/**
* Fairfieldの公式の確認。
*
* @param pattern
* @param timeZone
* @param failsOnAssert
* @throws ParseException
*/
private void assertFairfieldDays(String pattern, TimeZone timeZone, boolean failsOnAssert)
throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
sdf.setTimeZone(timeZone);
SafeDateFormat safe = SafeDateFormat.getInstance(pattern, timeZone);
boolean passed = true;
StringBuilder failedDates = new StringBuilder();
String minYear = null;
String maxYear = null;
long ms = 0;
for (int i = -100000; i < 100000; i++) {
ms = 86400000L * i;
String date = sdf.format(new Date(ms));
long msDate = sdf.parse(date).getTime();
if (failsOnAssert) {
assertEquals(msDate, safe.parse(date));
assertEquals(date, safe.format(msDate));
}
if (msDate != safe.parse(date)) {
passed = false;
int diff = (int) (msDate - safe.parse(date)) / 1000;
failedDates.append('p').append(date).append('-').append(diff).append(',');
}
if (!date.equals(safe.format(msDate))) {
passed = false;
failedDates.append('f').append(date).append(',');
}
maxYear = date.substring(0, 4);
if (minYear == null) {
minYear = maxYear;
}
}
if (passed) {
System.out.printf(
"passed %s from %s year till %s year\n", timeZone.getID(), minYear, maxYear);
} else {
failedDates.setLength(failedDates.length() - 1);
System.out.printf("FAILED! %s %s\n", timeZone.getID(), failedDates.toString());
}
}
@Test
public void test() throws ParseException {
// Fairfieldの公式ベースの確認
for (String timeZoneId : TimeZone.getAvailableIDs()) {
if (timeZoneId.contains("/")) {
assertFairfieldDays("yyyyMMdd", TimeZone.getTimeZone(timeZoneId), false);
}
}
// TimeZone確認
for (String timeZoneId : new String[] {"UTC", "GMT+9", "JST", "America/New_York"}) {
String pattern = "yyyy/MM/dd-HH:mm:ss.SSS";
TimeZone timeZone = TimeZone.getTimeZone(timeZoneId);
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
sdf.setTimeZone(timeZone);
SafeDateFormat safe = SafeDateFormat.getInstance(pattern, timeZone);
String date = sdf.format(new Date());
long msDate = sdf.parse(date).getTime();
assertEquals(timeZoneId, msDate, safe.parse(date));
assertEquals(timeZoneId, date, safe.format(msDate));
}
}
private static String getDateStr() {
return safeDateFormat.format(System.currentTimeMillis());
}
@Benchmark
public void formatOfSafeDateFormat() {
safeDateFormat.format(System.currentTimeMillis());
}
