1 /*
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   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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /* @test
  27  * @bug 8155106
  28  * @run testng/othervm -ea -esa test.java.lang.invoke.ArrayConstructorTest
  29  */
  30 package test.java.lang.invoke;
  31 
  32 import java.lang.invoke.MethodHandle;
  33 import java.lang.invoke.MethodHandles;
  34 
  35 import static java.lang.invoke.MethodType.methodType;
  36 
  37 import static org.testng.AssertJUnit.*;
  38 
  39 import org.testng.annotations.*;
  40 
  41 
  42 public class ArrayConstructorTest {
  43 
  44     static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
  45 
  46     @Test
  47     public static void testFindConstructorArray() {
  48         boolean caught = false;
  49         try {
  50             MethodHandle h = LOOKUP.findConstructor(Object[].class, methodType(void.class));
  51         } catch (NoSuchMethodException nsme) {
  52             assertEquals("no constructor for array class: [Ljava.lang.Object;", nsme.getMessage());
  53             caught = true;
  54         } catch (Exception e) {
  55             throw new AssertionError("unexpected exception: " + e);
  56         }
  57         assertTrue(caught);
  58     }
  59 
  60     @DataProvider
  61     static Object[][] arrayConstructorNegative() {
  62         return new Object[][]{
  63                 {String.class, IllegalArgumentException.class, "not an array class: java.lang.String"},
  64                 {null, NullPointerException.class, null}
  65         };
  66     }
  67 
  68     @Test(dataProvider = "arrayConstructorNegative")
  69     public static void testArrayConstructorNegative(Class<?> clazz, Class<?> exceptionClass, String message) {
  70         boolean caught = false;
  71         try {
  72             MethodHandle h = MethodHandles.arrayConstructor(clazz);
  73         } catch (Exception e) {
  74             assertEquals(exceptionClass, e.getClass());
  75             if (message != null) {
  76                 assertEquals(message, e.getMessage());
  77             }
  78             caught = true;
  79         }
  80         assertTrue(caught);
  81     }
  82 
  83     @Test
  84     public static void testArrayConstructor() throws Throwable {
  85         MethodHandle h = MethodHandles.arrayConstructor(String[].class);
  86         assertEquals(methodType(String[].class, int.class), h.type());
  87         String[] a = (String[]) h.invoke(17);
  88         assertEquals(17, a.length);
  89     }
  90 
  91 }