1/*
2 * Copyright (c) 2016, 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.  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
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24 */
25
26/* @test
27 * @run testng/othervm -ea -esa test.java.lang.invoke.ArrayLengthTest
28 */
29package test.java.lang.invoke;
30
31import java.lang.invoke.MethodHandle;
32import java.lang.invoke.MethodHandles;
33
34import static org.testng.AssertJUnit.*;
35
36import org.testng.annotations.*;
37
38public class ArrayLengthTest {
39
40    @DataProvider
41    Object[][] arrayClasses() {
42        return new Object[][] {
43                {int[].class},
44                {long[].class},
45                {float[].class},
46                {double[].class},
47                {boolean[].class},
48                {byte[].class},
49                {short[].class},
50                {char[].class},
51                {Object[].class},
52                {StringBuffer[].class}
53        };
54    }
55
56    @Test(dataProvider = "arrayClasses")
57    public void testArrayLength(Class<?> arrayClass) throws Throwable {
58        MethodHandle arrayLength = MethodHandles.arrayLength(arrayClass);
59        assertEquals(int.class, arrayLength.type().returnType());
60        assertEquals(arrayClass, arrayLength.type().parameterType(0));
61        Object array = MethodHandles.arrayConstructor(arrayClass).invoke(10);
62        assertEquals(10, arrayLength.invoke(array));
63    }
64
65    @Test(dataProvider = "arrayClasses", expectedExceptions = NullPointerException.class)
66    public void testArrayLengthInvokeNPE(Class<?> arrayClass) throws Throwable {
67        MethodHandle arrayLength = MethodHandles.arrayLength(arrayClass);
68        arrayLength.invoke(null);
69    }
70
71    @Test(expectedExceptions = IllegalArgumentException.class)
72    public void testArrayLengthNoArray() {
73        MethodHandles.arrayLength(String.class);
74    }
75
76    @Test(expectedExceptions = NullPointerException.class)
77    public void testArrayLengthNPE() {
78        MethodHandles.arrayLength(null);
79    }
80
81}
82