001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.util; 019 020import static junit.framework.Assert.assertTrue; 021import static junit.framework.Assert.fail; 022 023import org.apache.hadoop.hbase.HBaseClassTestRule; 024import org.apache.hadoop.hbase.testclassification.MediumTests; 025import org.apache.hadoop.hbase.testclassification.MiscTests; 026import org.junit.ClassRule; 027import org.junit.Test; 028import org.junit.experimental.categories.Category; 029 030/** 031 * Tests to make sure that the default environment edge conforms to appropriate 032 * behaviour. 033 */ 034@Category({MiscTests.class, MediumTests.class}) 035public class TestDefaultEnvironmentEdge { 036 037 @ClassRule 038 public static final HBaseClassTestRule CLASS_RULE = 039 HBaseClassTestRule.forClass(TestDefaultEnvironmentEdge.class); 040 041 @Test 042 public void testGetCurrentTimeUsesSystemClock() { 043 DefaultEnvironmentEdge edge = new DefaultEnvironmentEdge(); 044 long systemTime = System.currentTimeMillis(); 045 long edgeTime = edge.currentTime(); 046 assertTrue("System time must be either the same or less than the edge time", 047 systemTime < edgeTime || systemTime == edgeTime); 048 try { 049 Thread.sleep(1); 050 } catch (InterruptedException e) { 051 fail(e.getMessage()); 052 } 053 long secondEdgeTime = edge.currentTime(); 054 assertTrue("Second time must be greater than the first", 055 secondEdgeTime > edgeTime); 056 } 057}