mcimadamore@1415: /*
mcimadamore@1415:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
mcimadamore@1415:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mcimadamore@1415:  *
mcimadamore@1415:  * This code is free software; you can redistribute it and/or modify it
mcimadamore@1415:  * under the terms of the GNU General Public License version 2 only, as
mcimadamore@1415:  * published by the Free Software Foundation.
mcimadamore@1415:  *
mcimadamore@1415:  * This code is distributed in the hope that it will be useful, but WITHOUT
mcimadamore@1415:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mcimadamore@1415:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mcimadamore@1415:  * version 2 for more details (a copy is included in the LICENSE file that
mcimadamore@1415:  * accompanied this code).
mcimadamore@1415:  *
mcimadamore@1415:  * You should have received a copy of the GNU General Public License version
mcimadamore@1415:  * 2 along with this work; if not, write to the Free Software Foundation,
mcimadamore@1415:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mcimadamore@1415:  *
mcimadamore@1415:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mcimadamore@1415:  * or visit www.oracle.com if you need additional information or have any
mcimadamore@1415:  * questions.
mcimadamore@1415:  */
mcimadamore@1415: 
mcimadamore@1415: /*
mcimadamore@1415:  * @test
mcimadamore@1415:  * @bug 8003280
mcimadamore@1415:  * @summary Add lambda tests
mcimadamore@1415:  *  basic test for lambda conversion
mcimadamore@1415:  * @author  Brian Goetz
mcimadamore@1415:  * @author  Maurizio Cimadamore
mcimadamore@1415:  * @run main LambdaConv01
mcimadamore@1415:  */
mcimadamore@1415: 
mcimadamore@1415: public class LambdaConv01 {
mcimadamore@1415: 
mcimadamore@1415:     static int assertionCount = 0;
mcimadamore@1415: 
mcimadamore@1415:     static void assertTrue(boolean cond) {
mcimadamore@1415:         assertionCount++;
mcimadamore@1415:         if (!cond)
mcimadamore@1415:             throw new AssertionError();
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     interface IntToInt {
mcimadamore@1415:       public int foo(int x);
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     interface IntToVoid {
mcimadamore@1415:       public void foo(int x);
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     interface VoidToInt {
mcimadamore@1415:       public int foo();
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     interface TU<T, U> {
mcimadamore@1415:       public T foo(U u);
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     public static <T, U> T exec(TU<T, U> lambda, U x) {
mcimadamore@1415:         return lambda.foo(x);
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     static {
mcimadamore@1415:         //Assignment conversion:
mcimadamore@1415:         VoidToInt f1 = ()-> 3;
mcimadamore@1415:         assertTrue(3 == f1.foo());
mcimadamore@1415:         //Covariant returns:
mcimadamore@1415:         TU<Number, Integer> f2 = (Integer x) -> x;
mcimadamore@1415:         assertTrue(3 == f2.foo(3));
mcimadamore@1415:         //Method resolution with boxing:
mcimadamore@1415:         int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
mcimadamore@1415:         assertTrue(3 == res);
mcimadamore@1415:         //Runtime exception transparency:
mcimadamore@1415:         try {
mcimadamore@1415:             LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
mcimadamore@1415:         }
mcimadamore@1415:         catch (RuntimeException e) {
mcimadamore@1415:             assertTrue(true);
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     {
mcimadamore@1415:         //Assignment conversion:
mcimadamore@1415:         VoidToInt f1 = ()-> 3;
mcimadamore@1415:         assertTrue(3 == f1.foo());
mcimadamore@1415:         //Covariant returns:
mcimadamore@1415:         TU<Number, Integer> f2 = (Integer x) -> x;
mcimadamore@1415:         assertTrue(3 == f2.foo(3));
mcimadamore@1415:         //Method resolution with boxing:
mcimadamore@1415:         int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
mcimadamore@1415:         assertTrue(3 == res);
mcimadamore@1415:         //Runtime exception transparency:
mcimadamore@1415:         try {
mcimadamore@1415:             LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
mcimadamore@1415:         }
mcimadamore@1415:         catch (RuntimeException e) {
mcimadamore@1415:             assertTrue(true);
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     public static void test1() {
mcimadamore@1415:         //Assignment conversion:
mcimadamore@1415:         VoidToInt f1 = ()-> 3;
mcimadamore@1415:         assertTrue(3 == f1.foo());
mcimadamore@1415:         //Covariant returns:
mcimadamore@1415:         TU<Number, Integer> f2 = (Integer x) -> x;
mcimadamore@1415:         assertTrue(3 == f2.foo(3));
mcimadamore@1415:         //Method resolution with boxing:
mcimadamore@1415:         int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
mcimadamore@1415:         assertTrue(3 == res);
mcimadamore@1415:         //Runtime exception transparency:
mcimadamore@1415:         try {
mcimadamore@1415:             LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
mcimadamore@1415:         }
mcimadamore@1415:         catch (RuntimeException e) {
mcimadamore@1415:             assertTrue(true);
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     public void test2() {
mcimadamore@1415:         //Assignment conversion:
mcimadamore@1415:         VoidToInt f1 = ()-> 3;
mcimadamore@1415:         assertTrue(3 == f1.foo());
mcimadamore@1415:         //Covariant returns:
mcimadamore@1415:         TU<Number, Integer> f2 = (Integer x) -> x;
mcimadamore@1415:         assertTrue(3 == f2.foo(3));
mcimadamore@1415:         //Method resolution with boxing:
mcimadamore@1415:         int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
mcimadamore@1415:         assertTrue(3 == res);
mcimadamore@1415:         //Runtime exception transparency:
mcimadamore@1415:         try {
mcimadamore@1415:             LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
mcimadamore@1415:         }
mcimadamore@1415:         catch (RuntimeException e) {
mcimadamore@1415:             assertTrue(true);
mcimadamore@1415:         }
mcimadamore@1415:     }
mcimadamore@1415: 
mcimadamore@1415:     public static void main(String[] args) {
mcimadamore@1415:         test1();
mcimadamore@1415:         new LambdaConv01().test2();
mcimadamore@1415:         assertTrue(assertionCount == 16);
mcimadamore@1415:     }
mcimadamore@1415: }