1 /*
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19 package org.apache.hadoop.hbase.util;
20
21 import org.apache.hadoop.hbase.testclassification.MediumTests;
22 import org.junit.Test;
23 import org.junit.experimental.categories.Category;
24
25 import static junit.framework.Assert.assertTrue;
26 import static junit.framework.Assert.fail;
27
28 /**
29 * Tests to make sure that the default environment edge conforms to appropriate
30 * behaviour.
31 */
32 @Category(MediumTests.class)
33 public class TestDefaultEnvironmentEdge {
34
35 @Test
36 public void testGetCurrentTimeUsesSystemClock() {
37 DefaultEnvironmentEdge edge = new DefaultEnvironmentEdge();
38 long systemTime = System.currentTimeMillis();
39 long edgeTime = edge.currentTime();
40 assertTrue("System time must be either the same or less than the edge time",
41 systemTime < edgeTime || systemTime == edgeTime);
42 try {
43 Thread.sleep(1);
44 } catch (InterruptedException e) {
45 fail(e.getMessage());
46 }
47 long secondEdgeTime = edge.currentTime();
48 assertTrue("Second time must be greater than the first",
49 secondEdgeTime > edgeTime);
50 }
51 }