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

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 *

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 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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/*

 * @test

 * @bug 8003280

 * @summary Add lambda tests

 *  basic test for capture of non-mutable locals

 * @author  Brian Goetz

 * @author  Maurizio Cimadamore

 * @run main LambdaCapture01

 */

public class LambdaCapture01 {

    static int assertionCount = 0;

    static void assertTrue(boolean cond) {

        assertionCount++;

        if (!cond)

            throw new AssertionError();

    }

    interface Tester {

        void test();

    }

    interface TU<T, U> {

        public T foo(U u);

    }

    public static <T, U> T exec(TU<T, U> lambda, U x) {

        return lambda.foo(x);

    }

    public int n = 5;

    //Simple local capture

    void test1() {

        final int N = 1;

        int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N, 3);

        assertTrue(4 == res);

    }

    //Local capture with multiple scopes (anon class)

    void test2() {

        final int N = 1;

        new Tester() {

            public void test() {

                final int M = 2;

                int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3);

                assertTrue(6 == res);

            }

        }.test();

    }

    //Local capture with multiple scopes (local class)

    void test3() {

        final int N = 1;

        class MyTester implements Tester {

            public void test() {

                final int M = 2;

                int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3);

                assertTrue(6 == res);

            }

        }

        new MyTester().test();

    }

    //access to field from enclosing scope

    void test4() {

        final int N = 4;

        int res1 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + n + N, 3);

        assertTrue(12 == res1);

        int res2 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + LambdaCapture01.this.n + N, 3);

        assertTrue(12 == res2);

    }

    public static void main(String[] args) {

        LambdaCapture01 t = new LambdaCapture01();

        t.test1();

        t.test2();

        t.test3();

        t.test4();

        assertTrue(assertionCount == 5);

    }

}