TestGenerator.java

/*
 * Copyright (c) 2017, 2018, 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.
 */

package applications.jcstress;

import jdk.test.lib.Utils;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Calendar;
import java.util.EnumSet;
import java.util.function.Predicate;


/**
 * @notest THIS IS NOT A TEST.
 * This is a test generator, should be run only when jcstress is changed
 *
 * @library /test/lib /
 * @run main applications.jcstress.TestGenerator
 */

/**
 * Use jcstress test suite to generate jtreg tests in 'test.src' or current
 * directory. Used version is defined in JcstressRunner class.
 *
 * This generator depends on testlibrary, therefore it should be compiled and
 * added to classpath. One can replace @notest by @test in jtreg test
 * description above to run this class with jtreg.
 *
 * @see <a href=https://wiki.openjdk.java.net/display/CodeTools/jcstress>jcstress</a>
 */
public class TestGenerator {
    private static final String COPYRIGHT;
    static {
        String years;
        final int firstYear = 2017;
        int currentYear = Calendar.getInstance().get(Calendar.YEAR);
        if (firstYear < currentYear) {
            years = String.format("%d, %d", firstYear, currentYear);
        } else {
            years = "" + firstYear;
        }
        COPYRIGHT = String.format("/*\n" +
                " * Copyright (c) %s, Oracle and/or its affiliates. All rights reserved.\n" +
                " * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.\n" +
                " *\n" +
                " * This code is free software; you can redistribute it and/or modify it\n" +
                " * under the terms of the GNU General Public License version 2 only, as\n" +
                " * published by the Free Software Foundation.\n" +
                " *\n" +
                " * This code is distributed in the hope that it will be useful, but WITHOUT\n" +
                " * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or\n" +
                " * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License\n" +
                " * version 2 for more details (a copy is included in the LICENSE file that\n" +
                " * accompanied this code).\n" +
                " *\n" +
                " * You should have received a copy of the GNU General Public License version\n" +
                " * 2 along with this work; if not, write to the Free Software Foundation,\n" +
                " * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.\n" +
                " *\n" +
                " * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA\n" +
                " * or visit www.oracle.com if you need additional information or have any\n" +
                " * questions.\n" +
                " */\n\n", years);
    }

    public static String DESC_FORMAT = "\n"
            + "/**\n"
            + " * @test %1$s\n"
            + " * @library /test/lib /\n"
            + " * @run driver/timeout=21600 " + JcstressRunner.class.getName()
                    // verbose output
                    + " -v"
                    // test name
                    + " -t org.openjdk.jcstress.tests.%1$s\\.\n"
            + " */\n";

    public static void main(String[] args) throws IOException {
        Path path = JcstressRunner.pathToArtifact();
        Path output;
        try {
            output = Files.createTempFile("jcstress", ".out");
            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                    "-jar",
                    path.toAbsolutePath().toString(),
                    "-l");
            pb.redirectOutput(output.toFile());
            new OutputAnalyzer(pb.start()).shouldHaveExitValue(0);
        } catch (Exception e) {
            throw new Error("Can not get list of tests", e);
        }

        BufferedReader reader = Files.newBufferedReader(output);

        reader.lines()
                .skip(4) // skip first 4 lines: name, -{80}, revision and empty line
                .map(s -> s.split("\\.")[4]) // group by the package name following "org.openjdk.jcstress.tests."
                .distinct()
                .filter(s -> !s.startsWith("sample")) // skip sample test
                .forEach(TestGenerator::generate);

        output.toFile().delete();
    }

    private static void generate(String group) {
        Path testFile = Paths.get(Utils.TEST_SRC).resolve(group + ".java");

        System.out.println("Generating " + testFile);
        try (PrintStream ps = new PrintStream(testFile.toFile())) {
            ps.print(COPYRIGHT);
            ps.printf("/* DO NOT MODIFY THIS FILE. GENERATED BY %s */\n",
                    TestGenerator.class.getName());

            ps.printf(DESC_FORMAT, group);
            ps.print('\n');
        } catch (FileNotFoundException e) {
            System.out.println("Failed to generate tests for " + group);
        }
    }
}