TimeZoneTest.java

/*
 * Copyright (c) 1997, 2019, 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
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 * questions.
 */

/*
 * @test
 * @bug 4028006 4044013 4096694 4107276 4107570 4112869 4130885 7039469 7126465 7158483
 *      8008577 8077685 8098547 8133321 8138716 8148446 8151876 8228469
 * @library /java/text/testlib
 * @summary test TimeZone
 */

import java.io.*;
import java.text.*;
import java.util.*;
import sun.util.resources.LocaleData;

public class TimeZoneTest extends IntlTest
{
    static final int millisPerHour = 3600000;

    public static void main(String[] args) throws Exception {
        new TimeZoneTest().run(args);
    }

    /**
     * Bug 4130885
     * Certain short zone IDs, used since 1.1.x, are incorrect.
     *
     * The worst of these is:
     *
     * "CAT" (Central African Time) should be GMT+2:00, but instead returns a
     * zone at GMT-1:00. The zone at GMT-1:00 should be called EGT, CVT, EGST,
     * or AZOST, depending on which zone is meant, but in no case is it CAT.
     *
     * Other wrong zone IDs:
     *
     * ECT (European Central Time) GMT+1:00: ECT is Ecuador Time,
     * GMT-5:00. European Central time is abbreviated CEST.
     *
     * SST (Solomon Island Time) GMT+11:00. SST is actually Samoa Standard Time,
     * GMT-11:00. Solomon Island time is SBT.
     *
     * NST (New Zealand Time) GMT+12:00. NST is the abbreviation for
     * Newfoundland Standard Time, GMT-3:30. New Zealanders use NZST.
     *
     * AST (Alaska Standard Time) GMT-9:00. [This has already been noted in
     * another bug.] It should be "AKST". AST is Atlantic Standard Time,
     * GMT-4:00.
     *
     * PNT (Phoenix Time) GMT-7:00. PNT usually means Pitcairn Time,
     * GMT-8:30. There is no standard abbreviation for Phoenix time, as distinct
     * from MST with daylight savings.
     *
     * In addition to these problems, a number of zones are FAKE. That is, they
     * don't match what people use in the real world.
     *
     * FAKE zones:
     *
     * EET (should be EEST)
     * ART (should be EET)
     * MET (should be IRST)
     * NET (should be AMST)
     * PLT (should be PKT)
     * BST (should be BDT)
     * VST (should be ICT)
     * CTT (should be CST) +
     * ACT (should be CST) +
     * AET (should be EST) +
     * MIT (should be WST) +
     * IET (should be EST) +
     * PRT (should be AST) +
     * CNT (should be NST)
     * AGT (should be ARST)
     * BET (should be EST) +
     *
     * + A zone with the correct name already exists and means something
     * else. E.g., EST usually indicates the US Eastern zone, so it cannot be
     * used for Brazil (BET).
     */
    public void TestShortZoneIDs() throws Exception {

        ZoneDescriptor[] JDK_116_REFERENCE_LIST = {
            new ZoneDescriptor("MIT", 780, true),
            new ZoneDescriptor("HST", -600, false),
            new ZoneDescriptor("AST", -540, true),
            new ZoneDescriptor("PST", -480, true),
            new ZoneDescriptor("PNT", -420, false),
            new ZoneDescriptor("MST", -420, false),
            new ZoneDescriptor("CST", -360, true),
            new ZoneDescriptor("IET", -300, true),
            new ZoneDescriptor("EST", -300, false),
            new ZoneDescriptor("PRT", -240, false),
            new ZoneDescriptor("CNT", -210, true),
            new ZoneDescriptor("AGT", -180, false),
            new ZoneDescriptor("BET", -180, false),
            // new ZoneDescriptor("CAT", -60, false), // Wrong:
            // As of bug 4130885, fix CAT (Central Africa)
            new ZoneDescriptor("CAT", 120, false), // Africa/Harare
            new ZoneDescriptor("GMT", 0, false),
            new ZoneDescriptor("UTC", 0, false),
            new ZoneDescriptor("ECT", 60, true),
            new ZoneDescriptor("ART", 120, false),
            new ZoneDescriptor("EET", 120, true),
            new ZoneDescriptor("EAT", 180, false),
            new ZoneDescriptor("MET", 60, true),
            new ZoneDescriptor("NET", 240, false),
            new ZoneDescriptor("PLT", 300, false),
            new ZoneDescriptor("IST", 330, false),
            new ZoneDescriptor("BST", 360, false),
            new ZoneDescriptor("VST", 420, false),
            new ZoneDescriptor("CTT", 480, false),
            new ZoneDescriptor("JST", 540, false),
            new ZoneDescriptor("ACT", 570, false),
            new ZoneDescriptor("AET", 600, true),
            new ZoneDescriptor("SST", 660, false),
            // new ZoneDescriptor("NST", 720, false),
            // As of bug 4130885, fix NST (New Zealand)
            new ZoneDescriptor("NST", 720, true), // Pacific/Auckland
        };

        Map<String, ZoneDescriptor> hash = new HashMap<>();

        String[] ids = TimeZone.getAvailableIDs();
        for (String id : ids) {
            if (id.length() == 3) {
                hash.put(id, new ZoneDescriptor(TimeZone.getTimeZone(id)));
            }
        }

        for (int i = 0; i < JDK_116_REFERENCE_LIST.length; ++i) {
            ZoneDescriptor referenceZone = JDK_116_REFERENCE_LIST[i];
            ZoneDescriptor currentZone = hash.get(referenceZone.getID());
            if (referenceZone.equals(currentZone)) {
                logln("ok " + referenceZone);
            }
            else {
                errln("Fail: Expected " + referenceZone +
                      "; got " + currentZone);
            }
        }
    }

    /**
     * A descriptor for a zone; used to regress the short zone IDs.
     */
    static class ZoneDescriptor {
        String id;
        int offset; // In minutes
        boolean daylight;

        ZoneDescriptor(TimeZone zone) {
            this.id = zone.getID();
            this.offset = zone.getRawOffset() / 60000;
            this.daylight = zone.useDaylightTime();
        }

        ZoneDescriptor(String id, int offset, boolean daylight) {
            this.id = id;
            this.offset = offset;
            this.daylight = daylight;
        }

        public String getID() { return id; }

        @Override
        public boolean equals(Object o) {
            ZoneDescriptor that = (ZoneDescriptor)o;
            return that != null &&
                id.equals(that.id) &&
                offset == that.offset &&
                daylight == that.daylight;
        }

        @Override
        public int hashCode() {
            return id.hashCode() ^ offset | (daylight ? 1 : 0);
        }

        @Override
        public String toString() {
            int min = offset;
            char sign = '+';
            if (min < 0) { sign = '-'; min = -min; }

            return "Zone[\"" + id + "\", GMT" + sign + (min/60) + ':' +
                (min%60<10?"0":"") + (min%60) + ", " +
                (daylight ? "Daylight" : "Standard") + "]";
        }

        public static int compare(Object o1, Object o2) {
            ZoneDescriptor i1 = (ZoneDescriptor)o1;
            ZoneDescriptor i2 = (ZoneDescriptor)o2;
            if (i1.offset > i2.offset) return 1;
            if (i1.offset < i2.offset) return -1;
            if (i1.daylight && !i2.daylight) return 1;
            if (!i1.daylight && i2.daylight) return -1;
            return i1.id.compareTo(i2.id);
        }
    }

    static final String formatMinutes(int min) {
        char sign = '+';
        if (min < 0) { sign = '-'; min = -min; }
        int h = min/60;
        min = min%60;
        return "" + sign + h + ":" + ((min<10) ? "0" : "") + min;
    }
    /**
     * As part of the VM fix (see CCC approved RFE 4028006, bug
     * 4044013), TimeZone.getTimeZone() has been modified to recognize
     * generic IDs of the form GMT[+-]hh:mm, GMT[+-]hhmm, and
     * GMT[+-]hh.  Test this behavior here.
     *
     * Bug 4044013
     *
     * ID "Custom" is no longer used for TimeZone objects created with
     * a custom time zone ID, such as "GMT-8". See 4322313.
     */
    public void TestCustomParse() throws Exception {
        Object[] DATA = {
            // ID        Expected offset in minutes
            "GMT",       null,
            "GMT+0",     new Integer(0),
            "GMT+1",     new Integer(60),
            "GMT-0030",  new Integer(-30),
            "GMT+15:99", null,
            "GMT+",      null,
            "GMT-",      null,
            "GMT+0:",    null,
            "GMT-:",     null,
            "GMT+0010",  new Integer(10), // Interpret this as 00:10
            "GMT-10",    new Integer(-10*60),
            "GMT+30",    null,
            "GMT-3:30",  new Integer(-(3*60+30)),
            "GMT-230",   new Integer(-(2*60+30)),
        };
        for (int i=0; i<DATA.length; i+=2) {
            String id = (String)DATA[i];
            Integer exp = (Integer)DATA[i+1];
            TimeZone zone = TimeZone.getTimeZone(id);
            if (zone.getID().equals("GMT")) {
                logln(id + " -> generic GMT");
                // When TimeZone.getTimeZone() can't parse the id, it
                // returns GMT -- a dubious practice, but required for
                // backward compatibility.
                if (exp != null) {
                    throw new Exception("Expected offset of " + formatMinutes(exp.intValue()) +
                                        " for " + id + ", got parse failure");
                }
            }
            else {
                int ioffset = zone.getRawOffset()/60000;
                String offset = formatMinutes(ioffset);
                logln(id + " -> " + zone.getID() + " GMT" + offset);
                if (exp == null) {
                    throw new Exception("Expected parse failure for " + id +
                                        ", got offset of " + offset +
                                        ", id " + zone.getID());
                }
                else if (ioffset != exp.intValue()) {
                    throw new Exception("Expected offset of " + formatMinutes(exp.intValue()) +
                                        ", id Custom, for " + id +
                                        ", got offset of " + offset +
                                        ", id " + zone.getID());
                }
            }
        }
    }

    /**
     * Test the basic functionality of the getDisplayName() API.
     *
     * Bug 4112869
     * Bug 4028006
     *
     * See also API change request A41.
     *
     * 4/21/98 - make smarter, so the test works if the ext resources
     * are present or not.
     */
    public void TestDisplayName() {
        TimeZone zone = TimeZone.getTimeZone("PST");
        String name = zone.getDisplayName(Locale.ENGLISH);
        logln("PST->" + name);
        if (!name.equals("Pacific Standard Time"))
            errln("Fail: Expected \"Pacific Standard Time\"");

        //*****************************************************************
        // THE FOLLOWING LINES MUST BE UPDATED IF THE LOCALE DATA CHANGES
        // THE FOLLOWING LINES MUST BE UPDATED IF THE LOCALE DATA CHANGES
        // THE FOLLOWING LINES MUST BE UPDATED IF THE LOCALE DATA CHANGES
        //*****************************************************************
        Object[] DATA = {
            new Boolean(false), new Integer(TimeZone.SHORT), "PST",
            new Boolean(true),  new Integer(TimeZone.SHORT), "PDT",
            new Boolean(false), new Integer(TimeZone.LONG),  "Pacific Standard Time",
            new Boolean(true),  new Integer(TimeZone.LONG),  "Pacific Daylight Time",
        };

        for (int i=0; i<DATA.length; i+=3) {
            name = zone.getDisplayName(((Boolean)DATA[i]).booleanValue(),
                                       ((Integer)DATA[i+1]).intValue(),
                                       Locale.ENGLISH);
            if (!name.equals(DATA[i+2]))
                errln("Fail: Expected " + DATA[i+2] + "; got " + name);
        }

        // Make sure that we don't display the DST name by constructing a fake
        // PST zone that has DST all year long.
        SimpleTimeZone zone2 = new SimpleTimeZone(0, "PST");
        zone2.setStartRule(Calendar.JANUARY, 1, 0);
        zone2.setEndRule(Calendar.DECEMBER, 31, 0);
        logln("Modified PST inDaylightTime->" + zone2.inDaylightTime(new Date()));
        name = zone2.getDisplayName(Locale.ENGLISH);
        logln("Modified PST->" + name);
        if (!name.equals("Pacific Standard Time"))
            errln("Fail: Expected \"Pacific Standard Time\"");

        // Make sure we get the default display format for Locales
        // with no display name data.
        Locale zh_CN = Locale.SIMPLIFIED_CHINESE;
        name = zone.getDisplayName(zh_CN);
        //*****************************************************************
        // THE FOLLOWING LINE MUST BE UPDATED IF THE LOCALE DATA CHANGES
        // THE FOLLOWING LINE MUST BE UPDATED IF THE LOCALE DATA CHANGES
        // THE FOLLOWING LINE MUST BE UPDATED IF THE LOCALE DATA CHANGES
        //*****************************************************************
        logln("PST(zh_CN)->" + name);

        // Now be smart -- check to see if zh resource is even present.
        // If not, we expect the en fallback behavior.
        ResourceBundle enRB = LocaleData.getBundle("sun.util.resources.TimeZoneNames",
                                                   Locale.ENGLISH);
        ResourceBundle zhRB = LocaleData.getBundle("sun.util.resources.TimeZoneNames",
                                                   zh_CN);

        boolean noZH = enRB == zhRB;

        if (noZH) {
            logln("Warning: Not testing the zh_CN behavior because resource is absent");
            if (!name.equals("Pacific Standard Time"))
                errln("Fail: Expected Pacific Standard Time");
        }
        else if (!name.equals("Pacific Standard Time") &&
                 !name.equals("\u592a\u5e73\u6d0b\u6807\u51c6\u65f6\u95f4") &&
                 !name.equals("GMT-08:00") &&
                 !name.equals("GMT-8:00") &&
                 !name.equals("GMT-0800") &&
                 !name.equals("GMT-800")) {
            errln("Fail: Expected GMT-08:00 or something similar");
            errln("************************************************************");
            errln("THE ABOVE FAILURE MAY JUST MEAN THE LOCALE DATA HAS CHANGED");
            errln("************************************************************");
        }

        // Now try a non-existent zone
        zone2 = new SimpleTimeZone(90*60*1000, "xyzzy");
        name = zone2.getDisplayName(Locale.ENGLISH);
        logln("GMT+90min->" + name);
        if (!name.equals("GMT+01:30") &&
            !name.equals("GMT+1:30") &&
            !name.equals("GMT+0130") &&
            !name.equals("GMT+130"))
            errln("Fail: Expected GMT+01:30 or something similar");
    }

    public void TestGenericAPI() {
        String id = "NewGMT";
        int offset = 12345;

        SimpleTimeZone zone = new SimpleTimeZone(offset, id);
        if (zone.useDaylightTime()) {
            errln("FAIL: useDaylightTime should return false");
        }

        TimeZone zoneclone = (TimeZone)zone.clone();
        if (!zoneclone.equals(zone)) {
            errln("FAIL: clone or operator== failed");
        }
        zoneclone.setID("abc");
        if (zoneclone.equals(zone)) {
            errln("FAIL: clone or operator!= failed");
        }

        zoneclone = (TimeZone)zone.clone();
        if (!zoneclone.equals(zone)) {
            errln("FAIL: clone or operator== failed");
        }
        zoneclone.setRawOffset(45678);
        if (zoneclone.equals(zone)) {
            errln("FAIL: clone or operator!= failed");
        }

        TimeZone saveDefault = TimeZone.getDefault();
        try {
            TimeZone.setDefault(zone);
            TimeZone defaultzone = TimeZone.getDefault();
            if (defaultzone == zone) {
                errln("FAIL: Default object is identical, not clone");
            }
            if (!defaultzone.equals(zone)) {
                errln("FAIL: Default object is not equal");
            }
        }
        finally {
            TimeZone.setDefault(saveDefault);
        }
    }

    @SuppressWarnings("deprecation")
    public void TestRuleAPI()
    {
        // ErrorCode status = ZERO_ERROR;

        int offset = (int)(60*60*1000*1.75); // Pick a weird offset
        SimpleTimeZone zone = new SimpleTimeZone(offset, "TestZone");
        if (zone.useDaylightTime()) errln("FAIL: useDaylightTime should return false");

        // Establish our expected transition times.  Do this with a non-DST
        // calendar with the (above) declared local offset.
        GregorianCalendar gc = new GregorianCalendar(zone);
        gc.clear();
        gc.set(1990, Calendar.MARCH, 1);
        long marchOneStd = gc.getTime().getTime(); // Local Std time midnight
        gc.clear();
        gc.set(1990, Calendar.JULY, 1);
        long julyOneStd = gc.getTime().getTime(); // Local Std time midnight

        // Starting and ending hours, WALL TIME
        int startHour = (int)(2.25 * 3600000);
        int endHour   = (int)(3.5  * 3600000);

        zone.setStartRule(Calendar.MARCH, 1, 0, startHour);
        zone.setEndRule  (Calendar.JULY,  1, 0, endHour);

        gc = new GregorianCalendar(zone);
        // if (failure(status, "new GregorianCalendar")) return;

        long marchOne = marchOneStd + startHour;
        long julyOne = julyOneStd + endHour - 3600000; // Adjust from wall to Std time

        long expMarchOne = 636251400000L;
        if (marchOne != expMarchOne)
        {
            errln("FAIL: Expected start computed as " + marchOne +
                  " = " + new Date(marchOne));
            logln("      Should be                  " + expMarchOne +
                  " = " + new Date(expMarchOne));
        }

        long expJulyOne = 646793100000L;
        if (julyOne != expJulyOne)
        {
            errln("FAIL: Expected start computed as " + julyOne +
                  " = " + new Date(julyOne));
            logln("      Should be                  " + expJulyOne +
                  " = " + new Date(expJulyOne));
        }

        testUsingBinarySearch(zone, new Date(90, Calendar.JANUARY, 1).getTime(),
                              new Date(90, Calendar.JUNE, 15).getTime(), marchOne);
        testUsingBinarySearch(zone, new Date(90, Calendar.JUNE, 1).getTime(),
                              new Date(90, Calendar.DECEMBER, 31).getTime(), julyOne);

        if (zone.inDaylightTime(new Date(marchOne - 1000)) ||
            !zone.inDaylightTime(new Date(marchOne)))
            errln("FAIL: Start rule broken");
        if (!zone.inDaylightTime(new Date(julyOne - 1000)) ||
            zone.inDaylightTime(new Date(julyOne)))
            errln("FAIL: End rule broken");

        zone.setStartYear(1991);
        if (zone.inDaylightTime(new Date(marchOne)) ||
            zone.inDaylightTime(new Date(julyOne - 1000)))
            errln("FAIL: Start year broken");

        // failure(status, "TestRuleAPI");
        // delete gc;
        // delete zone;
    }

    void testUsingBinarySearch(SimpleTimeZone tz, long min, long max, long expectedBoundary)
    {
        // ErrorCode status = ZERO_ERROR;
        boolean startsInDST = tz.inDaylightTime(new Date(min));
        // if (failure(status, "SimpleTimeZone::inDaylightTime")) return;
        if (tz.inDaylightTime(new Date(max)) == startsInDST) {
            logln("Error: inDaylightTime(" + new Date(max) + ") != " + (!startsInDST));
            return;
        }
        // if (failure(status, "SimpleTimeZone::inDaylightTime")) return;
        while ((max - min) > INTERVAL) {
            long mid = (min + max) / 2;
            if (tz.inDaylightTime(new Date(mid)) == startsInDST) {
                min = mid;
            }
            else {
                max = mid;
            }
            // if (failure(status, "SimpleTimeZone::inDaylightTime")) return;
        }
        logln("Binary Search Before: " + min + " = " + new Date(min));
        logln("Binary Search After:  " + max + " = " + new Date(max));
        long mindelta = expectedBoundary - min;
        long maxdelta = max - expectedBoundary;
        if (mindelta >= 0 &&
            mindelta <= INTERVAL &&
            mindelta >= 0 &&
            mindelta <= INTERVAL)
            logln("PASS: Expected bdry:  " + expectedBoundary + " = " + new Date(expectedBoundary));
        else
            errln("FAIL: Expected bdry:  " + expectedBoundary + " = " + new Date(expectedBoundary));
    }

    static final int INTERVAL = 100;

    // Bug 006; verify the offset for a specific zone.
    public void TestPRTOffset()
    {
        TimeZone tz = TimeZone.getTimeZone( "PRT" );
        if( tz == null ) {
            errln( "FAIL: TimeZone(PRT) is null" );
        }
        else{
            if (tz.getRawOffset() != (-4*millisPerHour))
                errln("FAIL: Offset for PRT should be -4");
        }

    }

    // Test various calls
    @SuppressWarnings("deprecation")
    public void TestVariousAPI518()
    {
        TimeZone time_zone = TimeZone.getTimeZone("PST");
        Date d = new Date(97, Calendar.APRIL, 30);

        logln("The timezone is " + time_zone.getID());

        if (time_zone.inDaylightTime(d) != true)
            errln("FAIL: inDaylightTime returned false");

        if (time_zone.useDaylightTime() != true)
            errln("FAIL: useDaylightTime returned false");

        if (time_zone.getRawOffset() != -8*millisPerHour)
            errln( "FAIL: getRawOffset returned wrong value");

        GregorianCalendar gc = new GregorianCalendar();
        gc.setTime(d);
        if (time_zone.getOffset(gc.AD, gc.get(gc.YEAR), gc.get(gc.MONTH),
                                gc.get(gc.DAY_OF_MONTH),
                                gc.get(gc.DAY_OF_WEEK), 0)
            != -7*millisPerHour)
            errln("FAIL: getOffset returned wrong value");
    }

    // Test getAvailableID API
    public void TestGetAvailableIDs913()
    {
        StringBuffer buf = new StringBuffer("TimeZone.getAvailableIDs() = { ");
        String[] s = TimeZone.getAvailableIDs();
        for (int i=0; i<s.length; ++i)
        {
            if (i > 0) buf.append(", ");
            buf.append(s[i]);
        }
        buf.append(" };");
        logln(buf.toString());

        buf.setLength(0);
        buf.append("TimeZone.getAvailableIDs(GMT+02:00) = { ");
        s = TimeZone.getAvailableIDs(+2 * 60 * 60 * 1000);
        for (int i=0; i<s.length; ++i)
        {
            if (i > 0) buf.append(", ");
            buf.append(s[i]);
        }
        buf.append(" };");
        logln(buf.toString());

        TimeZone tz = TimeZone.getTimeZone("PST");
        if (tz != null)
            logln("getTimeZone(PST) = " + tz.getID());
        else
            errln("FAIL: getTimeZone(PST) = null");

        tz = TimeZone.getTimeZone("America/Los_Angeles");
        if (tz != null)
            logln("getTimeZone(America/Los_Angeles) = " + tz.getID());
        else
            errln("FAIL: getTimeZone(PST) = null");

        // Bug 4096694
        tz = TimeZone.getTimeZone("NON_EXISTENT");
        if (tz == null)
            errln("FAIL: getTimeZone(NON_EXISTENT) = null");
        else if (!tz.getID().equals("GMT"))
            errln("FAIL: getTimeZone(NON_EXISTENT) = " + tz.getID());
    }

    /**
     * Bug 4107276
     */
    public void TestDSTSavings() {
        // It might be better to find a way to integrate this test into the main TimeZone
        // tests above, but I don't have time to figure out how to do this (or if it's
        // even really a good idea).  Let's consider that a future.  --rtg 1/27/98
        SimpleTimeZone tz = new SimpleTimeZone(-5 * millisPerHour, "dstSavingsTest",
                                               Calendar.MARCH, 1, 0, 0, Calendar.SEPTEMBER, 1, 0, 0,
                                               (int)(0.5 * millisPerHour));

        if (tz.getRawOffset() != -5 * millisPerHour)
            errln("Got back a raw offset of " + (tz.getRawOffset() / millisPerHour) +
                  " hours instead of -5 hours.");
        if (!tz.useDaylightTime())
            errln("Test time zone should use DST but claims it doesn't.");
        if (tz.getDSTSavings() != 0.5 * millisPerHour)
            errln("Set DST offset to 0.5 hour, but got back " + (tz.getDSTSavings() /
                                                                 millisPerHour) + " hours instead.");

        int offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.JANUARY, 1,
                                  Calendar.THURSDAY, 10 * millisPerHour);
        if (offset != -5 * millisPerHour)
            errln("The offset for 10 AM, 1/1/98 should have been -5 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.JUNE, 1, Calendar.MONDAY,
                              10 * millisPerHour);
        if (offset != -4.5 * millisPerHour)
            errln("The offset for 10 AM, 6/1/98 should have been -4.5 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        tz.setDSTSavings(millisPerHour);
        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.JANUARY, 1,
                              Calendar.THURSDAY, 10 * millisPerHour);
        if (offset != -5 * millisPerHour)
            errln("The offset for 10 AM, 1/1/98 should have been -5 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.JUNE, 1, Calendar.MONDAY,
                              10 * millisPerHour);
        if (offset != -4 * millisPerHour)
            errln("The offset for 10 AM, 6/1/98 (with a 1-hour DST offset) should have been -4 hours, but we got "
                  + (offset / millisPerHour) + " hours.");
    }

    /**
     * Bug 4107570
     */
    public void TestAlternateRules() {
        // Like TestDSTSavings, this test should probably be integrated somehow with the main
        // test at the top of this class, but I didn't have time to figure out how to do that.
        //                      --rtg 1/28/98

        SimpleTimeZone tz = new SimpleTimeZone(-5 * millisPerHour, "alternateRuleTest");

        // test the day-of-month API
        tz.setStartRule(Calendar.MARCH, 10, 12 * millisPerHour);
        tz.setEndRule(Calendar.OCTOBER, 20, 12 * millisPerHour);

        int offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.MARCH, 5,
                                  Calendar.THURSDAY, 10 * millisPerHour);
        if (offset != -5 * millisPerHour)
            errln("The offset for 10AM, 3/5/98 should have been -5 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.MARCH, 15,
                              Calendar.SUNDAY, 10 * millisPerHour);
        if (offset != -4 * millisPerHour)
            errln("The offset for 10AM, 3/15/98 should have been -4 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.OCTOBER, 15,
                              Calendar.THURSDAY, 10 * millisPerHour);
        if (offset != -4 * millisPerHour)
            errln("The offset for 10AM, 10/15/98 should have been -4 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.OCTOBER, 25,
                              Calendar.SUNDAY, 10 * millisPerHour);
        if (offset != -5 * millisPerHour)
            errln("The offset for 10AM, 10/25/98 should have been -5 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        // test the day-of-week-after-day-in-month API
        tz.setStartRule(Calendar.MARCH, 10, Calendar.FRIDAY, 12 * millisPerHour, true);
        tz.setEndRule(Calendar.OCTOBER, 20, Calendar.FRIDAY, 12 * millisPerHour, false);

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.MARCH, 11,
                              Calendar.WEDNESDAY, 10 * millisPerHour);
        if (offset != -5 * millisPerHour)
            errln("The offset for 10AM, 3/11/98 should have been -5 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.MARCH, 14,
                              Calendar.SATURDAY, 10 * millisPerHour);
        if (offset != -4 * millisPerHour)
            errln("The offset for 10AM, 3/14/98 should have been -4 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.OCTOBER, 15,
                              Calendar.THURSDAY, 10 * millisPerHour);
        if (offset != -4 * millisPerHour)
            errln("The offset for 10AM, 10/15/98 should have been -4 hours, but we got "
                  + (offset / millisPerHour) + " hours.");

        offset = tz.getOffset(GregorianCalendar.AD, 1998, Calendar.OCTOBER, 17,
                              Calendar.SATURDAY, 10 * millisPerHour);
        if (offset != -5 * millisPerHour)
            errln("The offset for 10AM, 10/17/98 should have been -5 hours, but we got "
                  + (offset / millisPerHour) + " hours.");
    }
}

//eof