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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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,

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 */

/*

 * @test

 * @bug 8193524

 * @summary Redefine a class' public static method that contains a lambda expression

 * @library /test/lib

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

 * @modules java.compiler

 *          java.instrument

 *          jdk.jartool/sun.tools.jar

 * @run main RedefineClassHelper

 * @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class*=trace RedefineSubtractLambdaExpression

 */

interface MathOperation {

    public int operation(int a, int b);

}

class B {

    public static int operate(int a, int b, MathOperation mathOperation) {

        return mathOperation.operation(a, b);

    }

    static int test_math(String p) {

        System.out.println(p + " from class B's test_math method");

        MathOperation subtraction = (int a, int b) -> a - b;

        MathOperation addition = (int a, int b) -> a + b;

        return operate(10, 5, addition);

    }

}

public class RedefineSubtractLambdaExpression {

    public static String newB =

        "class B {" +

        "    public static int operate(int a, int b, MathOperation mathOperation) {" +

        "        return mathOperation.operation(a, b);" +

        "    }" +

        "    static int test_math(String p) {" +

        "        MathOperation subtraction = (int a, int b) -> a - b;" +

        "        return operate(10, 5, subtraction);" +

        "    }" +

        "}";

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

        int res = B.test_math("Hello");

        System.out.println("Result = " + res);

        if (res != 15) {

            throw new Error("test_math returned " + res + " expected " + 15);

        }

        RedefineClassHelper.redefineClass(B.class, newB);

        res = B.test_math("Hello");

        if (res != 5)

            throw new Error("test_math returned " + res + " expected " + 5);

    }

}