jdk/test/java/util/Calendar/CalendarLimitTest.java - platform/libcore - Git at Google

 /*
  * 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
	/*
	* 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