Thu, 10 Oct 2013 14:58:04 +0200
8001931: The new build system whitespace cleanup
Reviewed-by: tbell, simonis, erikj
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
24 /*
25 * @test
26 * @bug 8003280
27 * @summary Add lambda tests
28 * basic test for capture of non-mutable locals
29 * @author Brian Goetz
30 * @author Maurizio Cimadamore
31 * @run main LambdaCapture01
32 */
34 public class LambdaCapture01 {
36 static int assertionCount = 0;
38 static void assertTrue(boolean cond) {
39 assertionCount++;
40 if (!cond)
41 throw new AssertionError();
42 }
44 interface Tester {
45 void test();
46 }
48 interface TU<T, U> {
49 public T foo(U u);
50 }
52 public static <T, U> T exec(TU<T, U> lambda, U x) {
53 return lambda.foo(x);
54 }
56 public int n = 5;
58 //Simple local capture
59 void test1() {
60 final int N = 1;
61 int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N, 3);
62 assertTrue(4 == res);
63 }
65 //Local capture with multiple scopes (anon class)
66 void test2() {
67 final int N = 1;
68 new Tester() {
69 public void test() {
70 final int M = 2;
71 int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3);
72 assertTrue(6 == res);
73 }
74 }.test();
75 }
77 //Local capture with multiple scopes (local class)
78 void test3() {
79 final int N = 1;
80 class MyTester implements Tester {
81 public void test() {
82 final int M = 2;
83 int res = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + N + M, 3);
84 assertTrue(6 == res);
85 }
86 }
87 new MyTester().test();
88 }
90 //access to field from enclosing scope
91 void test4() {
92 final int N = 4;
93 int res1 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + n + N, 3);
94 assertTrue(12 == res1);
95 int res2 = LambdaCapture01.<Integer,Integer>exec((Integer x) -> x + LambdaCapture01.this.n + N, 3);
96 assertTrue(12 == res2);
97 }
99 public static void main(String[] args) {
100 LambdaCapture01 t = new LambdaCapture01();
101 t.test1();
102 t.test2();
103 t.test3();
104 t.test4();
105 assertTrue(assertionCount == 5);
106 }
107 }