/*

 * Copyright (c) 2013, 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

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 * questions.

 */

/**

 *  @test

 *  @bug 8021897

 *  @summary Test getting the value for an uninitialized String object

 *

 *  @author Staffan Larsen

 *

 *  @run build TestScaffold VMConnection TargetListener TargetAdapter

 *  @run compile -g GetUninitializedStringValue.java

 *  @run driver GetUninitializedStringValue

 */

import com.sun.jdi.ReferenceType;

import com.sun.jdi.StackFrame;

import com.sun.jdi.StringReference;

import com.sun.jdi.ThreadReference;

import com.sun.jdi.event.BreakpointEvent;

 /********** target program **********/

class GetUninitializedStringValueTarg {

    public static void main(String[] args) {

        new String("foo");

        System.out.println("Goodbye from GetUninitializedStringValueTarg!");

    }

}

 /********** test program **********/

public class GetUninitializedStringValue extends TestScaffold {

    ReferenceType targetClass;

    ThreadReference mainThread;

    GetUninitializedStringValue (String args[]) {

        super(args);

    }

    public static void main(String[] args)

        throws Exception

    {

        new GetUninitializedStringValue (args).startTests();

    }

    /********** test core **********/

    protected void runTests()

        throws Exception

    {

        /*

         * Run to String.<init>

         */

        startUp("GetUninitializedStringValueTarg");

        BreakpointEvent bpe = resumeTo("java.lang.String", "<init>", "(Ljava/lang/String;)V");

        /*

         * We've arrived. Look at 'this' - it will be uninitialized (the value field will not be set yet).

         */

        StackFrame frame = bpe.thread().frame(0);

        StringReference sr = (StringReference)frame.thisObject();

        if (!sr.value().equals("")) {

            throw new Exception("Unexpected value for the uninitialized String");

        }

        /*

         * resume the target listening for events

         */

        listenUntilVMDisconnect();

    }

}