1 /*
   2  * Copyright (c) 2017, 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  * @summary basic test for reflection on MVT
  27  * @build Point
  28  * @run testng/othervm -Xint -Xverify:none -XX:+EnableMVT MVTReflectionTest
  29  */
  30 
  31 import jdk.experimental.value.ValueType;
  32 
  33 import org.testng.annotations.Test;
  34 import static org.testng.Assert.*;
  35 
  36 @Test
  37 public class MVTReflectionTest {
  38     private static Class<?> VCC = Point.class;
  39     private static ValueType<?> VT = ValueType.forClass(VCC);
  40     private static Class<?> DVT = VT.valueClass();
  41 
  42     public void testValueCapableClass() throws Exception {
  43         Class<?> pointClass = Class.forName("Point");
  44         assertEquals(pointClass, VCC);
  45 
  46         // test getSuperClass
  47         assertEquals(pointClass.getSuperclass(), Object.class);
  48 
  49         // test getFields and getDeclaredFields
  50         assertTrue(pointClass.getFields().length == 3);
  51         assertTrue(pointClass.getDeclaredFields().length == 3);
  52     }
  53 
  54     public void testDerivedValueType() throws Exception {
  55         // test Class.forName
  56         try {
  57             Class<?> c = Class.forName(DVT.getName());
  58             throw new RuntimeException("should fail to load " + c);
  59         } catch (ClassNotFoundException e) {}
  60 
  61         Module m = Point.class.getClassLoader().getUnnamedModule();
  62         Class<?> c = Class.forName(m, DVT.getName());
  63         assertEquals(c, null);
  64 
  65         // test getSuperClass
  66         assertEquals(DVT.getSuperclass(), __Value.class);
  67 
  68         // test getFields and getDeclaredFields
  69         try {
  70             DVT.getFields();
  71             throw new RuntimeException("should fail to getFields on " + DVT);
  72         } catch (UnsupportedOperationException e) {}
  73 
  74         try {
  75             DVT.newInstance();
  76             throw new RuntimeException("should fail to newInstance on " + DVT);
  77         } catch (UnsupportedOperationException e) {}
  78     }
  79 
  80     public void testValueTypeArray() throws Exception {
  81         Point[] points = new Point[0];
  82 
  83         Class<?> c1 = Class.forName("[LPoint;");
  84         Class<?> c2 = VT.arrayValueClass();
  85         assertEquals(c1, points.getClass());
  86 
  87         String name = "[Q" + DVT.getName() + ";";
  88         assertEquals(name, c2.getName());
  89 
  90         // cannot load an array DVT class
  91         try {
  92             Class.forName(name);
  93             throw new RuntimeException("should fail to load " + name);
  94         } catch (ClassNotFoundException e) {}
  95     }
  96 }