1 /*

     2  * Copyright (c) 2012, 2013, 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  */

    23 

    24 import org.testng.annotations.Test;

    25 

    26 import static org.testng.Assert.assertEquals;

    27 

    28 /**

    29  * @author Robert Field

    30  */

    31 

    32 @Test

    33 public class MethodReferenceTestInnerInstance {

    34 

    35     public void testMethodReferenceInnerInstance() {

    36         cia().cib().testMethodReferenceInstance();

    37     }

    38 

    39     public void testMethodReferenceInnerExternal() {

    40         cia().cib().testMethodReferenceExternal();

    41     }

    42 

    43     interface SI {

    44         String m(Integer a);

    45     }

    46 

    47     class CIA {

    48 

    49         String xI(Integer i) {

    50             return "xI:" + i;

    51         }

    52 

    53         public class CIB {

    54 

    55             public void testMethodReferenceInstance() {

    56                 SI q;

    57 

    58                 q = CIA.this::xI;

    59                 assertEquals(q.m(55), "xI:55");

    60             }

    61 

    62             public void testMethodReferenceExternal() {

    63                 SI q;

    64 

    65                 q = (new E())::xI;

    66                 assertEquals(q.m(77), "ExI:77");

    67             }

    68         }

    69 

    70         CIB cib() {

    71             return new CIB();

    72         }

    73 

    74         class E {

    75 

    76             String xI(Integer i) {

    77                 return "ExI:" + i;

    78             }

    79         }

    80 

    81     }

    82 

    83     CIA cia() {

    84         return new CIA();

    85     }

    86 }