--- /dev/null 2016-05-17 12:01:17.473251102 +0900 +++ new/test/java/util/Calendar/CalendarLimitTest.java 2016-05-26 10:32:39.291292540 +0900 @@ -0,0 +1,202 @@ +/* + * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/** + * @test + * @bug 4033662 + * @library /java/text/testlib + * @summary test for limit on Calendar + * @run main CalendarLimitTest -verbose + */ + +import java.util.*; +import java.text.*; + +/** + * This test verifies the behavior of Calendar around the very earliest limits + * which it can handle. It also verifies the behavior for large values of millis. + * + * Note: There used to be a limit, due to a bug, for early times. There is + * currently no limit. + * + * March 17, 1998: Added code to make sure big + dates are big + AD years, and + * big - dates are big + BC years. + */ +public class CalendarLimitTest extends IntlTest +{ + // This number determined empirically; this is the old limit, + // which we test for to make sure it isn't there anymore. + static final long EARLIEST_SUPPORTED_MILLIS = -210993120000000L; + + static final int EPOCH_JULIAN_DAY = 2440588; // Jaunary 1, 1970 (Gregorian) + static final int JAN_1_1_JULIAN_DAY = 1721426; // January 1, year 1 (Gregorian) + + // Useful millisecond constants + static final int ONE_SECOND = 1000; + static final int ONE_MINUTE = 60*ONE_SECOND; + static final int ONE_HOUR = 60*ONE_MINUTE; + static final int ONE_DAY = 24*ONE_HOUR; + static final int ONE_WEEK = 7*ONE_DAY; + static final long ONE_YEAR = (long)(365.2425 * ONE_DAY); + + static long ORIGIN; // This is the *approximate* point at which BC switches to AD + + public static void main(String argv[]) throws Exception { + new CalendarLimitTest().run(argv); + } + + /** + * Converts Julian day to time as milliseconds. + * @param julian the given Julian day number. + * @return time as milliseconds. + */ + private static final long julianDayToMillis(long julian) { + return (julian - EPOCH_JULIAN_DAY) * ONE_DAY; + } + + /** + * Verify that the given time is processed without problem. + * @return the adjust year, with 0 = 1 BC, -1 = 2 BC, etc. + */ + int test(long millis, Calendar cal, DateFormat fmt) + { + Exception exception = null; + String theDate = ""; + try { + Date d= new Date(millis); + cal.setTime(d); + theDate = fmt.format(d); + } + catch (IllegalArgumentException e) { + exception = e; + } + String s = "0x" + Long.toHexString(millis) + " " + theDate; + + int era=cal.get(Calendar.ERA), year=cal.get(Calendar.YEAR), + dom=cal.get(Calendar.DATE), mon=cal.get(Calendar.MONTH); + + cal.clear(); + cal.set(year, mon, dom); + cal.set(Calendar.ERA, era); + Date rt = cal.getTime(); + + boolean ok = true; + if (exception != null) { + errln("FAIL: Exception " + s); + ok = false; + } + if (((millis >= ORIGIN) && (era != GregorianCalendar.AD)) || + ((millis < ORIGIN) && (era != GregorianCalendar.BC)) || + (year < 1)) { + errln("FAIL: Bad year/era " + s); + ok = false; + } + if (dom<1 || dom>31) { + errln("FAIL: Bad DOM " + s); + ok = false; + } + if (Math.abs(millis - rt.getTime()) > ONE_DAY) { + errln("FAIL: RT fail " + s + " -> 0x" + + Long.toHexString(rt.getTime()) + " " + + fmt.format(rt)); + ok = false; + } + if (ok) logln(s); + if (era==GregorianCalendar.BC) year = 1-year; + return year; + } + + public void TestCalendarLimit() + { + ORIGIN = julianDayToMillis(JAN_1_1_JULIAN_DAY); + + Calendar cal = Calendar.getInstance(); + // You must set the time zone to GMT+0 or the edge cases like + // Long.MIN_VALUE, Long.MAX_VALUE, and right around the threshold + // won't work, since before converting to fields the calendar code + // will add the offset for the zone. + cal.setTimeZone(TimeZone.getTimeZone("Africa/Casablanca")); + + DateFormat dateFormat = DateFormat.getDateInstance(); + dateFormat.setCalendar(cal); // Make sure you do this -- same reason as above + ((SimpleDateFormat)dateFormat).applyPattern("MMM d, yyyy G"); + + // Don't expect any failure for positive longs + int lastYear=0; + boolean first=true; + for (long m = Long.MAX_VALUE; m > 0; m >>= 1) + { + int y = test(m, cal, dateFormat); + if (!first && y > lastYear) + errln("FAIL: Years should be decreasing " + lastYear + " " + y); + first = false; + lastYear = y; + } + + // Expect failures for negative millis below threshold + first = true; + for (long m = Long.MIN_VALUE; m < 0; m /= 2) // Don't use m >>= 1 + { + int y = test(m, cal, dateFormat); + if (!first && y < lastYear) + errln("FAIL: Years should be increasing " + lastYear + " " + y); + first = false; + lastYear = y; + } + + // Test right around the threshold + test(EARLIEST_SUPPORTED_MILLIS, cal, dateFormat); + test(EARLIEST_SUPPORTED_MILLIS-1, cal, dateFormat); + + // Test a date that should work + test(Long.MIN_VALUE + ONE_DAY, cal, dateFormat); + + // Try hours in the earliest day or two + // JUST FOR DEBUGGING: + if (false) { + ((SimpleDateFormat)dateFormat).applyPattern("H:mm MMM d, yyyy G"); + for (int dom=2; dom<=3; ++dom) { + for (int h=0; h<24; ++h) { + cal.clear(); + cal.set(Calendar.ERA, GregorianCalendar.BC); + cal.set(292269055, Calendar.DECEMBER, dom, h, 0); + Date d = cal.getTime(); + cal.setTime(d); + logln("" + h + ":00 Dec "+dom+", 292269055 BC -> " + + Long.toHexString(d.getTime()) + " -> " + + dateFormat.format(cal.getTime())); + } + } + // Other way + long t = 0x80000000018c5c00L; // Dec 3, 292269055 BC + while (t<0) { + cal.setTime(new Date(t)); + logln("0x" + Long.toHexString(t) + " -> " + + dateFormat.format(cal.getTime())); + t -= ONE_HOUR; + } + } + } +} + +//eof