aoqi@0: /*
aoqi@0:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 8003280
aoqi@0:  * @summary Add lambda tests
aoqi@0:  *  basic test for capture of non-mutable locals
aoqi@0:  * @author  Brian Goetz
aoqi@0:  * @author  Maurizio Cimadamore
aoqi@0:  * @run main LambdaCapture01
aoqi@0:  */
aoqi@0: 
aoqi@0: public class LambdaCapture01 {
aoqi@0: 
aoqi@0:     static int assertionCount = 0;
aoqi@0: 
aoqi@0:     static void assertTrue(boolean cond) {
aoqi@0:         assertionCount++;
aoqi@0:         if (!cond)
aoqi@0:             throw new AssertionError();
aoqi@0:     }
aoqi@0: 
aoqi@0:     interface Tester {
aoqi@0:         void test();
aoqi@0:     }
aoqi@0: 
aoqi@0:     interface TU<T, U> {
aoqi@0:         public T foo(U u);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static <T, U> T exec(TU<T, U> lambda, U x) {
aoqi@0:         return lambda.foo(x);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public int n = 5;
aoqi@0: 
aoqi@0:     //Simple local capture
aoqi@0:     void test1() {
aoqi@0:         final int N = 1;
aoqi@0:         int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N, 3);
aoqi@0:         assertTrue(4 == res);
aoqi@0:     }
aoqi@0: 
aoqi@0:     //Local capture with multiple scopes (anon class)
aoqi@0:     void test2() {
aoqi@0:         final int N = 1;
aoqi@0:         new Tester() {
aoqi@0:             public void test() {
aoqi@0:                 final int M = 2;
aoqi@0:                 int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3);
aoqi@0:                 assertTrue(6 == res);
aoqi@0:             }
aoqi@0:         }.test();
aoqi@0:     }
aoqi@0: 
aoqi@0:     //Local capture with multiple scopes (local class)
aoqi@0:     void test3() {
aoqi@0:         final int N = 1;
aoqi@0:         class MyTester implements Tester {
aoqi@0:             public void test() {
aoqi@0:                 final int M = 2;
aoqi@0:                 int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3);
aoqi@0:                 assertTrue(6 == res);
aoqi@0:             }
aoqi@0:         }
aoqi@0:         new MyTester().test();
aoqi@0:     }
aoqi@0: 
aoqi@0:     //access to field from enclosing scope
aoqi@0:     void test4() {
aoqi@0:         final int N = 4;
aoqi@0:         int res1 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + n + N, 3);
aoqi@0:         assertTrue(12 == res1);
aoqi@0:         int res2 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + LambdaCapture01.this.n + N, 3);
aoqi@0:         assertTrue(12 == res2);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static void main(String[] args) {
aoqi@0:         LambdaCapture01 t = new LambdaCapture01();
aoqi@0:         t.test1();
aoqi@0:         t.test2();
aoqi@0:         t.test3();
aoqi@0:         t.test4();
aoqi@0:         assertTrue(assertionCount == 5);
aoqi@0:     }
aoqi@0: }