| /* |
| * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8003280 |
| * @summary Add lambda tests |
| * basic test for lambda conversion |
| * @author Brian Goetz |
| * @author Maurizio Cimadamore |
| * @run main LambdaConv01 |
| */ |
| |
| public class LambdaConv01 { |
| |
| static int assertionCount = 0; |
| |
| static void assertTrue(boolean cond) { |
| assertionCount++; |
| if (!cond) |
| throw new AssertionError(); |
| } |
| |
| interface IntToInt { |
| public int foo(int x); |
| } |
| |
| interface IntToVoid { |
| public void foo(int x); |
| } |
| |
| interface VoidToInt { |
| public int foo(); |
| } |
| |
| 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); |
| } |
| |
| static { |
| //Assignment conversion: |
| VoidToInt f1 = ()-> 3; |
| assertTrue(3 == f1.foo()); |
| //Covariant returns: |
| TU<Number, Integer> f2 = (Integer x) -> x; |
| assertTrue(3 == f2.foo(3).intValue()); |
| //Method resolution with boxing: |
| int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3); |
| assertTrue(3 == res); |
| //Runtime exception transparency: |
| try { |
| LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null); |
| } |
| catch (RuntimeException e) { |
| assertTrue(true); |
| } |
| } |
| |
| { |
| //Assignment conversion: |
| VoidToInt f1 = ()-> 3; |
| assertTrue(3 == f1.foo()); |
| //Covariant returns: |
| TU<Number, Integer> f2 = (Integer x) -> x; |
| assertTrue(3 == f2.foo(3).intValue()); |
| //Method resolution with boxing: |
| int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3); |
| assertTrue(3 == res); |
| //Runtime exception transparency: |
| try { |
| LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null); |
| } |
| catch (RuntimeException e) { |
| assertTrue(true); |
| } |
| } |
| |
| public static void test1() { |
| //Assignment conversion: |
| VoidToInt f1 = ()-> 3; |
| assertTrue(3 == f1.foo()); |
| //Covariant returns: |
| TU<Number, Integer> f2 = (Integer x) -> x; |
| assertTrue(3 == f2.foo(3).intValue()); |
| //Method resolution with boxing: |
| int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3); |
| assertTrue(3 == res); |
| //Runtime exception transparency: |
| try { |
| LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null); |
| } |
| catch (RuntimeException e) { |
| assertTrue(true); |
| } |
| } |
| |
| public void test2() { |
| //Assignment conversion: |
| VoidToInt f1 = ()-> 3; |
| assertTrue(3 == f1.foo()); |
| //Covariant returns: |
| TU<Number, Integer> f2 = (Integer x) -> x; |
| assertTrue(3 == f2.foo(3).intValue()); |
| //Method resolution with boxing: |
| int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3); |
| assertTrue(3 == res); |
| //Runtime exception transparency: |
| try { |
| LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null); |
| } |
| catch (RuntimeException e) { |
| assertTrue(true); |
| } |
| } |
| |
| public static void main(String[] args) { |
| test1(); |
| new LambdaConv01().test2(); |
| assertTrue(assertionCount == 16); |
| } |
| } |