86 lines
3.0 KiB
Java
86 lines
3.0 KiB
Java
/*
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* Copyright (c) 2007, 2020, 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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* @key stress randomness
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*
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* @summary converted from VM Testbase gc/gctests/StringIntern.
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* VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
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*
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* @library /vmTestbase
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* /test/lib
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* @run main/othervm gc.gctests.StringIntern.StringIntern
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*/
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package gc.gctests.StringIntern;
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import nsk.share.test.*;
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import nsk.share.gc.*;
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/**
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* Test that strings returned by String.intern() can be collected.
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*
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* Create strings consisting of random characters, call String.intern().
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* Check that intern() contract.
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*/
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public class StringIntern extends ThreadedGCTest {
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private int maxLength = 1000;
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private int checkCount = 100;
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private class StringGenerator implements Runnable {
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private StringBuffer sb = new StringBuffer();
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private void generateRandomBuffer() {
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int length = LocalRandom.nextInt(maxLength);
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for (int i = 0; i < length; ++i)
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sb.append((char) LocalRandom.nextInt(Integer.MAX_VALUE));
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}
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private String getString() {
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return sb.toString();
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}
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public void run() {
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generateRandomBuffer();
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for (int i = 0; i < checkCount; ++i) {
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String s1 = getString();
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String s2 = getString();
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if (s1.intern() != s2.intern()) {
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log.error("Test failed on: " + s1);
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setFailed(true);
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}
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}
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}
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}
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protected Runnable createRunnable(int i) {
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return new StringGenerator();
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}
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public static void main(String[] args) {
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GC.runTest(new StringIntern(), args);
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}
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}
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