1/*
2 * Copyright (c) 2005, 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 * @bug 4261170
27 * @summary Tests for Random.nextBytes
28 * @author Martin Buchholz
29 */
30
31import java.util.*;
32
33public class NextBytes {
34    private static void realMain(String[] args) throws Throwable {
35        byte[] expected = new byte[]
36            {27, -105, -24, 83, -77, -29, 119, -74, -106, 68, 54};
37        Random r = new java.util.Random(2398579034L);
38        for (int i = 0; i <= expected.length; i++) {
39            r.setSeed(2398579034L);
40            byte[] actual = new byte[i];
41            r.nextBytes(actual);
42            //System.out.println(Arrays.toString(actual));
43            check(Arrays.equals(actual, Arrays.copyOf(expected,i)));
44        }
45    }
46
47    //--------------------- Infrastructure ---------------------------
48    static volatile int passed = 0, failed = 0;
49    static void pass() {passed++;}
50    static void fail() {failed++; Thread.dumpStack();}
51    static void fail(String msg) {System.out.println(msg); fail();}
52    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
53    static void check(boolean cond) {if (cond) pass(); else fail();}
54    static void equal(Object x, Object y) {
55        if (x == null ? y == null : x.equals(y)) pass();
56        else fail(x + " not equal to " + y);}
57    public static void main(String[] args) throws Throwable {
58        try {realMain(args);} catch (Throwable t) {unexpected(t);}
59        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
60        if (failed > 0) throw new AssertionError("Some tests failed");}
61}
62