1 /* 2 * Copyright (c) 2011, 2013, 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 @summary <rdar://problem/4064974> 27 @summary Tests nano time and also makes sure that it does not take too long to make consecutive time calls 28 @summary com.apple.junit.java.vm 29 @run junit nanoTime_R4064974 30 */ 31 32 import junit.framework.*; 33 34 import static java.lang.System.currentTimeMillis; 35 import static java.lang.System.nanoTime; 36 37 public class nanoTime_R4064974 extends TestCase { 38 public void testnanoTime_R4064974() throws Exception { 39 long time = 0; 40 long newTime; 41 long smaller = 9999999999999L; 42 43 for (int i = 0; i < 10000; i++) { 44 time = nanoTime(); 45 newTime = nanoTime(); 46 smaller = Math.min(smaller, newTime - time); 47 } 48 49 long milliTime = currentTimeMillis(); 50 long nanoTime = nanoTime(); 51 assertTrue("it's taking to long to call nanoTime() after calling currentTimeMillis()", (nanoTime - (milliTime * 1000000)) < 5000000); 52 } 53 54 public static Test suite() { 55 return new TestSuite(nanoTime_R4064974.class); 56 } 57 58 public static void main (String[] args) throws RuntimeException { 59 TestResult tr = junit.textui.TestRunner.run(suite()); 60 if((tr.errorCount() != 0) || (tr.failureCount() != 0)) { 61 throw new RuntimeException("### Unexpected JUnit errors or failures."); 62 } 63 } 64 }