1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/lambda/LambdaCapture01.java Wed Apr 27 01:34:52 2016 +0800
1.3 @@ -0,0 +1,107 @@
1.4 +/*
1.5 + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/*
1.28 + * @test
1.29 + * @bug 8003280
1.30 + * @summary Add lambda tests
1.31 + * basic test for capture of non-mutable locals
1.32 + * @author Brian Goetz
1.33 + * @author Maurizio Cimadamore
1.34 + * @run main LambdaCapture01
1.35 + */
1.36 +
1.37 +public class LambdaCapture01 {
1.38 +
1.39 + static int assertionCount = 0;
1.40 +
1.41 + static void assertTrue(boolean cond) {
1.42 + assertionCount++;
1.43 + if (!cond)
1.44 + throw new AssertionError();
1.45 + }
1.46 +
1.47 + interface Tester {
1.48 + void test();
1.49 + }
1.50 +
1.51 + interface TU<T, U> {
1.52 + public T foo(U u);
1.53 + }
1.54 +
1.55 + public static <T, U> T exec(TU<T, U> lambda, U x) {
1.56 + return lambda.foo(x);
1.57 + }
1.58 +
1.59 + public int n = 5;
1.60 +
1.61 + //Simple local capture
1.62 + void test1() {
1.63 + final int N = 1;
1.64 + int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N, 3);
1.65 + assertTrue(4 == res);
1.66 + }
1.67 +
1.68 + //Local capture with multiple scopes (anon class)
1.69 + void test2() {
1.70 + final int N = 1;
1.71 + new Tester() {
1.72 + public void test() {
1.73 + final int M = 2;
1.74 + int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3);
1.75 + assertTrue(6 == res);
1.76 + }
1.77 + }.test();
1.78 + }
1.79 +
1.80 + //Local capture with multiple scopes (local class)
1.81 + void test3() {
1.82 + final int N = 1;
1.83 + class MyTester implements Tester {
1.84 + public void test() {
1.85 + final int M = 2;
1.86 + int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3);
1.87 + assertTrue(6 == res);
1.88 + }
1.89 + }
1.90 + new MyTester().test();
1.91 + }
1.92 +
1.93 + //access to field from enclosing scope
1.94 + void test4() {
1.95 + final int N = 4;
1.96 + int res1 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + n + N, 3);
1.97 + assertTrue(12 == res1);
1.98 + int res2 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + LambdaCapture01.this.n + N, 3);
1.99 + assertTrue(12 == res2);
1.100 + }
1.101 +
1.102 + public static void main(String[] args) {
1.103 + LambdaCapture01 t = new LambdaCapture01();
1.104 + t.test1();
1.105 + t.test2();
1.106 + t.test3();
1.107 + t.test4();
1.108 + assertTrue(assertionCount == 5);
1.109 + }
1.110 +}
