TestDateUtil.java
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this work for additional information regarding copyright ownership.
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package org.apache.poi.ss.usermodel;
import static java.util.Calendar.AUGUST;
import static java.util.Calendar.FEBRUARY;
import static java.util.Calendar.JANUARY;
import static java.util.Calendar.JULY;
import static java.util.Calendar.MARCH;
import static java.util.Calendar.MAY;
import static java.util.Calendar.OCTOBER;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.util.LocaleUtil;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
class TestDateUtil {
static TimeZone userTimeZone;
@BeforeAll
public static void setCEST() {
userTimeZone = LocaleUtil.getUserTimeZone();
LocaleUtil.setUserTimeZone(TimeZone.getTimeZone("CEST"));
}
@AfterAll
public static void resetTimeZone() {
LocaleUtil.setUserTimeZone(userTimeZone);
}
@Test
void getJavaDate_InvalidValue() {
final double dateValue = -1;
final TimeZone tz = LocaleUtil.getUserTimeZone();
final boolean use1904windowing = false;
final boolean roundSeconds = false;
assertNull(DateUtil.getJavaDate(dateValue));
assertNull(DateUtil.getJavaDate(dateValue, tz));
assertNull(DateUtil.getJavaDate(dateValue, use1904windowing));
assertNull(DateUtil.getJavaDate(dateValue, use1904windowing, tz));
assertNull(DateUtil.getJavaDate(dateValue, use1904windowing, tz, roundSeconds));
}
@Test
void getJavaDate_ValidValue() {
final double dateValue = 0;
final TimeZone tz = LocaleUtil.getUserTimeZone();
final boolean use1904windowing = false;
final boolean roundSeconds = false;
Calendar calendar = LocaleUtil.getLocaleCalendar(1900, 0, 0);
Date date = calendar.getTime();
assertEquals(date, DateUtil.getJavaDate(dateValue));
assertEquals(date, DateUtil.getJavaDate(dateValue, tz));
assertEquals(date, DateUtil.getJavaDate(dateValue, use1904windowing));
assertEquals(date, DateUtil.getJavaDate(dateValue, use1904windowing, tz));
assertEquals(date, DateUtil.getJavaDate(dateValue, use1904windowing, tz, roundSeconds));
}
@Test
void getJavaCalendar_InvalidValue() {
final double dateValue = -1;
final TimeZone tz = LocaleUtil.getUserTimeZone();
final boolean use1904windowing = false;
final boolean roundSeconds = false;
assertNull(DateUtil.getJavaCalendar(dateValue));
assertNull(DateUtil.getJavaCalendar(dateValue, use1904windowing));
assertNull(DateUtil.getJavaCalendar(dateValue, use1904windowing, tz));
assertNull(DateUtil.getJavaCalendar(dateValue, use1904windowing, tz, roundSeconds));
}
@Test
void getJavaCalendar_ValidValue() {
final double dateValue = 0;
final TimeZone tz = LocaleUtil.getUserTimeZone();
final boolean use1904windowing = false;
final boolean roundSeconds = false;
Calendar expCal = LocaleUtil.getLocaleCalendar(1900, 0, 0);
Calendar[] actCal = {
DateUtil.getJavaCalendar(dateValue),
DateUtil.getJavaCalendar(dateValue, use1904windowing),
DateUtil.getJavaCalendar(dateValue, use1904windowing, tz),
DateUtil.getJavaCalendar(dateValue, use1904windowing, tz, roundSeconds)
};
assertEquals(expCal, actCal[0]);
assertEquals(expCal, actCal[1]);
assertEquals(expCal, actCal[2]);
assertEquals(expCal, actCal[3]);
}
@Test
void getLocalDateTime_InvalidValue() {
final double dateValue = -1;
final boolean use1904windowing = false;
final boolean roundSeconds = false;
assertNull(DateUtil.getLocalDateTime(dateValue));
assertNull(DateUtil.getLocalDateTime(dateValue, use1904windowing));
assertNull(DateUtil.getLocalDateTime(dateValue, use1904windowing, roundSeconds));
}
@Test
void getLocalDateTime_ValidValue() {
final double dateValue = 0;
final boolean use1904windowing = false;
final boolean roundSeconds = false;
// note that the Date and Calendar examples use a zero day of month which is invalid in LocalDateTime
LocalDateTime date = LocalDateTime.of(1899, 12, 31, 0, 0);
assertEquals(date, DateUtil.getLocalDateTime(dateValue));
assertEquals(date, DateUtil.getLocalDateTime(dateValue, use1904windowing));
assertEquals(date, DateUtil.getLocalDateTime(dateValue, use1904windowing, roundSeconds));
}
@Test
void isADateFormat() {
// Cell content 2016-12-8 as an example
// Cell show "12/8/2016"
assertTrue(DateUtil.isADateFormat(14, "m/d/yy"));
// Cell show "Thursday, December 8, 2016"
assertTrue(DateUtil.isADateFormat(182, "[$-F800]dddd\\,\\ mmmm\\ dd\\,\\ yyyy"));
// Cell show "12/8"
assertTrue(DateUtil.isADateFormat(183, "m/d;@"));
// Cell show "12/08/16"
assertTrue(DateUtil.isADateFormat(184, "mm/dd/yy;@"));
// Cell show "8-Dec-16"
assertTrue(DateUtil.isADateFormat(185, "[$-409]d\\-mmm\\-yy;@"));
// Cell show "D-16"
assertTrue(DateUtil.isADateFormat(186, "[$-409]mmmmm\\-yy;@"));
// Cell show "2016���12���8���"
assertTrue(DateUtil.isADateFormat(165, "yyyy\"\u5e74\"m\"\u6708\"d\"\u65e5\";@"));
// Cell show "2016���12���"
assertTrue(DateUtil.isADateFormat(164, "yyyy\"\u5e74\"m\"\u6708\";@"));
// Cell show "12���8���"
assertTrue(DateUtil.isADateFormat(168, "m\"\u6708\"d\"\u65e5\";@"));
// Cell show "���������������"
assertTrue(DateUtil.isADateFormat(181, "[DBNum1][$-404]m\"\u6708\"d\"\u65e5\";@"));
// Cell show "���������������������������������"
assertTrue(DateUtil.isADateFormat(177, "[DBNum2][$-804]yyyy\"\u5e74\"m\"\u6708\"d\"\u65e5\";@"));
// Cell show "������������������������������"
assertTrue(DateUtil.isADateFormat(178, "[DBNum3][$-804]yyyy\"\u5e74\"m\"\u6708\"d\"\u65e5\";@"));
}
/**
* Checks the date conversion functions in the DateUtil class.
*/
@Test
void dateConversion() {
// Iterating over the hours exposes any rounding issues.
Calendar cal = LocaleUtil.getLocaleCalendar(2002, JANUARY, 1, 0, 1, 1);
for (int hour = 0; hour < 24; hour++) {
double excelDate = DateUtil.getExcelDate(cal.getTime(), false);
assertEquals(cal.getTime().getTime(), DateUtil.getJavaDate(excelDate, false).getTime(),
"getJavaDate: Checking hour = " + hour);
LocalDateTime ldt = LocalDateTime.ofInstant(cal.toInstant(), cal.getTimeZone().toZoneId());
assertEquals(ldt, DateUtil.getLocalDateTime(excelDate, false),
"getLocalDateTime: Checking hour = " + hour);
cal.add(Calendar.HOUR_OF_DAY, 1);
}
// 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
cal.set(2000, JANUARY, 1, 0, 0, 0); // Jan. 1, 2000
Date dateIf1900 = cal.getTime();
cal.add(Calendar.YEAR, 4); // now Jan. 1, 2004
cal.add(Calendar.DATE, 1); // now Jan. 2, 2004
Date dateIf1904 = cal.getTime();
// 1900 windowing
assertEquals(dateIf1900.getTime(), DateUtil.getJavaDate(excelDate, false).getTime(),
"Checking 1900 Date Windowing");
// 1904 windowing
assertEquals(dateIf1904.getTime(), DateUtil.getJavaDate(excelDate, true).getTime(),
"Checking 1904 Date Windowing");
// 1900 windowing (LocalDateTime)
assertEquals(LocalDateTime.of(2000, 1, 1, 0, 0), DateUtil.getLocalDateTime(excelDate, false),
"Checking 1900 Date Windowing");
// 1904 windowing (LocalDateTime)
assertEquals(LocalDateTime.of(2004, 1, 2, 0, 0), DateUtil.getLocalDateTime(excelDate, true),
"Checking 1904 Date Windowing");
}
/**
* Checks the conversion of a java.util.date to Excel on a day when
* Daylight Saving Time starts.
*/
@Test
void excelConversionOnDSTStart() {
Calendar cal = LocaleUtil.getLocaleCalendar(2004, MARCH, 28, 0, 0, 0);
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 = DateUtil.getExcelDate(javaDate, false);
double difference = excelDate - Math.floor(excelDate);
int differenceInHours = (int) (difference * 24 * 60 + 0.5) / 60;
assertEquals(hour, differenceInHours, "Checking " + hour + " hour on Daylight Saving Time start date");
assertEquals(javaDate.getTime(), DateUtil.getJavaDate(excelDate, false).getTime(),
"Checking " + hour + " hour on Daylight Saving Time start date");
// perform the same checks with LocalDateTime
LocalDateTime localDate = LocalDateTime.of(2004, 3, 28, hour, 0, 0);
double excelLocalDate = DateUtil.getExcelDate(localDate, false);
double differenceLocalDate = excelLocalDate - Math.floor(excelLocalDate);
int differenceLocalDateInHours = (int) (differenceLocalDate * 24 * 60 + 0.5) / 60;
assertEquals(hour, differenceLocalDateInHours,
"Checking " + hour + " hour on Daylight Saving Time start date (LocalDateTime)");
assertEquals(localDate, DateUtil.getLocalDateTime(excelLocalDate, false),
"Checking " + hour + " hour on Daylight Saving Time start date (LocalDateTime)");
}
}
/**
* Checks the conversion of an Excel date to a java.util.date on a day when
* Daylight Saving Time starts.
*/
@Test
void javaConversionOnDSTStart() {
Calendar cal = LocaleUtil.getLocaleCalendar(2004, MARCH, 28, 0, 0, 0);
double excelDate = DateUtil.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 = DateUtil.getJavaDate(excelDate, false);
double actDate = DateUtil.getExcelDate(javaDate, false);
assertEquals(excelDate, actDate, oneMinute,
"Checking " + hour + " hours on Daylight Saving Time start date");
// perform the same check with LocalDateTime
cal.set(Calendar.HOUR_OF_DAY, hour);
LocalDateTime localDate = DateUtil.getLocalDateTime(excelDate, false);
double actLocalDate = DateUtil.getExcelDate(localDate, false);
assertEquals(excelDate, actLocalDate, oneMinute,
"Checking " + hour + " hours on Daylight Saving Time start date (LocalDateTime)");
}
}
/**
* Checks the conversion of a java.util.Date to Excel on a day when
* Daylight Saving Time ends.
*/
@Test
void excelConversionOnDSTEnd() {
Calendar cal = LocaleUtil.getLocaleCalendar(2004, OCTOBER, 31, 0, 0, 0);
for (int hour = 0; hour < 24; hour++) {
cal.set(Calendar.HOUR_OF_DAY, hour);
Date javaDate = cal.getTime();
double excelDate = DateUtil.getExcelDate(javaDate, false);
double difference = excelDate - Math.floor(excelDate);
int differenceInHours = (int) (difference * 24 * 60 + 0.5) / 60;
assertEquals(hour, differenceInHours,
"Checking " + hour + " hour on Daylight Saving Time end date");
assertEquals(javaDate.getTime(), DateUtil.getJavaDate(excelDate, false).getTime(),
"Checking " + hour + " hour on Daylight Saving Time start date");
// perform the same checks using LocalDateTime
LocalDateTime localDate = LocalDateTime.of(2004, 10, 31, hour, 0, 0);
double excelLocalDate = DateUtil.getExcelDate(localDate, false);
int differenceLocalDateInHours = (int) (difference * 24 * 60 + 0.5) / 60;
assertEquals(hour, differenceLocalDateInHours,
"Checking " + hour + " hour on Daylight Saving Time end date (LocalDateTime)");
assertEquals(localDate, DateUtil.getLocalDateTime(excelLocalDate, false),
"Checking " + hour + " hour on Daylight Saving Time start date (LocalDateTime)");
}
}
/**
* Checks the conversion of an Excel date to java.util.Date on a day when
* Daylight Saving Time ends.
*/
@Test
void javaConversionOnDSTEnd() {
Calendar cal = LocaleUtil.getLocaleCalendar(2004, OCTOBER, 31, 0, 0, 0);
double excelDate = DateUtil.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 = DateUtil.getJavaDate(excelDate, false);
assertEquals(excelDate, DateUtil.getExcelDate(javaDate, false), oneMinute,
"Checking " + hour + " hours on Daylight Saving Time start date");
// perform the same checks using LocalDateTime
LocalDateTime localDate = DateUtil.getLocalDateTime(excelDate, false);
assertEquals(excelDate, DateUtil.getExcelDate(localDate, false), oneMinute,
"Checking " + hour + " hours on Daylight Saving Time start date");
}
}
/**
* Tests that we deal with time-zones properly
*/
@Test
void calendarConversion() {
TimeZone userTZ = LocaleUtil.getUserTimeZone();
LocaleUtil.setUserTimeZone(TimeZone.getTimeZone("CET"));
try {
Calendar cal = LocaleUtil.getLocaleCalendar(2002, JANUARY, 1, 12, 1, 1);
Date expected = cal.getTime();
// Iterating over the hours exposes any rounding issues.
for (int hour = -12; hour <= 12; hour++) {
String id = "GMT" + (hour < 0 ? "" : "+") + hour + ":00";
cal.setTimeZone(TimeZone.getTimeZone(id));
cal.set(Calendar.HOUR_OF_DAY, 12);
double excelDate = DateUtil.getExcelDate(cal, false);
Date javaDate = DateUtil.getJavaDate(excelDate);
// Should match despite time-zone
assertEquals(expected.getTime(), javaDate.getTime(), "Checking timezone " + id);
}
// Check that the timezone aware getter works correctly
TimeZone cet = TimeZone.getTimeZone("Europe/Copenhagen");
TimeZone ldn = TimeZone.getTimeZone("Europe/London");
// 12:45 on 27th April 2012
double excelDate = 41026.53125;
// Same, no change
assertEquals(
DateUtil.getJavaDate(excelDate, false).getTime(),
DateUtil.getJavaDate(excelDate, false, cet).getTime()
);
// London vs Copenhagen, should differ by an hour
Date cetDate = DateUtil.getJavaDate(excelDate, false);
Date ldnDate = DateUtil.getJavaDate(excelDate, false, ldn);
assertEquals(ldnDate.getTime() - cetDate.getTime(), 60 * 60 * 1000);
} finally {
LocaleUtil.setUserTimeZone(userTZ);
}
}
/**
* Tests that we correctly detect date formats as such
*/
@Test
void identifyDateFormats() {
// First up, try with a few built in date formats
short[] builtins = new short[]{0x0e, 0x0f, 0x10, 0x16, 0x2d, 0x2e};
for (short builtin : builtins) {
String formatStr = HSSFDataFormat.getBuiltinFormat(builtin);
assertTrue(DateUtil.isInternalDateFormat(builtin));
assertTrue(DateUtil.isADateFormat(builtin, formatStr));
}
// Now try a few built-in non date formats
builtins = new short[]{0x01, 0x02, 0x17, 0x1f, 0x30};
for (short builtin : builtins) {
String formatStr = HSSFDataFormat.getBuiltinFormat(builtin);
assertFalse(DateUtil.isInternalDateFormat(builtin));
assertFalse(DateUtil.isADateFormat(builtin, formatStr));
}
// Now for some non-internal ones
// These come after the real ones
int numBuiltins = HSSFDataFormat.getNumberOfBuiltinBuiltinFormats();
assertTrue(numBuiltins < 60);
short formatId = 60;
assertFalse(DateUtil.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
"dd.mm.yyyy", "dd\\.mm\\.yyyy",
"dd\\ mm\\.yyyy AM", "dd\\ mm\\.yyyy pm",
"dd\\ mm\\.yyyy\\-dd", "[h]:mm:ss",
"mm/dd/yy", "\"mm\"/\"dd\"/\"yy\"",
"m\\/d\\/yyyy",
// 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 (String format : formats) {
assertTrue(DateUtil.isADateFormat(formatId, format), format + " is a date format");
}
// 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",
"m/d/yy h:mm AM/PM",
"hh:mm:ss", "hh:mm:ss.0", "mm:ss.0",
//support elapsed time [h],[m],[s]
"[hh]", "[mm]", "[ss]", "[SS]", "[red][hh]"
};
for (String format : formats) {
assertTrue(DateUtil.isADateFormat(formatId, format), format + " is a datetime format");
}
// Then invalid ones
formats = new String[]{
"yyyy*mm*dd",
"0.0", "0.000",
"0%", "0.0%",
"[]Foo", "[BLACK]0.00%",
"[ms]", "[Mh]",
"", null
};
for (String format : formats) {
assertFalse(DateUtil.isADateFormat(formatId, format), format + " is not a date or datetime format");
}
// And these are ones we probably shouldn't allow,
// but would need a better regexp
// formats = new String[] {
// "yyyy:mm:dd",
// };
// for (String format : formats) {
// assertFalse( DateUtil.isADateFormat(formatId, format) );
// }
}
@Test
void excelDateBorderCases() throws ParseException {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd", Locale.ROOT);
df.setTimeZone(LocaleUtil.getUserTimeZone());
Date date1 = df.parse("1900-01-01");
assertEquals(1.0, DateUtil.getExcelDate(date1), 0.00001);
assertEquals(1.0, DateUtil.getExcelDate(DateUtil.toLocalDateTime(date1)), 0.00001);
Date date31 = df.parse("1900-01-31");
assertEquals(31.0, DateUtil.getExcelDate(date31), 0.00001);
assertEquals(31.0, DateUtil.getExcelDate(DateUtil.toLocalDateTime(date31)), 0.00001);
Date date32 = df.parse("1900-02-01");
assertEquals(32.0, DateUtil.getExcelDate(date32), 0.00001);
assertEquals(32.0, DateUtil.getExcelDate(DateUtil.toLocalDateTime(date32)), 0.00001);
Date dateMinus1 = df.parse("1899-12-30");
assertEquals(/* BAD_DATE! */ -1.0, DateUtil.getExcelDate(dateMinus1), 0.00001);
assertEquals(/* BAD_DATE! */ -1.0, DateUtil.getExcelDate(DateUtil.toLocalDateTime(dateMinus1)), 0.00001);
}
@Test
void dateBug_2Excel() {
assertEquals(59.0, DateUtil.getExcelDate(createDate(1900, FEBRUARY, 28), false), 0.00001);
assertEquals(61.0, DateUtil.getExcelDate(createDate(1900, MARCH, 1), false), 0.00001);
assertEquals(37315.00, DateUtil.getExcelDate(createDate(2002, FEBRUARY, 28), false), 0.00001);
assertEquals(37316.00, DateUtil.getExcelDate(createDate(2002, MARCH, 1), false), 0.00001);
assertEquals(37257.00, DateUtil.getExcelDate(createDate(2002, JANUARY, 1), false), 0.00001);
assertEquals(38074.00, DateUtil.getExcelDate(createDate(2004, MARCH, 28), false), 0.00001);
// perform the same checks using LocalDateTime
assertEquals(59.0, DateUtil.getExcelDate(LocalDateTime.of(1900, 2, 28, 0, 0), false), 0.00001);
assertEquals(61.0, DateUtil.getExcelDate(LocalDateTime.of(1900, 3, 1, 0, 0), false), 0.00001);
assertEquals(37315.00, DateUtil.getExcelDate(LocalDateTime.of(2002, 2, 28, 0, 0), false), 0.00001);
assertEquals(37316.00, DateUtil.getExcelDate(LocalDateTime.of(2002, 3, 1, 0, 0), false), 0.00001);
assertEquals(37257.00, DateUtil.getExcelDate(LocalDateTime.of(2002, 1, 1, 0, 0), false), 0.00001);
assertEquals(38074.00, DateUtil.getExcelDate(LocalDateTime.of(2004, 3, 28, 0, 0), false), 0.00001);
}
@Test
void dateBug_2Java() {
assertEquals(createDate(1900, FEBRUARY, 28), DateUtil.getJavaDate(59.0, false));
assertEquals(createDate(1900, MARCH, 1), DateUtil.getJavaDate(61.0, false));
assertEquals(createDate(2002, FEBRUARY, 28), DateUtil.getJavaDate(37315.00, false));
assertEquals(createDate(2002, MARCH, 1), DateUtil.getJavaDate(37316.00, false));
assertEquals(createDate(2002, JANUARY, 1), DateUtil.getJavaDate(37257.00, false));
assertEquals(createDate(2004, MARCH, 28), DateUtil.getJavaDate(38074.00, false));
// perform the same checks using LocalDateTime
assertEquals(LocalDateTime.of(1900, 2, 28, 0, 0), DateUtil.getLocalDateTime(59.0, false));
assertEquals(LocalDateTime.of(1900, 3, 1, 0, 0), DateUtil.getLocalDateTime(61.0, false));
assertEquals(LocalDateTime.of(2002, 2, 28, 0, 0), DateUtil.getLocalDateTime(37315.00, false));
assertEquals(LocalDateTime.of(2002, 3, 1, 0, 0), DateUtil.getLocalDateTime(37316.00, false));
assertEquals(LocalDateTime.of(2002, 1, 1, 0, 0), DateUtil.getLocalDateTime(37257.00, false));
assertEquals(LocalDateTime.of(2004, 3, 28, 0, 0), DateUtil.getLocalDateTime(38074.00, false));
}
@Test
void date1904() {
assertEquals(createDate(1904, JANUARY, 2), DateUtil.getJavaDate(1.0, true));
assertEquals(createDate(1904, JANUARY, 1), DateUtil.getJavaDate(0.0, true));
assertEquals(0.0, DateUtil.getExcelDate(createDate(1904, JANUARY, 1), true), 0.00001);
assertEquals(1.0, DateUtil.getExcelDate(createDate(1904, JANUARY, 2), true), 0.00001);
assertEquals(createDate(1998, JULY, 5), DateUtil.getJavaDate(35981, false));
assertEquals(createDate(1998, JULY, 5), DateUtil.getJavaDate(34519, true));
assertEquals(35981.0, DateUtil.getExcelDate(createDate(1998, JULY, 5), false), 0.00001);
assertEquals(34519.0, DateUtil.getExcelDate(createDate(1998, JULY, 5), true), 0.00001);
// perform the same checks using LocalDateTime
assertEquals(LocalDateTime.of(1904, 1, 2, 0, 0), DateUtil.getLocalDateTime(1.0, true));
assertEquals(LocalDateTime.of(1904, 1, 1, 0, 0), DateUtil.getLocalDateTime(0.0, true));
assertEquals(0.0, DateUtil.getExcelDate(LocalDateTime.of(1904, 1, 1, 0, 0), true), 0.00001);
assertEquals(1.0, DateUtil.getExcelDate(LocalDateTime.of(1904, 1, 2, 0, 0), true), 0.00001);
assertEquals(LocalDateTime.of(1998, 7, 5, 0, 0), DateUtil.getLocalDateTime(35981, false));
assertEquals(LocalDateTime.of(1998, 7, 5, 0, 0), DateUtil.getLocalDateTime(34519, true));
assertEquals(35981.0, DateUtil.getExcelDate(LocalDateTime.of(1998, 7, 5, 0, 0), false), 0.00001);
assertEquals(34519.0, DateUtil.getExcelDate(LocalDateTime.of(1998, 7, 5, 0, 0), true), 0.00001);
}
/**
* @param month zero based
* @param day one based
*/
private static Date createDate(int year, int month, int day) {
return createDate(year, month, day, 0, 0);
}
/**
* @param month zero based
* @param day one based
*/
private static Date createDate(int year, int month, int day, int hour, int minute) {
Calendar c = LocaleUtil.getLocaleCalendar(year, month, day, hour, minute, 0);
return c.getTime();
}
/**
* Check if DateUtil.getAbsoluteDay works as advertised.
*/
@Test
void absoluteDay() {
// 1 Jan 1900 is 1 day after 31 Dec 1899
Calendar cal = LocaleUtil.getLocaleCalendar(1900, JANUARY, 1, 0, 0, 0);
assertEquals(1, DateUtil.absoluteDay(cal, false), "Checking absolute day (1 Jan 1900)");
LocalDateTime ldt = LocalDateTime.of(1900, 1, 1, 0, 0, 0);
assertEquals(1, DateUtil.absoluteDay(ldt, false), "Checking absolute day (1 Jan 1900) (LocalDateTime)");
// 1 Jan 1901 is 366 days after 31 Dec 1899
ldt = LocalDateTime.of(1901, 1, 1, 0, 0, 0);
cal.set(1901, JANUARY, 1, 0, 0, 0);
assertEquals(366, DateUtil.absoluteDay(ldt, false), "Checking absolute day (1 Jan 1901) (LocalDateTime)");
}
@Test
void absoluteDayYearTooLow() {
Calendar cal = LocaleUtil.getLocaleCalendar(1899, JANUARY, 1, 0, 0, 0);
assertThrows(IllegalArgumentException.class, () -> DateUtil.absoluteDay(cal, false));
cal.set(1903, JANUARY, 1, 0, 0, 0);
assertThrows(IllegalArgumentException.class, () -> DateUtil.absoluteDay(cal, true));
// same for LocalDateTime
assertThrows(IllegalArgumentException.class, () -> DateUtil.absoluteDay(LocalDateTime.of(1899, 1, 1, 0, 0, 0), false));
assertThrows(IllegalArgumentException.class, () -> DateUtil.absoluteDay(LocalDateTime.of(1903, 1, 1, 0, 0, 0), true));
}
@Test
void convertTime() {
final double delta = 1E-7; // a couple of digits more accuracy than strictly required
assertEquals(0.5, DateUtil.convertTime("12:00"), delta);
assertEquals(2.0 / 3, DateUtil.convertTime("16:00"), delta);
assertEquals(0.0000116, DateUtil.convertTime("0:00:01"), delta);
assertEquals(0.7330440, DateUtil.convertTime("17:35:35"), delta);
}
@Test
void parseDate() {
assertEquals(createDate(2008, AUGUST, 3), DateUtil.parseYYYYMMDDDate("2008/08/03"));
assertEquals(createDate(1994, MAY, 1), DateUtil.parseYYYYMMDDDate("1994/05/01"));
}
/**
* Ensure that date values *with* a fractional portion get the right time of day
*/
@Test
void convertDateTime() {
// Excel day 30000 is date 18-Feb-1982
// 0.7 corresponds to time 16:48:00
Date actual = DateUtil.getJavaDate(30000.7);
Date expected = createDate(1982, 1, 18, 16, 48);
assertEquals(expected, actual);
// note that months in Calendar are zero-based, in LocalDateTime one-based
LocalDateTime actualLocalDate = DateUtil.getLocalDateTime(30000.7);
LocalDateTime expectedLocalDate = LocalDateTime.of(1982, 2, 18, 16, 48, 0);
assertEquals(expectedLocalDate, actualLocalDate);
}
/**
* User reported a datetime issue in POI-2.5:
* Setting Cell's value to Jan 1, 1900 without a time doesn't return the same value set to
*/
@Test
void bug19172() throws IOException {
try (HSSFWorkbook workbook = new HSSFWorkbook()) {
HSSFSheet sheet = workbook.createSheet();
HSSFCell cell = sheet.createRow(0).createCell(0);
// A pseudo special Excel dates
Calendar cal = LocaleUtil.getLocaleCalendar(1900, JANUARY, 1);
Date valueToTest = cal.getTime();
cell.setCellValue(valueToTest);
Date returnedValue = cell.getDateCellValue();
assertEquals(valueToTest.getTime(), returnedValue.getTime());
}
}
/**
* DateUtil.isCellFormatted(Cell) should not true for a numeric cell
* that's formatted as ".0000"
*/
@Test
void bug54557() {
final String format = ".0000";
boolean isDateFormat = DateUtil.isADateFormat(165, format);
assertFalse(isDateFormat);
}
@Test
void bug56269() {
double excelFraction = 41642.45833321759d;
Calendar calNoRound = DateUtil.getJavaCalendar(excelFraction, false);
assertEquals(10, calNoRound.get(Calendar.HOUR));
assertEquals(59, calNoRound.get(Calendar.MINUTE));
assertEquals(59, calNoRound.get(Calendar.SECOND));
Calendar calRound = DateUtil.getJavaCalendar(excelFraction, false, null, true);
assertNotNull(calRound);
assertEquals(11, calRound.get(Calendar.HOUR));
assertEquals(0, calRound.get(Calendar.MINUTE));
assertEquals(0, calRound.get(Calendar.SECOND));
LocalDateTime ldtNoRound = DateUtil.getLocalDateTime(excelFraction, false);
assertEquals(10, ldtNoRound.getHour());
assertEquals(59, ldtNoRound.getMinute());
assertEquals(59, ldtNoRound.getSecond());
LocalDateTime ldtRound = DateUtil.getLocalDateTime(excelFraction, false, true);
assertNotNull(ldtRound);
assertEquals(11, ldtRound.getHour());
assertEquals(0, ldtRound.getMinute());
assertEquals(0, ldtRound.getSecond());
}
@Test
void timeOnly() {
final double d = 22.0 / 24.0; // 22:00 (10pm)
final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ", LocaleUtil.getUserLocale());
sdf.setTimeZone(LocaleUtil.getUserTimeZone());
final Date date = DateUtil.getJavaDate(d, false);
assertEquals("1899-12-31T22:00:00.000+0000", sdf.format(date));
final Date date1904 = DateUtil.getJavaDate(d, true);
assertEquals("1904-01-01T22:00:00.000+0000", sdf.format(date1904));
final double d0 = DateUtil.getExcelDate(date, false);
assertEquals(d, d0);
final double d1 = DateUtil.getExcelDate(date1904, true);
assertEquals(d, d1, 1E-10);
}
}