View Javadoc

1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.net.ntp;
18  
19  import java.util.Date;
20  import java.util.Calendar;
21  import junit.framework.TestCase;
22  
23  /**
24   * Test class that validates assertions for the basic TimeStamp operations and comparisons.
25   *
26   * @author Jason Mathews, MITRE Corp
27   */
28  public class TimeStampTest extends TestCase {
29  
30      private static final String TIME1 = "c1a9ae1c.cf6ac48d";  // Tue, Dec 17 2002 14:07:24.810 UTC
31      private static final String TIME2 = "c1a9ae1c.cf6ac48f";  // Tue, Dec 17 2002 14:07:24.810 UTC
32      private static final String TIME3 = "c1a9ae1d.cf6ac48e";  // Tue, Dec 17 2002 14:07:25.810 UTC
33  
34      public void testCompare() {
35  
36          TimeStamp ts1 = new TimeStamp(TIME1);   // Tue, Dec 17 2002 14:07:24.810 UTC
37          TimeStamp ts2 = new TimeStamp(TIME1);
38          TimeStamp ts3 = new TimeStamp(TIME2);   // Tue, Dec 17 2002 14:07:24.810 UTC
39          TimeStamp ts4 = new TimeStamp(TIME3);   // Tue, Dec 17 2002 14:07:25.810 UTC
40  
41          // do assertion tests on TimeStamp class
42          assertEquals("equals(1,2)", ts1, ts2);
43          assertEquals("compareTo(1,2)", 0, ts1.compareTo(ts2));
44          assertEquals("ntpValue(1,2)", ts1.ntpValue(), ts2.ntpValue());
45          assertEquals("hashCode(1,2)", ts1.hashCode(), ts2.hashCode());
46          assertEquals("ts1==ts1", ts1, ts1);
47  
48      // timestamps in ts1 (TIME1) and ts3 (TIME2) are only off by the smallest
49      // fraction of a second (~200 picoseconds) so the times are not equal but
50      // when converted to Java dates (in milliseconds) they will be equal.
51          assertTrue("ts1 != ts3", !ts1.equals(ts3));
52          assertEquals("compareTo(1,3)", -1, ts1.compareTo(ts3));
53          assertEquals("seconds", ts1.getSeconds(), ts3.getSeconds());
54          assertTrue("fraction", ts1.getFraction() != ts3.getFraction());
55          assertTrue("ntpValue(1,3)", ts1.ntpValue() != ts3.ntpValue());
56          assertTrue("hashCode(1,3)", ts1.hashCode() != ts3.hashCode());
57          long time1 = ts1.getTime();
58          long time3 = ts3.getTime();
59          assertEquals("equals(time1,3)", time1, time3); // ntpTime1 != ntpTime3 but JavaTime(t1) == JavaTime(t3)...
60  
61          assertTrue("ts3 != ts4", !ts3.equals(ts4));
62          assertTrue("time3 != ts4.time", time3 != ts4.getTime());
63      }
64  
65      public void testUTCString() {
66          TimeStamp ts1 = new TimeStamp(TIME1);   // Tue, Dec 17 2002 14:07:24.810 UTC
67      String actual = ts1.toUTCString();
68      assertEquals("Tue, Dec 17 2002 14:07:24.810 UTC", actual);
69      }
70  
71      public void testDateConversion() {
72      // convert current date to NtpTimeStamp then compare Java date
73      // computed from NTP timestamp with original Java date.
74      Calendar refCal = Calendar.getInstance(java.util.TimeZone.getTimeZone("UTC"));
75      Date refDate = refCal.getTime();
76      TimeStamp ts = new TimeStamp(refDate);
77      assertEquals("refDate.getTime()", refDate.getTime(), ts.getTime());
78      Date tsDate = ts.getDate();
79      assertEquals(refDate, tsDate);
80      }
81  
82  }