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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
* @run testng/othervm -ea -esa test.java.lang.invoke.ArrayLengthTest
*/
package test.java.lang.invoke;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import static org.testng.AssertJUnit.*;
import org.testng.annotations.*;
public class ArrayLengthTest {
@DataProvider
Object[][] arrayClasses() {
return new Object[][] {
{int[].class},
{long[].class},
{float[].class},
{double[].class},
{boolean[].class},
{byte[].class},
{short[].class},
{char[].class},
{Object[].class},
{StringBuffer[].class}
};
}
@Test(dataProvider = "arrayClasses")
public void testArrayLength(Class<?> arrayClass) throws Throwable {
MethodHandle arrayLength = MethodHandles.arrayLength(arrayClass);
assertEquals(int.class, arrayLength.type().returnType());
assertEquals(arrayClass, arrayLength.type().parameterType(0));
Object array = MethodHandles.arrayConstructor(arrayClass).invoke(10);
assertEquals(10, arrayLength.invoke(array));
}
@Test(dataProvider = "arrayClasses", expectedExceptions = NullPointerException.class)
public void testArrayLengthInvokeNPE(Class<?> arrayClass) throws Throwable {
MethodHandle arrayLength = MethodHandles.arrayLength(arrayClass);
arrayLength.invoke(null);
}
@Test(expectedExceptions = IllegalArgumentException.class)
public void testArrayLengthNoArray() {
MethodHandles.arrayLength(String.class);
}
@Test(expectedExceptions = NullPointerException.class)
public void testArrayLengthNPE() {
MethodHandles.arrayLength(null);
}
@Test(expectedExceptions = NullPointerException.class)
public void testNullReference() throws Throwable {
MethodHandle arrayLength = MethodHandles.arrayLength(String[].class);
int len = (int)arrayLength.invokeExact((String[])null);
}
}
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