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package com.vaadin.client;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.junit.Assert;
import org.junit.Test;
public class DateTimeServiceTest {
final long MILLISECONDS_PER_DAY = 24 * 3600 * 1000;
static Map<Date, Integer> isoWeekNumbers = new HashMap<Date, Integer>();
static {
isoWeekNumbers.put(getDate(2005, 02, 02), 5);
isoWeekNumbers.put(getDate(2005, 1, 1), 53);
isoWeekNumbers.put(getDate(2005, 1, 2), 53);
isoWeekNumbers.put(getDate(2005, 1, 3), 1);
isoWeekNumbers.put(getDate(2005, 1, 4), 1);
isoWeekNumbers.put(getDate(2005, 1, 5), 1);
isoWeekNumbers.put(getDate(2005, 1, 6), 1);
isoWeekNumbers.put(getDate(2005, 1, 7), 1);
isoWeekNumbers.put(getDate(2005, 1, 8), 1);
isoWeekNumbers.put(getDate(2005, 1, 9), 1);
isoWeekNumbers.put(getDate(2005, 1, 10), 2);
isoWeekNumbers.put(getDate(2005, 12, 31), 52);
isoWeekNumbers.put(getDate(2005, 12, 30), 52);
isoWeekNumbers.put(getDate(2005, 12, 29), 52);
isoWeekNumbers.put(getDate(2005, 12, 28), 52);
isoWeekNumbers.put(getDate(2005, 12, 27), 52);
isoWeekNumbers.put(getDate(2005, 12, 26), 52);
isoWeekNumbers.put(getDate(2005, 12, 25), 51);
isoWeekNumbers.put(getDate(2007, 1, 1), 1);
isoWeekNumbers.put(getDate(2007, 12, 30), 52);
isoWeekNumbers.put(getDate(2007, 12, 31), 1);
isoWeekNumbers.put(getDate(2008, 1, 1), 1);
isoWeekNumbers.put(getDate(2008, 12, 28), 52);
isoWeekNumbers.put(getDate(2008, 12, 29), 1);
isoWeekNumbers.put(getDate(2008, 12, 30), 1);
isoWeekNumbers.put(getDate(2008, 12, 31), 1);
isoWeekNumbers.put(getDate(2009, 1, 1), 1);
isoWeekNumbers.put(getDate(2009, 12, 31), 53);
isoWeekNumbers.put(getDate(2010, 1, 1), 53);
isoWeekNumbers.put(getDate(2010, 1, 2), 53);
isoWeekNumbers.put(getDate(2010, 1, 3), 53);
isoWeekNumbers.put(getDate(2010, 1, 4), 1);
isoWeekNumbers.put(getDate(2010, 1, 5), 1);
isoWeekNumbers.put(getDate(2010, 10, 10), 40);
isoWeekNumbers.put(getDate(2015, 3, 24), 13);
isoWeekNumbers.put(getDate(2015, 3, 31), 14);
isoWeekNumbers.put(getDate(2015, 10, 13), 42);
isoWeekNumbers.put(getDate(2015, 10, 20), 43);
isoWeekNumbers.put(getDate(2015, 10, 27), 44);
isoWeekNumbers.put(getDate(2026, 3, 24), 13);
isoWeekNumbers.put(getDate(2026, 3, 31), 14);
isoWeekNumbers.put(getDate(2026, 10, 13), 42);
isoWeekNumbers.put(getDate(2026, 10, 20), 43);
isoWeekNumbers.put(getDate(2026, 10, 27), 44);
}
/**
* Test all dates from 1990-1992 + some more and see that {@link Calendar}
* calculates the ISO week number like we do.
*
*/
@Test
public void testISOWeekNumbers() {
Calendar c = Calendar.getInstance();
c.set(1990, 1, 1);
long start = c.getTimeInMillis();
for (int i = 0; i < 1000; i++) {
Date d = new Date(start + i * MILLISECONDS_PER_DAY);
int expected = getCalendarISOWeekNr(d);
int calculated = DateTimeService.getISOWeekNumber(d);
Assert.assertEquals(d + " should be week " + expected, expected,
calculated);
}
}
/**
* Verify that special cases are handled correctly by us (and
* {@link Calendar}).
*
*/
@Test
public void testSampleISOWeekNumbers() {
for (Date d : isoWeekNumbers.keySet()) {
// System.out.println("Sample: " + d);
int expected = isoWeekNumbers.get(d);
int calculated = DateTimeService.getISOWeekNumber(d);
Assert.assertEquals(d + " should be week " + expected
+ " (Java Calendar is wrong?)", expected,
getCalendarISOWeekNr(d));
Assert.assertEquals(d + " should be week " + expected, expected,
calculated);
}
}
private int getCalendarISOWeekNr(Date d) {
Calendar c = Calendar.getInstance();
c.setFirstDayOfWeek(Calendar.MONDAY);
c.setMinimalDaysInFirstWeek(4);
c.setTime(d);
return c.get(Calendar.WEEK_OF_YEAR);
}
private static Date getDate(int year, int month, int date) {
Calendar c = Calendar.getInstance();
c.clear();
c.set(year, month - 1, date);
return c.getTime();
}
}
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