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