/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *      https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.net.ntp;
  
  import java.util.Calendar;
  import java.util.Date;
  import java.util.TimeZone;
  
  import junit.framework.TestCase;
  
  /**
   * Test class that validates assertions for the basic TimeStamp operations and comparisons.
   */
  public class TimeStampTest extends TestCase {
  
      private static final String TIME1 = "c1a9ae1c.cf6ac48d"; // Tue, Dec 17 2002 14:07:24.810 UTC
      private static final String TIME2 = "c1a9ae1c.cf6ac48f"; // Tue, Dec 17 2002 14:07:24.810 UTC
      private static final String TIME3 = "c1a9ae1d.cf6ac48e"; // Tue, Dec 17 2002 14:07:25.810 UTC
  
      public void testCompare() {
  
          final TimeStamp ts1 = new TimeStamp(TIME1); // Tue, Dec 17 2002 14:07:24.810 UTC
          final TimeStamp ts2 = new TimeStamp(TIME1);
          final TimeStamp ts3 = new TimeStamp(TIME2); // Tue, Dec 17 2002 14:07:24.810 UTC
          final TimeStamp ts4 = new TimeStamp(TIME3); // Tue, Dec 17 2002 14:07:25.810 UTC
  
          // do assertion tests on TimeStamp class
          assertEquals("equals(1,2)", ts1, ts2);
          assertEquals("compareTo(1,2)", 0, ts1.compareTo(ts2));
          assertEquals("ntpValue(1,2)", ts1.ntpValue(), ts2.ntpValue());
          assertEquals("hashCode(1,2)", ts1.hashCode(), ts2.hashCode());
          assertEquals("ts1==ts1", ts1, ts1);
  
          // timestamps in ts1 (TIME1) and ts3 (TIME2) are only off by the smallest
          // fraction of a second (~200 picoseconds) so the times are not equal but
          // when converted to Java dates (in milliseconds) they will be equal.
          assertFalse("ts1 != ts3", ts1.equals(ts3));
          assertEquals("compareTo(1,3)", -1, ts1.compareTo(ts3));
          assertEquals("seconds", ts1.getSeconds(), ts3.getSeconds());
          assertTrue("fraction", ts1.getFraction() != ts3.getFraction());
          assertTrue("ntpValue(1,3)", ts1.ntpValue() != ts3.ntpValue());
          assertTrue("hashCode(1,3)", ts1.hashCode() != ts3.hashCode());
          final long time1 = ts1.getTime();
          final long time3 = ts3.getTime();
          assertEquals("equals(time1,3)", time1, time3); // ntpTime1 != ntpTime3 but JavaTime(t1) == JavaTime(t3)...
  
          assertFalse("ts3 != ts4", ts3.equals(ts4));
          assertTrue("time3 != ts4.time", time3 != ts4.getTime());
      }
  
      public void testDateConversion() {
          // convert current date to NtpTimeStamp then compare Java date
          // computed from NTP timestamp with original Java date.
          final Calendar refCal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
          final Date refDate = refCal.getTime();
          final TimeStamp ts = new TimeStamp(refDate);
          assertEquals("refDate.getTime()", refDate.getTime(), ts.getTime());
          final Date tsDate = ts.getDate();
          assertEquals(refDate, tsDate);
      }
  
      public void testNotSame() {
          final TimeStamp time = TimeStamp.getCurrentTime();
          Object other = Integer.valueOf(0);
          if (time.equals(other)) {
              fail("TimeStamp cannot equal Date");
          }
          other = null;
          if (time.equals(other)) {
              fail("TimeStamp cannot equal null");
          }
      }
  
      public void testUTCString() {
          final TimeStamp ts1 = new TimeStamp(TIME1); // Tue, Dec 17 2002 14:07:24.810 UTC
          final String actual = ts1.toUTCString();
          assertEquals("Tue, Dec 17 2002 14:07:24.810 UTC", actual);
      }
  
  }