1 /*
2  * Copyright (c) 2020, 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.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /*
25  * @test
26  * @run testng ConvertTest
27  */
28 
29 import org.testng.annotations.DataProvider;
30 import org.testng.annotations.Test;
31 
32 import java.lang.invoke.ConstantBootstraps;
33 import java.math.BigInteger;
34 
35 import static org.testng.Assert.assertEquals;
36 
37 public class ConvertTest {
38 
39     @DataProvider
40     public static Object[][] cceInputs() {
41         return new Object[][]{
42             { void.class, null },
43             { Integer.class, "a" },
44             { int.class, BigInteger.ZERO },
45         };
46     }
47 
48     @Test(dataProvider = "cceInputs", expectedExceptions = ClassCastException.class)
49     public void testBadConversion(Class<?> dstType, Object value) {
50         ConstantBootstraps.explicitCast(null, null, dstType, value);
51     }
52 
53     @DataProvider
54     public static Object[][] goodInputs() {
55         Object o = new Object();
56         return new Object[][]{
57             { Object.class, null, null },
58             { Object.class, o, o },
59             { String.class, "abc", "abc" },
60             { short.class, 10, (short) 10 },
61             { int.class, (short) 10, 10 },
62             { boolean.class, 1, true },
63             { boolean.class, 2, false },
64             { int.class, true, 1 },
65             { int.class, false, 0 },
66             { int.class, 10, 10 },
67             { Integer.class, 10, 10 },
68             { Object.class, 10, 10 },
69             { Number.class, 10, 10 },
70         };
71     }
72 
73     @Test(dataProvider = "goodInputs")
74     public void testSuccess(Class<?> dstType, Object value, Object expected) {
75         Object actual = ConstantBootstraps.explicitCast(null, null, dstType, value);
76         assertEquals(actual, expected);
77     }
78 
79 }
80