265 lines
9.6 KiB
Java
265 lines
9.6 KiB
Java
/*
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* Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 4812591 4705328 5019111 8218228
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* @summary Test append and insert methods with CharSequence params
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* @key randomness
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*/
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import java.util.Random;
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public class AppendCharSequence {
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private static Random generator = new Random();
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public static void main(String[] args) throws Exception {
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bash();
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checkNulls();
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checkOffsets();
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checkConstructor();
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}
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// Sanity test of contents
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private static void bash() throws Exception {
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for (int i=0; i<1000; i++) {
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StringBuffer sb1 = generateTestBuffer(0, 100);
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StringBuffer sb2 = generateTestBuffer(0, 100);
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StringBuffer sb3 = generateTestBuffer(0, 100);
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StringBuffer sb4 = generateTestBuffer(0, 100);
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StringBuffer sb5 = new StringBuffer();
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String s1 = sb1.toString();
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String s2 = sb2.toString();
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String s3 = sb3.toString();
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String s4 = sb4.toString();
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String s5 = null;
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// append(CharSequence cs)
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sb5.append((CharSequence)sb1);
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s5 = sb1.toString();
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if (!sb5.toString().equals(s5))
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throw new RuntimeException("StringBuffer.append failure 1");
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// append (CharSequence cs, int start, int end)
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int index = generator.nextInt(100);
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int len = generator.nextInt(100);
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while (index > sb2.length() - len) {
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index = generator.nextInt(100);
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len = generator.nextInt(100);
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}
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sb5.append((CharSequence)sb2, index, index + len);
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s5 = s5 + sb2.toString().substring(index, index + len);
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if (!sb5.toString().equals(s5))
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throw new RuntimeException("StringBuffer.append failure 2");
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// insert(int dstOffset, CharSequence cs)
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index = generator.nextInt(100);
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while (index > s5.length()) {
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index = generator.nextInt(100);
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}
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sb5.insert(index, (CharSequence)sb3);
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s5 = new StringBuffer(s5).insert(index, sb3).toString();
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if (!sb5.toString().equals(s5))
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throw new RuntimeException("StringBuffer.insert failure 1");
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// insert(int dstOffset, CharSequence s, int start, int end)
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int index1 = generator.nextInt(100);
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while (index1 > s5.length()) {
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index1 = generator.nextInt(100);
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}
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int index2 = generator.nextInt(100);
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len = generator.nextInt(100);
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while (index2 > sb4.length() - len) {
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index2 = generator.nextInt(100);
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len = generator.nextInt(100);
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}
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sb5.insert(index1, (CharSequence)sb4, index2, index2 + len);
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s5 = new StringBuffer(s5).insert(index1, s4.toCharArray(),
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index2, len).toString();
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if (!sb5.toString().equals(s5))
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throw new RuntimeException("StringBuffer.insert failure 2");
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}
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}
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private static int getRandomIndex(int constraint1, int constraint2) {
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int range = constraint2 - constraint1;
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int x = generator.nextInt(range);
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return constraint1 + x;
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}
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private static StringBuffer generateTestBuffer(int min, int max) {
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StringBuffer aNewStringBuffer = new StringBuffer();
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int aNewLength = getRandomIndex(min, max);
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for(int y=0; y<aNewLength; y++) {
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int achar = generator.nextInt(30)+30;
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char test = (char)(achar);
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aNewStringBuffer.append(test);
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}
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return aNewStringBuffer;
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}
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// Check handling of null as "null"
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private static void checkNulls() throws Exception {
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StringBuffer sb1 = new StringBuffer();
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CharSequence cs = null;
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sb1.append("test");
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sb1.append(cs);
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if (!sb1.toString().equals("testnull"))
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throw new RuntimeException("StringBuffer.append failure 3");
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sb1 = new StringBuffer();
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sb1.append("test", 0, 2);
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sb1.append(cs, 0, 2);
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if (!sb1.toString().equals("tenu"))
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throw new RuntimeException("StringBuffer.append failure 4");
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sb1 = new StringBuffer("test");
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sb1.insert(2, cs);
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if (!sb1.toString().equals("tenullst"))
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throw new RuntimeException("StringBuffer.insert failure 3");
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sb1 = new StringBuffer("test");
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sb1.insert(2, cs, 0, 2);
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if (!sb1.toString().equals("tenust"))
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throw new RuntimeException("StringBuffer.insert failure 4");
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}
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// Test the bounds checking
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private static void checkOffsets() throws Exception {
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// append (CharSeqeunce cs, int start, int end)
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for (int i=0; i<100; i++) {
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StringBuffer sb = generateTestBuffer(0, 80);
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CharSequence cs = (CharSequence)generateTestBuffer(0, 80);
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int index = 0;
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int len = 0;
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while (index <= cs.length() - len) {
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index = generator.nextInt(100) - 50;
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len = generator.nextInt(100) - 50;
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if (index < 0)
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break;
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if (len < 0)
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break;
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}
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try {
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sb.append(cs, index, index + len);
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throw new RuntimeException("Append bounds checking failure");
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} catch (IndexOutOfBoundsException e) {
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// Correct result
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}
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}
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// insert(int dstOffset, CharSequence cs)
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for (int i=0; i<100; i++) {
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StringBuffer sb = new StringBuffer("test1");
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CharSequence cs = (CharSequence)new StringBuffer("test2");
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int index = 0;
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while (index <= sb.length()) {
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index = generator.nextInt(100) - 50;
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if (index < 0)
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break;
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}
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try {
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sb.insert(index, cs);
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throw new RuntimeException("Insert bounds checking failure");
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} catch (IndexOutOfBoundsException e) {
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// Correct result
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}
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}
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// insert(int dstOffset, CharSequence s, int start, int end)
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for (int i=0; i<100; i++) {
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StringBuffer sb = new StringBuffer("test1");
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CharSequence cs = (CharSequence)new StringBuffer("test2");
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int index1 = 0;
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while (index1 <= sb.length()) {
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index1 = generator.nextInt(100) - 50;
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if (index1 < 0)
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break;
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}
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int index2 = 0;
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int len = 0;
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while (index2 < sb.length() - len) {
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index2 = generator.nextInt(100) - 50;
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len = generator.nextInt(100) - 50;
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if (index2 < 0)
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break;
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if (len < 0)
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break;
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}
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try {
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sb.insert(index1, cs, index2, index2 + len);
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throw new RuntimeException("Insert bounds checking failure");
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} catch (IndexOutOfBoundsException e) {
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// Correct result
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}
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}
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}
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// Test the CharSequence constructor
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private static void checkConstructor() throws Exception {
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for (int i=0; i<100; i++) {
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StringBuffer sb = generateTestBuffer(0, 100);
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CharSequence cs = (CharSequence)sb;
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StringBuffer sb2 = new StringBuffer(cs);
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if (!sb.toString().equals(sb2.toString())) {
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throw new RuntimeException("CharSequence constructor failure");
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}
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}
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checkNegativeLenCharSeq(-1);
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checkNegativeLenCharSeq(-16);
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checkNegativeLenCharSeq(-17);
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checkNegativeLenCharSeq(Integer.MIN_VALUE);
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}
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// Test constructing from CharSequence of negative length
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private static void checkNegativeLenCharSeq(int len) {
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try {
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CharSequence seq = new MyNegativeLenCharSeq(len);
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StringBuffer sb = new StringBuffer(seq);
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} catch (NegativeArraySizeException expected) {
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} catch (Throwable exc) {
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throw new RuntimeException("Unexpected: " + exc, exc);
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}
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}
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private static class MyNegativeLenCharSeq implements CharSequence {
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int length;
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MyNegativeLenCharSeq(int length) {
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this.length = length;
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}
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public char charAt(int i) {
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throw new UnsupportedOperationException();
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}
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public int length() { return length; }
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public CharSequence subSequence(int st, int e) {
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throw new UnsupportedOperationException();
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}
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public String toString() { return ""; }
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}
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}
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