/*

 * 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.

 *

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/* @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);

    }

}