123 lines
4.9 KiB
Java
123 lines
4.9 KiB
Java
/*
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* Copyright (c) 2000, 2004, 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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/*
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* @test
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* @bug 4242309 4982981
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* @summary Test equals and contentEquals in String
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* @key randomness
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*/
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import java.util.Random;
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import java.nio.CharBuffer;
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// Yes, I used cut and paste for this test. Yes more code
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// sharing could have been accomplished.
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public class ContentEquals {
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private static Random rnd = new Random();
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private static final int ITERATIONS = 1000;
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private static final int STR_LEN = 20;
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public static void main(String[] args) throws Exception {
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testStringBuffer();
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testStringBuilder();
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testString();
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testCharSequence();
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}
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// Test a StringBuffer, which uses the old method from 1.4
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public static void testStringBuffer() throws Exception {
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for (int i=0; i<ITERATIONS; i++) {
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int length = rnd.nextInt(STR_LEN) + 1;
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StringBuffer testStringBuffer = new StringBuffer();
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for(int x=0; x<length; x++) {
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char aChar = (char)rnd.nextInt();
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testStringBuffer.append(aChar);
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}
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String testString = testStringBuffer.toString();
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char c = testStringBuffer.charAt(0);
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testStringBuffer.setCharAt(0, 'c');
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testStringBuffer.setCharAt(0, c);
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if (!testString.contentEquals(testStringBuffer))
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throw new RuntimeException("ContentsEqual failure");
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}
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}
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// Test StringBuilder as a CharSequence using new method in 1.5
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public static void testStringBuilder() throws Exception {
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for (int i=0; i<ITERATIONS; i++) {
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int length = rnd.nextInt(STR_LEN) + 1;
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StringBuilder testStringBuilder = new StringBuilder();
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for(int x=0; x<length; x++) {
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char aChar = (char)rnd.nextInt();
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testStringBuilder.append(aChar);
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}
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String testString = testStringBuilder.toString();
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char c = testStringBuilder.charAt(0);
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testStringBuilder.setCharAt(0, 'c');
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testStringBuilder.setCharAt(0, c);
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if (!testString.contentEquals(testStringBuilder))
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throw new RuntimeException("ContentsEqual failure");
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}
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}
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// Test a String as a CharSequence. This takes a different codepath in
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// the new method in 1.5
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public static void testString() throws Exception {
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for (int i=0; i<ITERATIONS; i++) {
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int length = rnd.nextInt(STR_LEN) + 1;
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StringBuilder testStringBuilder = new StringBuilder();
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for(int x=0; x<length; x++) {
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char aChar = (char)rnd.nextInt();
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testStringBuilder.append(aChar);
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}
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String testString = testStringBuilder.toString();
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char c = testStringBuilder.charAt(0);
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testStringBuilder.setCharAt(0, 'c');
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testStringBuilder.setCharAt(0, c);
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if (!testString.contentEquals(testStringBuilder.toString()))
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throw new RuntimeException("ContentsEqual failure");
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}
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}
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// Test a CharSequence that is not an AbstractStringBuilder,
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// this takes a different codepath in the new method in 1.5
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public static void testCharSequence() throws Exception {
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for (int i=0; i<ITERATIONS; i++) {
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int length = rnd.nextInt(STR_LEN) + 1;
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StringBuilder testStringBuilder = new StringBuilder();
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for(int x=0; x<length; x++) {
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char aChar = (char)rnd.nextInt();
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testStringBuilder.append(aChar);
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}
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String testString = testStringBuilder.toString();
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char c = testStringBuilder.charAt(0);
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testStringBuilder.setCharAt(0, 'c');
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testStringBuilder.setCharAt(0, c);
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CharBuffer buf = CharBuffer.wrap(testStringBuilder.toString());
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if (!testString.contentEquals(buf))
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throw new RuntimeException("ContentsEqual failure");
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}
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}
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}
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