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 }