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  */
  23 
  24 /*
  25  * @test
  26  * @bug 6960211
  27  * @summary JavaScript engine allows creation of interface although methods not available.
  28  */
  29 
  30 import javax.script.*;
  31 
  32 public class GetInterfaceTest {
  33     public static void main(String[] args) throws Exception {
  34         ScriptEngineManager manager = new ScriptEngineManager();
  35         ScriptEngine engine = manager.getEngineByName("js");
  36 
  37         if (engine == null) {
  38             System.out.println("Warning: No engine engine found; test vacuously passes.");
  39             return;
  40         }
  41 
  42         // don't define any function.
  43         engine.eval("");
  44 
  45         Runnable runnable = ((Invocable)engine).getInterface(Runnable.class);
  46         if (runnable != null) {
  47             throw new RuntimeException("runnable is not null!");
  48         }
  49 
  50         // now define "run"
  51         engine.eval("function run() { println('this is run function'); }");
  52         runnable = ((Invocable)engine).getInterface(Runnable.class);
  53         // should not return null now!
  54         runnable.run();
  55 
  56         // define only one method of "Foo2"
  57         engine.eval("function bar() { println('bar function'); }");
  58         Foo2 foo2 = ((Invocable)engine).getInterface(Foo2.class);
  59         if (foo2 != null) {
  60             throw new RuntimeException("foo2 is not null!");
  61         }
  62 
  63         // now define other method of "Foo2"
  64         engine.eval("function bar2() { println('bar2 function'); }");
  65         foo2 = ((Invocable)engine).getInterface(Foo2.class);
  66         foo2.bar();
  67         foo2.bar2();
  68     }
  69 
  70     interface Foo {
  71         public void bar();
  72     }
  73 
  74     interface Foo2 extends Foo {
  75         public void bar2();
  76     }
  77 }