuntimeException("StringBuffer.append failure 1");
// append (CharSequence cs, int start, int end)
int index = generator.nextInt(100);
int len = generator.nextInt(100);
while (index > sb2.length() - len) {
index = generator.nextInt(100);
len = generator.nextInt(100);
}
sb5.append((CharSequence)sb2, index, index + len);
s5 = s5 + sb2.toString().substring(index, index + len);
if (!sb5.toString().equals(s5))
throw new RuntimeException("StringBuffer.append failure 2");
// insert(int dstOffset, CharSequence cs)
index = generator.nextInt(100);
while (index > s5.length()) {
index = generator.nextInt(100);
}
sb5.insert(index, (CharSequence)sb3);
s5 = new StringBuffer(s5).insert(index, sb3).toString();
if (!sb5.toString().equals(s5))
throw new RuntimeException("StringBuffer.insert failure 1");
// insert(int dstOffset, CharSequence s, int start, int end)
int index1 = generator.nextInt(100);
while (index1 > s5.length()) {
index1 = generator.nextInt(100);
}
int index2 = generator.nextInt(100);
len = generator.nextInt(100);
while (index2 > sb4.length() - len) {
index2 = generator.nextInt(100);
len = generator.nextInt(100);
}
sb5.insert(index1, (CharSequence)sb4, index2, index2 + len);
s5 = new StringBuffer(s5).insert(index1, s4.toCharArray(),
index2, len).toString();
if (!sb5.toString().equals(s5))
throw new RuntimeException("StringBuffer.insert failure 2");
}
}
private static int getRandomIndex(int constraint1, int constraint2) {
int range = constraint2 - constraint1;
int x = generator.nextInt(range);
return constraint1 + x;
}
private static StringBuffer generateTestBuffer(int min, int max) {
StringBuffer aNewStringBuffer = new StringBuffer();
int aNewLength = getRandomIndex(min, max);
for(int y=0; y<aNewLength; y++) {
int achar = generator.nextInt(30)+30;
char test = (char)(achar);
aNewStringBuffer.append(test);
}
return aNewStringBuffer;
}
// Check handling of null as "null"
private static void checkNulls() throws Exception {
StringBuffer sb1 = new StringBuffer();
CharSequence cs = null;
sb1.append("test");
sb1.append(cs);
if (!sb1.toString().equals("testnull"))
throw new RuntimeException("StringBuffer.append failure 3");
sb1 = new StringBuffer();
sb1.append("test", 0, 2);
sb1.append(cs, 0, 2);
if (!sb1.toString().equals("tenu"))
throw new RuntimeException("StringBuffer.append failure 4");
sb1 = new StringBuffer("test");
sb1.insert(2, cs);
if (!sb1.toString().equals("tenullst"))
throw new RuntimeException("StringBuffer.insert failure 3");
sb1 = new StringBuffer("test");
sb1.insert(2, cs, 0, 2);
if (!sb1.toString().equals("tenust"))
throw new RuntimeException("StringBuffer.insert failure 4");
}
// Test the bounds checking
private static void checkOffsets() throws Exception {
// append (CharSeqeunce cs, int start, int end)
for (int i=0; i<100; i++) {
StringBuffer sb = generateTestBuffer(0, 80);
CharSequence cs = (CharSequence)generateTestBuffer(0, 80);
int index = 0;
int len = 0;
while (index <= cs.length() - len) {
index = generator.nextInt(100) - 50;
len = generator.nextInt(100) - 50;
if (index < 0)
break;
if (len < 0)
break;
}
try {
sb.append(cs, index, index + len);
throw new RuntimeException("Append bounds checking failure");
} catch (IndexOutOfBoundsException e) {
// Correct result
}
}
// insert(int dstOffset, CharSequence cs)
for (int i=0; i<100; i++) {
StringBuffer sb = new StringBuffer("test1");
CharSequence cs = (CharSequence)new StringBuffer("test2");
int index = 0;
while (index <= sb.length()) {
index = generator.nextInt(100) - 50;
if (index < 0)
break;
}
try {
sb.insert(index, cs);
throw new RuntimeException("Insert bounds checking failure");
} catch (IndexOutOfBoundsException e) {
// Correct result
}
}
// insert(int dstOffset, CharSequence s, int start, int end)
for (int i=0; i<100; i++) {
StringBuffer sb = new StringBuffer("test1");
CharSequence cs = (CharSequence)new StringBuffer("test2");
int index1 = 0;
while (index1 <= sb.length()) {
index1 = generator.nextInt(100) - 50;
if (index1 < 0)
break;
}
int index2 = 0;
int len = 0;
while (index2 < sb.length() - len) {
index2 = generator.nextInt(100) - 50;
len = generator.nextInt(100) - 50;
if (index2 < 0)
break;
if (len < 0)
break;
}
try {
sb.insert(index1, cs, index2, index2 + len);
throw new RuntimeException("Insert bounds checking failure");
} catch (IndexOutOfBoundsException e) {
// Correct result
}
}
}
// Test the CharSequence constructor
private static void checkConstructor() throws Exception {
for (int i=0; i<100; i++) {
StringBuffer sb = generateTestBuffer(0, 100);
CharSequence cs = (CharSequence)sb;
StringBuffer sb2 = new StringBuffer(cs);
if (!sb.toString().equals(sb2.toString())) {
throw new RuntimeException("CharSequence constructor failure");
}
}
}
}