/*

 * Copyright (c) 2005, 2019, 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.

 */

import java.util.Arrays;

import java.nio.charset.Charset;

import java.nio.charset.StandardCharsets;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.JDKToolLauncher;

/*

 * @test

 * @summary Unit test for jstack utility

 * @library /test/lib

 * @run main BasicJStackTest

 */

public class BasicJStackTest {

    private static ProcessBuilder processBuilder = new ProcessBuilder();

    public static void main(String[] args) throws Exception {

        testJstackNoArgs();

        testJstack_l();

        testJstackUTF8Encoding();

    }

    private static void testJstackNoArgs() throws Exception {

        String marker = "testJstackNoArgs";

        OutputAnalyzer output = jstack(marker);

        output.shouldHaveExitValue(0);

        output.shouldContain(marker);

    }

    private static void testJstack_l() throws Exception {

        String marker = "testJstack_l";

        OutputAnalyzer output = jstack(marker, "-l");

        output.shouldHaveExitValue(0);

        output.shouldContain(marker);

    }

    private static void testJstackUTF8Encoding() throws Exception {

        String marker = "markerName" + "\u00e4\u0bb5".repeat(60);

        OutputAnalyzer output = jstack(marker);

        output.shouldHaveExitValue(0);

        output.shouldContain(marker);

    }

    private static OutputAnalyzer jstack(String marker, String... toolArgs) throws Exception {

        Charset cs = StandardCharsets.UTF_8;

        Thread.currentThread().setName(marker);

        JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jstack");

        launcher.addVMArg("-XX:+UsePerfData");

        launcher.addVMArg("-Dfile.encoding=" + cs);

        if (toolArgs != null) {

            for (String toolArg : toolArgs) {

                launcher.addToolArg(toolArg);

            }

        }

        launcher.addToolArg(Long.toString(ProcessTools.getProcessId()));

        processBuilder.command(launcher.getCommand());

        System.out.println(Arrays.toString(processBuilder.command().toArray()).replace(",", ""));

        OutputAnalyzer output = ProcessTools.executeProcess(processBuilder, null, cs);

        System.out.println(output.getOutput());

        return output;

    }

}