/*

 * Copyright (c) 2017, 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 8174694

 * @summary improve error message shown when main class can't be loaded

 * @compile MainClassCantBeLoadedTest.java

 * @run main MainClassCantBeLoadedTest

 */

import java.io.*;

import java.util.*;

public class MainClassCantBeLoadedTest extends TestHelper {

    private MainClassCantBeLoadedTest(){}

    @Test

    void testLoadingClassWithMissingSuper() throws Exception {

        if (!isEnglishLocale()) {

            return;

        }

        File cwd = new File(".");

        File srcDir = new File(cwd, "src");

        if (srcDir.exists()) {

            recursiveDelete(srcDir);

        }

        srcDir.mkdirs();

        /* we want to generate two classes A and B, where B is the superclass of A

         * class A has a main method

         */

        ArrayList<String> scratchpad = new ArrayList<>();

        scratchpad.add("public class A extends B {");

        scratchpad.add("    public static void main(String... args) {}");

        scratchpad.add("}");

        createFile(new File(srcDir, "A.java"), scratchpad);

        scratchpad.clear();

        scratchpad.add("class B {}");

        createFile(new File(srcDir, "B.java"), scratchpad);

        // let's compile both

        TestResult trCompilation = doExec(javacCmd,

                "-d", "out",

                new File(srcDir, "A.java").toString(),

                new File(srcDir, "B.java").toString());

        if (!trCompilation.isOK()) {

            System.err.println(trCompilation);

            throw new RuntimeException("Error: compiling");

        }

        // and now B is removed

        File outDir = new File(cwd, "out");

        File bClass = new File(outDir, "B.class");

        bClass.delete();

        // if A is executed

        TestResult trExecution = doExec(javaCmd, "-cp", "out", "A");

        // then this error message should be generated

        trExecution.contains("Error: Could not find or load main class A");

        trExecution.contains("Caused by: java.lang.NoClassDefFoundError: B");

        if (!trExecution.testStatus)

            System.err.println(trExecution);

    }

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

        MainClassCantBeLoadedTest a = new MainClassCantBeLoadedTest();

        a.run(args);

        if (testExitValue > 0) {

            System.out.println("Total of " + testExitValue + " failed");

            throw new RuntimeException("Test failed");

        } else {

            System.out.println("Test passed");

        }

    }

}