/*

 * Copyright (c) 2016, 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.io.File;

import java.io.FileReader;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.nio.file.Path;

import java.util.Properties;

import java.util.spi.ToolProvider;

import tests.Helper;

import tests.JImageGenerator;

/*

 * @test

 * @bug 8168925

 * @summary MODULES property should be topologically ordered and space-separated list

 * @library ../lib

 * @build tests.*

 * @run main ModuleNamesOrderTest

 */

public class ModuleNamesOrderTest {

    static final ToolProvider JLINK_TOOL = ToolProvider.findFirst("jlink")

        .orElseThrow(() ->

            new RuntimeException("jlink tool not found")

        );

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

        Helper helper = Helper.newHelper();

        if (helper == null) {

            System.err.println("Test not run");

            return;

        }

        Path outputDir = helper.createNewImageDir("image8168925");

        JImageGenerator.getJLinkTask()

                .modulePath(helper.defaultModulePath())

                .output(outputDir)

                .addMods("jdk.scripting.nashorn")

                .call().assertSuccess();

        File release = new File(outputDir.toString(), "release");

        if (!release.exists()) {

            throw new AssertionError("release not generated");

        }

        Properties props = new Properties();

        try (FileReader reader = new FileReader(release)) {

            props.load(reader);

        }

        String modules = props.getProperty("MODULES");

        if (!modules.startsWith("\"java.base ")) {

            throw new AssertionError("MODULES should start with 'java.base'");

        }

        if (!modules.endsWith(" jdk.scripting.nashorn\"")) {

            throw new AssertionError("MODULES end with 'jdk.scripting.nashorn'");

        }

        checkDependency(modules, "java.logging", "java.base");

        checkDependency(modules, "jdk.dynalink", "java.logging");

        checkDependency(modules, "java.scripting", "java.base");

        checkDependency(modules, "jdk.scripting.nashorn", "java.logging");

        checkDependency(modules, "jdk.scripting.nashorn", "jdk.dynalink");

        checkDependency(modules, "jdk.scripting.nashorn", "java.scripting");

    }

    private static void checkDependency(String modules, String fromMod, String toMod) {

        int fromModIdx = modules.indexOf(fromMod);

        if (fromModIdx == -1) {

            throw new AssertionError(fromMod + " is missing in MODULES");

        }

        int toModIdx = modules.indexOf(toMod);

        if (toModIdx == -1) {

            throw new AssertionError(toMod + " is missing in MODULES");

        }

        if (toModIdx > fromModIdx) {

            throw new AssertionError("in MODULES, " + fromMod + " should appear after " + toMod);

        }

    }

}