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/*
* Copyright (c) 2000, 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 4162796 4162796
* @summary Test indexOf and lastIndexOf
* @key randomness
*/
import java.util.Random;
public class IndexOf {
static Random generator = new Random();
private static boolean failure = false;
public static void main(String[] args) throws Exception {
simpleTest();
compareIndexOfLastIndexOf();
compareStringStringBuffer();
if (failure)
throw new RuntimeException("One or more BitSet failures.");
}
private static void report(String testName, int failCount) {
System.err.println(testName+": " +
(failCount==0 ? "Passed":"Failed("+failCount+")"));
if (failCount > 0)
failure = true;
}
private static String generateTestString(int min, int max) {
StringBuffer aNewString = new StringBuffer(120);
int aNewLength = getRandomIndex(min, max);
for(int y=0; y<aNewLength; y++) {
int achar = generator.nextInt(30)+30;
char test = (char)(achar);
aNewString.append(test);
}
return aNewString.toString();
}
private static int getRandomIndex(int constraint1, int constraint2) {
int range = constraint2 - constraint1;
int x = generator.nextInt(range);
return constraint1 + x;
}
private static void simpleTest() {
int failCount = 0;
String sourceString;
StringBuffer sourceBuffer;
String targetString;
for (int i=0; i<10000; i++) {
do {
sourceString = generateTestString(99, 100);
sourceBuffer = new StringBuffer(sourceString);
targetString = generateTestString(10, 11);
} while (sourceString.indexOf(targetString) != -1);
int index1 = generator.nextInt(90) + 5;
sourceBuffer = sourceBuffer.replace(index1, index1, targetString);
if (sourceBuffer.indexOf(targetString) != index1)
failCount++;
if (sourceBuffer.indexOf(targetString, 5) != index1)
failCount++;
if (sourceBuffer.indexOf(targetString, 99) == index1)
failCount++;
}
report("Basic Test ", failCount);
}
// Note: it is possible although highly improbable that failCount will
// be > 0 even if everthing is working ok
private static void compareIndexOfLastIndexOf() {
int failCount = 0;
String sourceString;
StringBuffer sourceBuffer;
String targetString;
for (int i=0; i<10000; i++) {
do {
sourceString = generateTestString(99, 100);
sourceBuffer = new StringBuffer(sourceString);
targetString = generateTestString(10, 11);
} while (sourceString.indexOf(targetString) != -1);
int index1 = generator.nextInt(100);
sourceBuffer = sourceBuffer.replace(index1, index1, targetString);
// extremely remote possibility of > 1 match
int matches = 0;
int index2 = -1;
while((index2 = sourceBuffer.indexOf(targetString,index2+1)) != -1)
matches++;
if (matches > 1)
continue;
if (sourceBuffer.indexOf(targetString) !=
sourceBuffer.lastIndexOf(targetString))
failCount++;
sourceString = sourceBuffer.toString();
if (sourceString.indexOf(targetString) !=
sourceString.lastIndexOf(targetString))
failCount++;
}
report("IndexOf vs LastIndexOf ", failCount);
}
private static void compareStringStringBuffer() {
int failCount = 0;
for (int x=0; x<10000; x++) {
String testString = generateTestString(1, 100);
int len = testString.length();
StringBuffer testBuffer = new StringBuffer(len);
testBuffer.append(testString);
if (!testString.equals(testBuffer.toString()))
throw new RuntimeException("Initial equality failure");
int x1 = 0;
int x2 = 1000;
while(x2 > testString.length()) {
x1 = generator.nextInt(len);
x2 = generator.nextInt(100);
x2 = x1 + x2;
}
String fragment = testString.substring(x1,x2);
int sAnswer = testString.indexOf(fragment);
int sbAnswer = testBuffer.indexOf(fragment);
if (sAnswer != sbAnswer)
failCount++;
int testIndex = getRandomIndex(-100, 100);
sAnswer = testString.indexOf(fragment, testIndex);
sbAnswer = testBuffer.indexOf(fragment, testIndex);
if (sAnswer != sbAnswer)
failCount++;
sAnswer = testString.lastIndexOf(fragment);
sbAnswer = testBuffer.lastIndexOf(fragment);
if (sAnswer != sbAnswer)
failCount++;
testIndex = getRandomIndex(-100, 100);
sAnswer = testString.lastIndexOf(fragment, testIndex);
sbAnswer = testBuffer.lastIndexOf(fragment, testIndex);
if (sAnswer != sbAnswer)
failCount++;
}
report("String vs StringBuffer ", failCount);
}
}
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