/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/**

 *  @test

 *  @summary Test stepping through lambdas

 *

 *  @author Staffan Larsen

 *

 *  @run build TestScaffold VMConnection TargetListener TargetAdapter

 *  @run compile -g LambdaStepTest.java

 */

import com.sun.jdi.LocalVariable;

import com.sun.jdi.ObjectReference;

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;

import com.sun.jdi.event.StepEvent;

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

interface DefaultTest {

    default void defaultMethod() {

        String from = "default";

        System.out.println("Hello from " + from);

    }

}

class LambdaStepTestTarg implements DefaultTest {

    private void test() {

        String from = "test";

        System.out.println("Hello from " + from);

    }

    private static void instanceTest() {

        LambdaStepTestTarg l = new LambdaStepTestTarg();

        l.test();

    }

    private static void lambdaTest() {

        Runnable r = () -> {

            String from = "lambda";

            System.out.println("Hello from " + from);

        };

        r.run();

    }

    private static void defaultTest() {

        LambdaStepTestTarg l = new LambdaStepTestTarg();

        l.defaultMethod();

    }

    public static void main(String[] args) {

        instanceTest();

        lambdaTest();

        defaultTest();

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

    }

}

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

public class LambdaStepTest extends TestScaffold {

    LambdaStepTest (String args[]) {

        super(args);

    }

    public static void main(String[] args)

        throws Exception

    {

        new LambdaStepTest (args).startTests();

    }

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

    protected void runTests()

        throws Exception

    {

        // ## Normal instance method

        BreakpointEvent bpe = startTo("LambdaStepTestTarg", "instanceTest", "()V");

        ThreadReference thread = bpe.thread();

        // step over allocation

        StepEvent se = stepOverLine(thread);

        System.out.println(se.thread().frame(0));

        // step into test();

        se = stepIntoLine(thread);

        System.out.println(se.thread().frame(0));

        // step over variable initialization

        se = stepOverLine(thread);

        System.out.println(se.thread().frame(0));

        // get value of variable "from"

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

        LocalVariable lv = frame.visibleVariableByName("from");

        System.out.println(lv);

        StringReference sr = (StringReference) frame.getValue(lv);

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

            throw new Exception("Unexpected variable value in instanceTest: "+sr.value());

        }

        // ## Lambda method

        bpe = resumeTo("LambdaStepTestTarg", "lambdaTest", "()V");

        thread = bpe.thread();

        // step over allocation

        se = stepOverLine(thread);

        System.out.println(se.thread().frame(0));

        // step into run() of the lambda

        se = stepIntoLine(thread);

        System.out.println(se.thread().frame(0));

        // step over variable initialization

        se = stepOverLine(thread);

        System.out.println(se.thread().frame(0));

        // get value of variable "from"

        frame = se.thread().frame(0);

        lv = frame.visibleVariableByName("from");

        System.out.println(lv);

        sr = (StringReference) frame.getValue(lv);

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

            throw new Exception("Unexpected variable value in lambdaTest: "+sr.value());

        }

        // ## Default method

        bpe = resumeTo("LambdaStepTestTarg", "defaultTest", "()V");

        thread = bpe.thread();

        // step over allocation

        se = stepOverLine(thread);

        System.out.println(se.thread().frame(0));

        // step into defaultMethod()

        se = stepIntoLine(thread);

        System.out.println(se.thread().frame(0));

        // step over variable initialization

        se = stepOverLine(thread);

        System.out.println(se.thread().frame(0));

        // get value of variable "from"

        frame = se.thread().frame(0);

        lv = frame.visibleVariableByName("from");

        System.out.println(lv);

        sr = (StringReference) frame.getValue(lv);

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

            throw new Exception("Unexpected variable value in lambdaTest: "+sr.value());

        }

        /*

         * resume the target listening for events

         */

        listenUntilVMDisconnect();

    }

}