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