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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
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http://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.
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package org.apache.poi.hssf.usermodel;
import junit.framework.TestCase;
import java.util.Date;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.TimeZone;
/**
* Class TestHSSFDateUtil
*
*
* @author
* @author Dan Sherman (dsherman at isisph.com)
* @author Hack Kampbjorn (hak at 2mba.dk)
* @version %I%, %G%
*/
public class TestHSSFDateUtil
extends TestCase
{
public TestHSSFDateUtil(String s)
{
super(s);
}
/**
* Checks the date conversion functions in the HSSFDateUtil class.
*/
public void testDateConversion()
throws Exception
{
// Iteratating over the hours exposes any rounding issues.
for (int hour = 0; hour < 23; hour++)
{
GregorianCalendar date = new GregorianCalendar(2002, 0, 1,
hour, 1, 1);
double excelDate =
HSSFDateUtil.getExcelDate(date.getTime());
assertEquals("Checking hour = " + hour, date.getTime().getTime(),
HSSFDateUtil.getJavaDate(excelDate).getTime());
}
// check 1900 and 1904 date windowing conversions
double excelDate = 36526.0;
// with 1900 windowing, excelDate is Jan. 1, 2000
// with 1904 windowing, excelDate is Jan. 2, 2004
GregorianCalendar cal = new GregorianCalendar(2000,0,1); // Jan. 1, 2000
Date dateIf1900 = cal.getTime();
cal.add(GregorianCalendar.YEAR,4); // now Jan. 1, 2004
cal.add(GregorianCalendar.DATE,1); // now Jan. 2, 2004
Date dateIf1904 = cal.getTime();
// 1900 windowing
assertEquals("Checking 1900 Date Windowing",
dateIf1900.getTime(),
HSSFDateUtil.getJavaDate(excelDate,false).getTime());
// 1904 windowing
assertEquals("Checking 1904 Date Windowing",
dateIf1904.getTime(),
HSSFDateUtil.getJavaDate(excelDate,true).getTime());
}
/**
* Checks the conversion of a java.util.date to Excel on a day when
* Daylight Saving Time starts.
*/
public void testExcelConversionOnDSTStart() {
TimeZone cet = TimeZone.getTimeZone("Europe/Copenhagen");
TimeZone.setDefault(cet);
Calendar cal = new GregorianCalendar(2004, Calendar.MARCH, 28);
for (int hour = 0; hour < 24; hour++) {
// Skip 02:00 CET as that is the Daylight change time
// and Java converts it automatically to 03:00 CEST
if (hour == 2) {
continue;
}
cal.set(Calendar.HOUR_OF_DAY, hour);
Date javaDate = cal.getTime();
double excelDate = HSSFDateUtil.getExcelDate(javaDate);
double difference = excelDate - Math.floor(excelDate);
int differenceInHours = (int) (difference * 24 * 60 + 0.5) / 60;
assertEquals("Checking " + hour + " hour on Daylight Saving Time start date",
hour,
differenceInHours);
assertEquals("Checking " + hour + " hour on Daylight Saving Time start date",
javaDate.getTime(),
HSSFDateUtil.getJavaDate(excelDate).getTime());
}
}
/**
* Checks the conversion of an Excel date to a java.util.date on a day when
* Daylight Saving Time starts.
*/
public void testJavaConversionOnDSTStart() {
TimeZone cet = TimeZone.getTimeZone("Europe/Copenhagen");
TimeZone.setDefault(cet);
Calendar cal = new GregorianCalendar(2004, Calendar.MARCH, 28);
double excelDate = HSSFDateUtil.getExcelDate(cal.getTime());
double oneHour = 1.0 / 24;
double oneMinute = oneHour / 60;
for (int hour = 0; hour < 24; hour++, excelDate += oneHour) {
// Skip 02:00 CET as that is the Daylight change time
// and Java converts it automatically to 03:00 CEST
if (hour == 2) {
continue;
}
cal.set(Calendar.HOUR_OF_DAY, hour);
Date javaDate = HSSFDateUtil.getJavaDate(excelDate);
assertEquals("Checking " + hour + " hours on Daylight Saving Time start date",
excelDate,
HSSFDateUtil.getExcelDate(javaDate), oneMinute);
}
}
/**
* Checks the conversion of a java.util.Date to Excel on a day when
* Daylight Saving Time ends.
*/
public void testExcelConversionOnDSTEnd() {
TimeZone cet = TimeZone.getTimeZone("Europe/Copenhagen");
TimeZone.setDefault(cet);
Calendar cal = new GregorianCalendar(2004, Calendar.OCTOBER, 31);
for (int hour = 0; hour < 24; hour++) {
cal.set(Calendar.HOUR_OF_DAY, hour);
Date javaDate = cal.getTime();
double excelDate = HSSFDateUtil.getExcelDate(javaDate);
double difference = excelDate - Math.floor(excelDate);
int differenceInHours = (int) (difference * 24 * 60 + 0.5) / 60;
assertEquals("Checking " + hour + " hour on Daylight Saving Time end date",
hour,
differenceInHours);
assertEquals("Checking " + hour + " hour on Daylight Saving Time start date",
javaDate.getTime(),
HSSFDateUtil.getJavaDate(excelDate).getTime());
}
}
/**
* Checks the conversion of an Excel date to java.util.Date on a day when
* Daylight Saving Time ends.
*/
public void testJavaConversionOnDSTEnd() {
TimeZone cet = TimeZone.getTimeZone("Europe/Copenhagen");
TimeZone.setDefault(cet);
Calendar cal = new GregorianCalendar(2004, Calendar.OCTOBER, 31);
double excelDate = HSSFDateUtil.getExcelDate(cal.getTime());
double oneHour = 1.0 / 24;
double oneMinute = oneHour / 60;
for (int hour = 0; hour < 24; hour++, excelDate += oneHour) {
cal.set(Calendar.HOUR_OF_DAY, hour);
Date javaDate = HSSFDateUtil.getJavaDate(excelDate);
assertEquals("Checking " + hour + " hours on Daylight Saving Time start date",
excelDate,
HSSFDateUtil.getExcelDate(javaDate), oneMinute);
}
}
/**
* Tests that we correctly detect date formats as such
*/
public void testIdentifyDateFormats() {
// First up, try with a few built in date formats
short[] builtins = new short[] { 0x0e, 0x0f, 0x10, 0x16, 0x2d, 0x2e };
for(int i=0; i<builtins.length; i++) {
String formatStr = HSSFDataFormat.getBuiltinFormat(builtins[i]);
assertTrue( HSSFDateUtil.isInternalDateFormat(builtins[i]) );
assertTrue( HSSFDateUtil.isADateFormat(builtins[i],formatStr) );
}
// Now try a few built-in non date formats
builtins = new short[] { 0x01, 0x02, 0x17, 0x1f, 0x30 };
for(int i=0; i<builtins.length; i++) {
String formatStr = HSSFDataFormat.getBuiltinFormat(builtins[i]);
assertFalse( HSSFDateUtil.isInternalDateFormat(builtins[i]) );
assertFalse( HSSFDateUtil.isADateFormat(builtins[i],formatStr) );
}
// Now for some non-internal ones
// These come after the real ones
int numBuiltins = HSSFDataFormat.getNumberOfBuiltinBuiltinFormats();
assertTrue(numBuiltins < 60);
short formatId = 60;
assertFalse( HSSFDateUtil.isInternalDateFormat(formatId) );
// Valid ones first
String[] formats = new String[] {
"yyyy-mm-dd", "yyyy/mm/dd", "yy/mm/dd", "yy/mmm/dd",
"dd/mm/yy", "dd/mm/yyyy", "dd/mmm/yy",
"dd-mm-yy", "dd-mm-yyyy",
"dd\\-mm\\-yy", // Sometimes escaped
};
for(int i=0; i<formats.length; i++) {
assertTrue( HSSFDateUtil.isADateFormat(formatId, formats[i]) );
}
// Then invalid ones
formats = new String[] {
"yyyy:mm:dd",
"0.0", "0.000",
"0%", "0.0%",
"", null
};
for(int i=0; i<formats.length; i++) {
assertFalse( HSSFDateUtil.isADateFormat(formatId, formats[i]) );
}
}
public static void main(String [] args) {
System.out
.println("Testing org.apache.poi.hssf.usermodel.TestHSSFDateUtil");
junit.textui.TestRunner.run(TestHSSFDateUtil.class);
}
}
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