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ArrayConstructorTest.java
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ArrayConstructorTest.java
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/*
* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 8155106
* @run testng/othervm -ea -esa test.java.lang.invoke.ArrayConstructorTest
*/
package test.java.lang.invoke;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import static java.lang.invoke.MethodType.methodType;
import static org.testng.AssertJUnit.*;
import org.testng.annotations.*;
public class ArrayConstructorTest {
static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
@Test
public static void testFindConstructorArray() {
boolean caught = false;
try {
MethodHandle h = LOOKUP.findConstructor(Object[].class, methodType(void.class));
} catch (NoSuchMethodException nsme) {
assertEquals("no constructor for array class: [Ljava.lang.Object;", nsme.getMessage());
caught = true;
} catch (Exception e) {
throw new AssertionError("unexpected exception: " + e);
}
assertTrue(caught);
}
@DataProvider
static Object[][] arrayConstructorNegative() {
return new Object[][]{
{String.class, IllegalArgumentException.class, "not an array class: java.lang.String"},
{null, NullPointerException.class, null}
};
}
@Test(dataProvider = "arrayConstructorNegative")
public static void testArrayConstructorNegative(Class<?> clazz, Class<?> exceptionClass, String message) {
boolean caught = false;
try {
MethodHandle h = MethodHandles.arrayConstructor(clazz);
} catch (Exception e) {
assertEquals(exceptionClass, e.getClass());
if (message != null) {
assertEquals(message, e.getMessage());
}
caught = true;
}
assertTrue(caught);
}
@Test
public static void testArrayConstructor() throws Throwable {
MethodHandle h = MethodHandles.arrayConstructor(String[].class);
assertEquals(methodType(String[].class, int.class), h.type());
String[] a = (String[]) h.invoke(17);
assertEquals(17, a.length);
}
@Test(expectedExceptions = {NegativeArraySizeException.class})
public static void testArrayConstructorNegativeIndex() throws Throwable {
MethodHandle h = MethodHandles.arrayConstructor(String[].class);
assertEquals(methodType(String[].class, int.class), h.type());
h.invoke(-1); // throws exception
}
}