/*

 * 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.

 *

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 */

/*

 * @test

 * @bug 8056900

 * @summary Verifies message returned with NoClassDefFoundError exception.

 * @library /test/lib

 * @modules java.base/jdk.internal.misc

 *          java.compiler

 * @run main/native NoClassDefFoundMsg

 */

import jdk.test.lib.compiler.InMemoryJavaCompiler;

import jdk.internal.misc.Unsafe;

public class NoClassDefFoundMsg {

    static native void callDefineClass(String className);

    static native void callFindClass(String className);

    static {

        System.loadLibrary("NoClassDefFoundMsg");

    }

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

        Unsafe unsafe = Unsafe.getUnsafe();

        byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");

        // Create a class name of length 65536.

        StringBuilder tooBigClassName = new StringBuilder("z");

        for (int x = 0; x < 16; x++) {

            tooBigClassName = tooBigClassName.append(tooBigClassName);

        }

        // Test JVM_DefineClass() with long name.

        try {

            unsafe.defineClass(tooBigClassName.toString(), klassbuf, 4, klassbuf.length - 4, null, null);

            throw new RuntimeException("defineClass did not throw expected NoClassDefFoundError");

        } catch (NoClassDefFoundError e) {

            if (!e.getMessage().contains("Class name exceeds maximum length of ")) {

                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());

            }

        }

        // Test JNI_DefineClass() with long name.

        try {

            callDefineClass(tooBigClassName.toString());

            throw new RuntimeException("DefineClass did not throw expected NoClassDefFoundError");

        } catch (NoClassDefFoundError e) {

            if (!e.getMessage().contains("Class name exceeds maximum length of ")) {

                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());

            }

        }

        // Test JNI_FindClass() with long name.

        try {

            callFindClass(tooBigClassName.toString());

            throw new RuntimeException("DefineClass did not throw expected NoClassDefFoundError");

        } catch (NoClassDefFoundError e) {

            if (!e.getMessage().contains("Class name exceeds maximum length of ")) {

                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());

            }

        }

        // Test JNI_FindClass() with null name.

        try {

            callFindClass(null);

            throw new RuntimeException("FindClass did not throw expected NoClassDefFoundError");

        } catch (NoClassDefFoundError e) {

            if (!e.getMessage().contains("No class name given")) {

                throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());

            }

        }

    }

}