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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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package org.apache.poi.hssf.usermodel;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
import junit.framework.TestCase;
import org.apache.poi.hssf.HSSFTestDataSamples;
import org.apache.poi.hssf.model.Workbook;
/**
* Class TestHSSFDateUtil
*
*
* @author Dan Sherman (dsherman at isisph.com)
* @author Hack Kampbjorn (hak at 2mba.dk)
* @author Pavel Krupets (pkrupets at palmtreebusiness dot com)
* @author Alex Jacoby (ajacoby at gmail.com)
* @version %I%, %G%
*/
public class TestHSSFDateUtil extends TestCase {
public static final int CALENDAR_JANUARY = 0;
public static final int CALENDAR_FEBRUARY = 1;
public static final int CALENDAR_MARCH = 2;
public static final int CALENDAR_APRIL = 3;
public static final int CALENDAR_JULY = 6;
public static final int CALENDAR_OCTOBER = 9;
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(), false);
assertEquals("Checking hour = " + hour, date.getTime().getTime(),
HSSFDateUtil.getJavaDate(excelDate, false).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, false);
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, false).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(), false);
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, false);
assertEquals("Checking " + hour + " hours on Daylight Saving Time start date",
excelDate,
HSSFDateUtil.getExcelDate(javaDate, false), 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, false);
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, false).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(), false);
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, false);
assertEquals("Checking " + hour + " hours on Daylight Saving Time start date",
excelDate,
HSSFDateUtil.getExcelDate(javaDate, false), oneMinute);
}
}
/**
* Tests that we deal with timezones properly
*/
public void testCalendarConversion() {
GregorianCalendar date = new GregorianCalendar(2002, 0, 1, 12, 1, 1);
Date expected = date.getTime();
double expectedExcel = HSSFDateUtil.getExcelDate(expected);
// Iteratating over the hours exposes any rounding issues.
for (int hour = -12; hour <= 12; hour++)
{
String id = "GMT" + (hour < 0 ? "" : "+") + hour + ":00";
date.setTimeZone(TimeZone.getTimeZone(id));
date.set(Calendar.HOUR_OF_DAY, 12);
double excelDate = HSSFDateUtil.getExcelDate(date, false);
Date javaDate = HSSFDateUtil.getJavaDate(excelDate);
// Should match despite timezone
assertEquals("Checking timezone " + id, expected.getTime(), javaDate.getTime());
}
}
/**
* 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", "DD-mm-YYYY",
"dd\\-mm\\-yy", // Sometimes escaped
// These crazy ones are valid
"yyyy-mm-dd;@", "yyyy/mm/dd;@",
"dd-mm-yy;@", "dd-mm-yyyy;@",
// These even crazier ones are also valid
// (who knows what they mean though...)
"[$-F800]dddd\\,\\ mmm\\ dd\\,\\ yyyy",
"[$-F900]ddd/mm/yyy",
// These ones specify colours, who knew that was allowed?
"[BLACK]dddd/mm/yy",
"[yeLLow]yyyy-mm-dd"
};
for(int i=0; i<formats.length; i++) {
assertTrue(
formats[i] + " is a date format",
HSSFDateUtil.isADateFormat(formatId, formats[i])
);
}
// Then time based ones too
formats = new String[] {
"yyyy-mm-dd hh:mm:ss", "yyyy/mm/dd HH:MM:SS",
"mm/dd HH:MM", "yy/mmm/dd SS",
"mm/dd HH:MM AM", "mm/dd HH:MM am",
"mm/dd HH:MM PM", "mm/dd HH:MM pm"
};
for(int i=0; i<formats.length; i++) {
assertTrue(
formats[i] + " is a datetime format",
HSSFDateUtil.isADateFormat(formatId, formats[i])
);
}
// Then invalid ones
formats = new String[] {
"yyyy*mm*dd",
"0.0", "0.000",
"0%", "0.0%",
"[]Foo", "[BLACK]0.00%",
"", null
};
for(int i=0; i<formats.length; i++) {
assertFalse(
formats[i] + " is not a date or datetime format",
HSSFDateUtil.isADateFormat(formatId, formats[i])
);
}
// And these are ones we probably shouldn't allow,
// but would need a better regexp
formats = new String[] {
"yyyy:mm:dd",
};
for(int i=0; i<formats.length; i++) {
// assertFalse( HSSFDateUtil.isADateFormat(formatId, formats[i]) );
}
}
/**
* Test that against a real, test file, we still do everything
* correctly
*/
public void testOnARealFile() throws Exception {
HSSFWorkbook workbook = HSSFTestDataSamples.openSampleWorkbook("DateFormats.xls");
HSSFSheet sheet = workbook.getSheetAt(0);
Workbook wb = workbook.getWorkbook();
HSSFRow row;
HSSFCell cell;
HSSFCellStyle style;
double aug_10_2007 = 39304.0;
// Should have dates in 2nd column
// All of them are the 10th of August
// 2 US dates, 3 UK dates
row = sheet.getRow(0);
cell = row.getCell((short)1);
style = cell.getCellStyle();
assertEquals(aug_10_2007, cell.getNumericCellValue(), 0.0001);
assertEquals("d-mmm-yy", style.getDataFormatString(wb));
assertTrue(HSSFDateUtil.isInternalDateFormat(style.getDataFormat()));
assertTrue(HSSFDateUtil.isADateFormat(style.getDataFormat(), style.getDataFormatString(wb)));
assertTrue(HSSFDateUtil.isCellDateFormatted(cell));
row = sheet.getRow(1);
cell = row.getCell((short)1);
style = cell.getCellStyle();
assertEquals(aug_10_2007, cell.getNumericCellValue(), 0.0001);
assertFalse(HSSFDateUtil.isInternalDateFormat(cell.getCellStyle().getDataFormat()));
assertTrue(HSSFDateUtil.isADateFormat(style.getDataFormat(), style.getDataFormatString(wb)));
assertTrue(HSSFDateUtil.isCellDateFormatted(cell));
row = sheet.getRow(2);
cell = row.getCell((short)1);
style = cell.getCellStyle();
assertEquals(aug_10_2007, cell.getNumericCellValue(), 0.0001);
assertTrue(HSSFDateUtil.isInternalDateFormat(cell.getCellStyle().getDataFormat()));
assertTrue(HSSFDateUtil.isADateFormat(style.getDataFormat(), style.getDataFormatString(wb)));
assertTrue(HSSFDateUtil.isCellDateFormatted(cell));
row = sheet.getRow(3);
cell = row.getCell((short)1);
style = cell.getCellStyle();
assertEquals(aug_10_2007, cell.getNumericCellValue(), 0.0001);
assertFalse(HSSFDateUtil.isInternalDateFormat(cell.getCellStyle().getDataFormat()));
assertTrue(HSSFDateUtil.isADateFormat(style.getDataFormat(), style.getDataFormatString(wb)));
assertTrue(HSSFDateUtil.isCellDateFormatted(cell));
row = sheet.getRow(4);
cell = row.getCell((short)1);
style = cell.getCellStyle();
assertEquals(aug_10_2007, cell.getNumericCellValue(), 0.0001);
assertFalse(HSSFDateUtil.isInternalDateFormat(cell.getCellStyle().getDataFormat()));
assertTrue(HSSFDateUtil.isADateFormat(style.getDataFormat(), style.getDataFormatString(wb)));
assertTrue(HSSFDateUtil.isCellDateFormatted(cell));
}
public void testDateBug_2Excel() {
assertEquals(59.0, HSSFDateUtil.getExcelDate(createDate(1900, CALENDAR_FEBRUARY, 28), false), 0.00001);
assertEquals(61.0, HSSFDateUtil.getExcelDate(createDate(1900, CALENDAR_MARCH, 1), false), 0.00001);
assertEquals(37315.00, HSSFDateUtil.getExcelDate(createDate(2002, CALENDAR_FEBRUARY, 28), false), 0.00001);
assertEquals(37316.00, HSSFDateUtil.getExcelDate(createDate(2002, CALENDAR_MARCH, 1), false), 0.00001);
assertEquals(37257.00, HSSFDateUtil.getExcelDate(createDate(2002, CALENDAR_JANUARY, 1), false), 0.00001);
assertEquals(38074.00, HSSFDateUtil.getExcelDate(createDate(2004, CALENDAR_MARCH, 28), false), 0.00001);
}
public void testDateBug_2Java() {
assertEquals(createDate(1900, CALENDAR_FEBRUARY, 28), HSSFDateUtil.getJavaDate(59.0, false));
assertEquals(createDate(1900, CALENDAR_MARCH, 1), HSSFDateUtil.getJavaDate(61.0, false));
assertEquals(createDate(2002, CALENDAR_FEBRUARY, 28), HSSFDateUtil.getJavaDate(37315.00, false));
assertEquals(createDate(2002, CALENDAR_MARCH, 1), HSSFDateUtil.getJavaDate(37316.00, false));
assertEquals(createDate(2002, CALENDAR_JANUARY, 1), HSSFDateUtil.getJavaDate(37257.00, false));
assertEquals(createDate(2004, CALENDAR_MARCH, 28), HSSFDateUtil.getJavaDate(38074.00, false));
}
public void testDate1904() {
assertEquals(createDate(1904, CALENDAR_JANUARY, 2), HSSFDateUtil.getJavaDate(1.0, true));
assertEquals(createDate(1904, CALENDAR_JANUARY, 1), HSSFDateUtil.getJavaDate(0.0, true));
assertEquals(0.0, HSSFDateUtil.getExcelDate(createDate(1904, CALENDAR_JANUARY, 1), true), 0.00001);
assertEquals(1.0, HSSFDateUtil.getExcelDate(createDate(1904, CALENDAR_JANUARY, 2), true), 0.00001);
assertEquals(createDate(1998, CALENDAR_JULY, 5), HSSFDateUtil.getJavaDate(35981, false));
assertEquals(createDate(1998, CALENDAR_JULY, 5), HSSFDateUtil.getJavaDate(34519, true));
assertEquals(35981.0, HSSFDateUtil.getExcelDate(createDate(1998, CALENDAR_JULY, 5), false), 0.00001);
assertEquals(34519.0, HSSFDateUtil.getExcelDate(createDate(1998, CALENDAR_JULY, 5), true), 0.00001);
}
private Date createDate(int year, int month, int day) {
Calendar c = new GregorianCalendar();
c.set(year, month, day, 0, 0, 0);
c.set(Calendar.MILLISECOND, 0);
return c.getTime();
}
/**
* Check if HSSFDateUtil.getAbsoluteDay works as advertised.
*/
public void testAbsoluteDay() {
// 1 Jan 1900 is 1 day after 31 Dec 1899
GregorianCalendar calendar = new GregorianCalendar(1900, 0, 1);
assertEquals("Checking absolute day (1 Jan 1900)", 1, HSSFDateUtil.absoluteDay(calendar, false));
// 1 Jan 1901 is 366 days after 31 Dec 1899
calendar = new GregorianCalendar(1901, 0, 1);
assertEquals("Checking absolute day (1 Jan 1901)", 366, HSSFDateUtil.absoluteDay(calendar, false));
}
public static void main(String [] args) {
System.out
.println("Testing org.apache.poi.hssf.usermodel.TestHSSFDateUtil");
junit.textui.TestRunner.run(TestHSSFDateUtil.class);
}
}