1 /*
   2  * Copyright (c) 2015, 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 import java.util.regex.Matcher;
  25 import java.util.regex.Pattern;
  26 
  27 import com.oracle.java.testlibrary.Asserts;
  28 
  29 /*
  30  * @test TestPrintGCTimeStampsEnabled
  31  * @summary test checks -XX:+PrintGCDateStamps enables date stamps printing
  32  * @key gc
  33  * @library /testlibrary
  34  * @run main/othervm -Xmx128M -Xloggc:PrintGCTimeStampsEnabled.txt -XX:+PrintGC -XX:+PrintGCTimeStamps GCTask
  35  * @run main TestPrintGCTimeStampsEnabled
  36  */
  37 public class TestPrintGCTimeStampsEnabled extends AbstractPrintGCTest {
  38 
  39     public void runTest() {
  40         String content = getContent();
  41         Pattern pattern = Pattern.compile("^(\\d+\\.\\d+):.*\\[GC", Pattern.MULTILINE);
  42         Matcher matcher = pattern.matcher(content);
  43         float gcLastRunTimestamp = 0.0f;
  44         while (matcher.find()) {
  45             String match = matcher.group(1);
  46             float timestamp = Float.parseFloat(match);
  47             Asserts.assertGreaterThanOrEqual(timestamp, gcLastRunTimestamp,
  48                     "GC timestamps are inconsistent");
  49             gcLastRunTimestamp = timestamp;
  50         }
  51     }
  52 
  53     public static void main(String[] args) {
  54         new TestPrintGCTimeStampsEnabled().runTest();
  55     }
  56 }