1 /* 2 * Copyright 2010 The Apache Software Foundation 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 package org.apache.hadoop.hbase.util; 21 22 import org.junit.Test; 23 24 import static junit.framework.Assert.assertTrue; 25 import static junit.framework.Assert.fail; 26 27 /** 28 * Tests to make sure that the default environment edge conforms to appropriate 29 * behaviour. 30 */ 31 public class TestDefaultEnvironmentEdge { 32 33 @Test 34 public void testGetCurrentTimeUsesSystemClock() { 35 DefaultEnvironmentEdge edge = new DefaultEnvironmentEdge(); 36 long systemTime = System.currentTimeMillis(); 37 long edgeTime = edge.currentTimeMillis(); 38 assertTrue("System time must be either the same or less than the edge time", 39 systemTime < edgeTime || systemTime == edgeTime); 40 try { 41 Thread.sleep(1); 42 } catch (InterruptedException e) { 43 fail(e.getMessage()); 44 } 45 long secondEdgeTime = edge.currentTimeMillis(); 46 assertTrue("Second time must be greater than the first", 47 secondEdgeTime > edgeTime); 48 } 49 50 }