/** Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved. Contact: SYSTAP, LLC DBA Blazegraph 2501 Calvert ST NW #106 Washington, DC 20008 licenses@blazegraph.com This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * Created on Sep 15, 2007 */ package com.bigdata.util; import junit.framework.TestCase; /** * Test suite for {@link HybridTimestampFactory}. * * @todo test ctor correct acceptance and correct rejection and internally * computed fields. * * @todo test with all legal ctor values for counterBits and plot the #of * distinct timestamps per millisecond as a function of counterBits. * * @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a> * @version $Id$ */ public class TestHybridTimestampFactory extends TestCase { /** * */ public TestHybridTimestampFactory() { super(); } /** * @param arg0 */ public TestHybridTimestampFactory(String arg0) { super(arg0); } /** * Test verifies that timestamps are always distinct from the last generated * timestamp as generated by {@link HybridTimestampFactory#nextMillis()} and * notes the actual granularity of the generated timestamps. */ public void test_nextTimestamp2() { final int limit = 100000; HybridTimestampFactory timestampFactory = new HybridTimestampFactory(10); final long begin = System.currentTimeMillis(); long lastTimestamp = begin - 1; long timestamp; for( int i=0; i<limit; i++ ) { timestamp = timestampFactory.nextTimestamp(); if (timestamp == lastTimestamp) fail("Same timestamp?"); if (timestamp < lastTimestamp) fail("Time goes backwards?"); lastTimestamp = timestamp; } long elapsed = System.currentTimeMillis() - begin; System.err.println("Generated " + limit + " timestamps in " + elapsed + " milliseconds: ts/ms: " + limit / (double) elapsed); System.err.println("The #of times the factory invoked Thread.sleep(): " + timestampFactory.getSleepCounter()); } }