Check in the pristine copy of ICU 4.6...

icu46/source/test/intltest/tzbdtest.cpp

+/***********************************************************************
+ * COPYRIGHT: 
+ * Copyright (c) 1997-2010, International Business Machines Corporation
+ * and others. All Rights Reserved.
+ ***********************************************************************/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+#include "tzbdtest.h"
+#include "unicode/timezone.h"
+#include "unicode/simpletz.h"
+#include "unicode/gregocal.h"
+#include "putilimp.h"
+
+void TimeZoneBoundaryTest::runIndexedTest( int32_t index, UBool exec, const char* &name, char* /*par*/ )
+{
+    if (exec) logln("TestSuite TestTimeZoneBoundary");
+    switch (index) {
+        case 0:
+            name = "TestBoundaries";
+            if (exec) {
+                logln("TestBoundaries---"); logln("");
+                TestBoundaries();
+            }
+            break;
+        case 1:
+            name = "TestNewRules";
+            if (exec) {
+                logln("TestNewRules---"); logln("");
+                TestNewRules();
+            }
+            break;
+        case 2:
+            name = "TestStepwise";
+            if (exec) {
+                logln("TestStepwise---"); logln("");
+                TestStepwise();
+            }
+            break;
+        default: name = ""; break;
+    }
+}
+
+// *****************************************************************************
+// class TimeZoneBoundaryTest
+// *****************************************************************************
+
+TimeZoneBoundaryTest::TimeZoneBoundaryTest()
+:
+ONE_SECOND(1000),
+ONE_MINUTE(60 * ONE_SECOND),
+ONE_HOUR(60 * ONE_MINUTE),
+ONE_DAY(24 * ONE_HOUR),
+ONE_YEAR(uprv_floor(365.25 * ONE_DAY)),
+SIX_MONTHS(ONE_YEAR / 2)
+{
+}
+
+const int32_t TimeZoneBoundaryTest::MONTH_LENGTH[] = {
+    31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+};
+ 
+const UDate TimeZoneBoundaryTest::PST_1997_BEG = 860320800000.0;
+ 
+const UDate TimeZoneBoundaryTest::PST_1997_END = 877856400000.0;
+ 
+const UDate TimeZoneBoundaryTest::INTERVAL = 10;
+ 
+// -------------------------------------
+ 
+void
+TimeZoneBoundaryTest::findDaylightBoundaryUsingDate(UDate d, const char* startMode, UDate expectedBoundary)
+{
+    UnicodeString str;
+    if (dateToString(d, str).indexOf(startMode) == - 1) {
+        logln(UnicodeString("Error: ") + startMode + " not present in " + str);
+    }
+    UDate min = d;
+    UDate max = min + SIX_MONTHS;
+    while ((max - min) > INTERVAL) {
+        UDate mid = (min + max) / 2;
+        UnicodeString* s = &dateToString(mid, str);
+        if (s->indexOf(startMode) != - 1) {
+            min = mid;
+        }
+        else {
+            max = mid;
+        }
+    }
+    logln("Date Before: " + showDate(min));
+    logln("Date After:  " + showDate(max));
+    UDate mindelta = expectedBoundary - min;
+    UDate maxdelta = max - expectedBoundary;
+    if (mindelta >= 0 &&
+        mindelta <= INTERVAL &&
+        maxdelta >= 0 &&
+        maxdelta <= INTERVAL) logln(UnicodeString("PASS: Expected boundary at ") + expectedBoundary);
+    else dataerrln(UnicodeString("FAIL: Expected boundary at ") + expectedBoundary);
+}
+ 
+// -------------------------------------
+ 
+void
+TimeZoneBoundaryTest::findDaylightBoundaryUsingTimeZone(UDate d, UBool startsInDST, UDate expectedBoundary)
+{
+    TimeZone *zone = TimeZone::createDefault();
+    findDaylightBoundaryUsingTimeZone(d, startsInDST, expectedBoundary, zone);
+    delete zone;
+}
+ 
+// -------------------------------------
+ 
+void
+TimeZoneBoundaryTest::findDaylightBoundaryUsingTimeZone(UDate d, UBool startsInDST, UDate expectedBoundary, TimeZone* tz)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    UnicodeString str;
+    UDate min = d;
+    UDate max = min + SIX_MONTHS;
+    if (tz->inDaylightTime(d, status) != startsInDST) {
+        dataerrln("FAIL: " + tz->getID(str) + " inDaylightTime(" + dateToString(d) + ") != " + (startsInDST ? "true" : "false"));
+        startsInDST = !startsInDST;
+    }
+    if (failure(status, "TimeZone::inDaylightTime", TRUE)) return;
+    if (tz->inDaylightTime(max, status) == startsInDST) {
+        dataerrln("FAIL: " + tz->getID(str) + " inDaylightTime(" + dateToString(max) + ") != " + (startsInDST ? "false" : "true"));
+        return;
+    }
+    if (failure(status, "TimeZone::inDaylightTime")) return;
+    while ((max - min) > INTERVAL) {
+        UDate mid = (min + max) / 2;
+        UBool isIn = tz->inDaylightTime(mid, status);
+        if (failure(status, "TimeZone::inDaylightTime")) return;
+        if (isIn == startsInDST) {
+            min = mid;
+        }
+        else {
+            max = mid;
+        }
+    }
+    logln(tz->getID(str) + " Before: " + showDate(min));
+    logln(tz->getID(str) + " After:  " + showDate(max));
+    UDate mindelta = expectedBoundary - min;
+    UDate maxdelta = max - expectedBoundary;
+    if (mindelta >= 0 &&
+        mindelta <= INTERVAL &&
+        maxdelta >= 0 &&
+        maxdelta <= INTERVAL) logln(UnicodeString("PASS: Expected boundary at ") + expectedBoundary);
+    else errln(UnicodeString("FAIL: Expected boundary at ") + expectedBoundary);
+}
+ 
+// -------------------------------------
+/*
+UnicodeString*
+TimeZoneBoundaryTest::showDate(int32_t l)
+{
+    return showDate(new Date(l));
+}
+*/
+// -------------------------------------
+ 
+UnicodeString
+TimeZoneBoundaryTest::showDate(UDate d)
+{
+    int32_t y, m, day, h, min, sec;
+    dateToFields(d, y, m, day, h, min, sec);
+    return UnicodeString("") + y + "/" + showNN(m + 1) + "/" +
+        showNN(day) + " " + showNN(h) + ":" + showNN(min) +
+        " \"" + dateToString(d) + "\" = " + uprv_floor(d+0.5);
+}
+ 
+// -------------------------------------
+ 
+UnicodeString
+TimeZoneBoundaryTest::showNN(int32_t n)
+{
+    UnicodeString nStr;
+    if (n < 10) {
+        nStr += UnicodeString("0", "");
+    }
+    return nStr + n;
+}
+ 
+// -------------------------------------
+ 
+void
+TimeZoneBoundaryTest::verifyDST(UDate d, TimeZone* time_zone, UBool expUseDaylightTime, UBool expInDaylightTime, UDate expZoneOffset, UDate expDSTOffset)
+{
+    UnicodeString str;
+    UErrorCode status = U_ZERO_ERROR;
+    logln("-- Verifying time " + dateToString(d) + " in zone " + time_zone->getID(str));
+    if (time_zone->inDaylightTime(d, status) == expInDaylightTime)
+        logln(UnicodeString("PASS: inDaylightTime = ") + (time_zone->inDaylightTime(d, status)?"true":"false"));
+    else 
+        dataerrln(UnicodeString("FAIL: inDaylightTime = ") + (time_zone->inDaylightTime(d, status)?"true":"false"));
+    if (failure(status, "TimeZone::inDaylightTime", TRUE)) 
+        return;
+    if (time_zone->useDaylightTime() == expUseDaylightTime)
+        logln(UnicodeString("PASS: useDaylightTime = ") + (time_zone->useDaylightTime()?"true":"false"));
+    else 
+        dataerrln(UnicodeString("FAIL: useDaylightTime = ") + (time_zone->useDaylightTime()?"true":"false"));
+    if (time_zone->getRawOffset() == expZoneOffset) 
+        logln(UnicodeString("PASS: getRawOffset() = ") + (expZoneOffset / ONE_HOUR));
+    else
+        dataerrln(UnicodeString("FAIL: getRawOffset() = ") + (time_zone->getRawOffset() / ONE_HOUR) + ";  expected " + (expZoneOffset / ONE_HOUR));
+    
+    GregorianCalendar *gc = new GregorianCalendar(time_zone->clone(), status);
+    gc->setTime(d, status);
+    if (failure(status, "GregorianCalendar::setTime")) return;
+    int32_t offset = time_zone->getOffset((uint8_t)gc->get(UCAL_ERA, status),
+        gc->get(UCAL_YEAR, status), gc->get(UCAL_MONTH, status),
+        gc->get(UCAL_DATE, status), (uint8_t)gc->get(UCAL_DAY_OF_WEEK, status),
+        ((gc->get(UCAL_HOUR_OF_DAY, status) * 60 + gc->get(UCAL_MINUTE, status)) * 60 + gc->get(UCAL_SECOND, status)) * 1000 + gc->get(UCAL_MILLISECOND, status),
+        status);
+    if (failure(status, "GregorianCalendar::get")) return;
+    if (offset == expDSTOffset) logln(UnicodeString("PASS: getOffset() = ") + (offset / ONE_HOUR));
+    else dataerrln(UnicodeString("FAIL: getOffset() = ") + (offset / ONE_HOUR) + "; expected " + (expDSTOffset / ONE_HOUR));
+    delete gc;
+}
+ 
+// -------------------------------------
+/**
+    * Check that the given year/month/dom/hour maps to and from the
+    * given epochHours.  This verifies the functioning of the
+    * calendar and time zone in conjunction with one another,
+    * including the calendar time->fields and fields->time and
+    * the time zone getOffset method.
+    *
+    * @param epochHours hours after Jan 1 1970 0:00 GMT.
+    */
+void TimeZoneBoundaryTest::verifyMapping(Calendar& cal, int year, int month, int dom, int hour,
+                    double epochHours) {
+    double H = 3600000.0;
+    UErrorCode status = U_ZERO_ERROR;
+    cal.clear();
+    cal.set(year, month, dom, hour, 0, 0);
+    UDate e = cal.getTime(status)/ H;
+    UDate ed = (epochHours * H);
+    if (e == epochHours) {
+        logln(UnicodeString("Ok: ") + year + "/" + (month+1) + "/" + dom + " " + hour + ":00 => " +
+                e + " (" + ed + ")");
+    } else {
+        dataerrln(UnicodeString("FAIL: ") + year + "/" + (month+1) + "/" + dom + " " + hour + ":00 => " +
+                e + " (" + (e * H) + ")" +
+                ", expected " + epochHours + " (" + ed + ")");
+    }
+    cal.setTime(ed, status);
+    if (cal.get(UCAL_YEAR, status) == year &&
+        cal.get(UCAL_MONTH, status) == month &&
+        cal.get(UCAL_DATE, status) == dom &&
+        cal.get(UCAL_MILLISECONDS_IN_DAY, status) == hour * 3600000) {
+        logln(UnicodeString("Ok: ") + epochHours + " (" + ed + ") => " +
+                cal.get(UCAL_YEAR, status) + "/" +
+                (cal.get(UCAL_MONTH, status)+1) + "/" +
+                cal.get(UCAL_DATE, status) + " " +
+                cal.get(UCAL_MILLISECOND, status)/H);
+    } else {
+        dataerrln(UnicodeString("FAIL: ") + epochHours + " (" + ed + ") => " +
+                cal.get(UCAL_YEAR, status) + "/" +
+                (cal.get(UCAL_MONTH, status)+1) + "/" +
+                cal.get(UCAL_DATE, status) + " " +
+                cal.get(UCAL_MILLISECOND, status)/H +
+                ", expected " + year + "/" + (month+1) + "/" + dom +
+                " " + hour);
+    }
+}
+
+/**
+ * Test the behavior of SimpleTimeZone at the transition into and out of DST.
+ * Use a binary search to find boundaries.
+ */
+void
+TimeZoneBoundaryTest::TestBoundaries()
+{
+    UErrorCode status = U_ZERO_ERROR;
+    TimeZone* pst = TimeZone::createTimeZone("PST");
+    Calendar* tempcal = Calendar::createInstance(pst, status);
+    if(U_SUCCESS(status)){
+        verifyMapping(*tempcal, 1997, Calendar::APRIL, 3,  0, 238904.0);
+        verifyMapping(*tempcal, 1997, Calendar::APRIL, 4,  0, 238928.0);
+        verifyMapping(*tempcal, 1997, Calendar::APRIL, 5,  0, 238952.0);
+        verifyMapping(*tempcal, 1997, Calendar::APRIL, 5, 23, 238975.0);
+        verifyMapping(*tempcal, 1997, Calendar::APRIL, 6,  0, 238976.0);
+        verifyMapping(*tempcal, 1997, Calendar::APRIL, 6,  1, 238977.0);
+        verifyMapping(*tempcal, 1997, Calendar::APRIL, 6,  3, 238978.0);
+    }else{
+        dataerrln("Could not create calendar. Error: %s", u_errorName(status));
+    }
+    TimeZone* utc = TimeZone::createTimeZone("UTC");
+    Calendar* utccal =  Calendar::createInstance(utc, status);
+    if(U_SUCCESS(status)){
+        verifyMapping(*utccal, 1997, Calendar::APRIL, 6, 0, 238968.0);
+    }else{
+        dataerrln("Could not create calendar. Error: %s", u_errorName(status));
+    }
+    TimeZone* save = TimeZone::createDefault();
+    TimeZone::setDefault(*pst);
+   
+    if (tempcal != NULL) { 
+        // DST changeover for PST is 4/6/1997 at 2 hours past midnight
+        // at 238978.0 epoch hours.
+        tempcal->clear();
+        tempcal->set(1997, Calendar::APRIL, 6);
+        UDate d = tempcal->getTime(status);
+
+        // i is minutes past midnight standard time
+        for (int i=-120; i<=180; i+=60)
+        {
+            UBool inDST = (i >= 120);
+            tempcal->setTime(d + i*60*1000, status);
+            verifyDST(tempcal->getTime(status),pst, TRUE, inDST, -8*ONE_HOUR,inDST ? -7*ONE_HOUR : -8*ONE_HOUR);
+        }
+    }
+    TimeZone::setDefault(*save);
+    delete save;
+    delete utccal;
+    delete tempcal;
+
+#if 1
+    {
+        logln("--- Test a ---");
+        UDate d = date(97, UCAL_APRIL, 6);
+        TimeZone *z = TimeZone::createTimeZone("PST");
+        for (int32_t i = 60; i <= 180; i += 15) {
+            UBool inDST = (i >= 120);
+            UDate e = d + i * 60 * 1000;
+            verifyDST(e, z, TRUE, inDST, - 8 * ONE_HOUR, inDST ? - 7 * ONE_HOUR: - 8 * ONE_HOUR);
+        }
+        delete z;
+    }
+#endif
+#if 1
+    {
+        logln("--- Test b ---");
+        TimeZone *tz;
+        TimeZone::setDefault(*(tz = TimeZone::createTimeZone("PST")));
+        delete tz;
+        logln("========================================");
+        findDaylightBoundaryUsingDate(date(97, 0, 1), "PST", PST_1997_BEG);
+        logln("========================================");
+        findDaylightBoundaryUsingDate(date(97, 6, 1), "PDT", PST_1997_END);
+    }
+#endif
+#if 1
+    {
+        logln("--- Test c ---");
+        logln("========================================");
+        TimeZone* z = TimeZone::createTimeZone("Australia/Adelaide");
+        findDaylightBoundaryUsingTimeZone(date(97, 0, 1), TRUE, 859653000000.0, z);
+        logln("========================================");
+        findDaylightBoundaryUsingTimeZone(date(97, 6, 1), FALSE, 877797000000.0, z);
+        delete z;
+    }
+#endif
+#if 1
+    {
+        logln("--- Test d ---");
+        logln("========================================");
+        findDaylightBoundaryUsingTimeZone(date(97, 0, 1), FALSE, PST_1997_BEG);
+        logln("========================================");
+        findDaylightBoundaryUsingTimeZone(date(97, 6, 1), TRUE, PST_1997_END);
+    }
+#endif
+#if 0
+    {
+        logln("--- Test e ---");
+        TimeZone *z = TimeZone::createDefault();
+        logln(UnicodeString("") + z->getOffset(1, 97, 3, 4, 6, 0) + " " + date(97, 3, 4));
+        logln(UnicodeString("") + z->getOffset(1, 97, 3, 5, 7, 0) + " " + date(97, 3, 5));
+        logln(UnicodeString("") + z->getOffset(1, 97, 3, 6, 1, 0) + " " + date(97, 3, 6));
+        logln(UnicodeString("") + z->getOffset(1, 97, 3, 7, 2, 0) + " " + date(97, 3, 7));
+        delete z;
+    }
+#endif
+}
+ 
+// -------------------------------------
+ 
+void
+TimeZoneBoundaryTest::testUsingBinarySearch(SimpleTimeZone* tz, UDate d, UDate expectedBoundary)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    UDate min = d;
+    UDate max = min + SIX_MONTHS;
+    UBool startsInDST = tz->inDaylightTime(d, status);
+    if (failure(status, "SimpleTimeZone::inDaylightTime", TRUE)) return;
+    if (tz->inDaylightTime(max, status) == startsInDST) {
+        errln("Error: inDaylightTime(" + dateToString(max) + ") != " + ((!startsInDST)?"true":"false"));
+    }
+    if (failure(status, "SimpleTimeZone::inDaylightTime")) return;
+    while ((max - min) > INTERVAL) {
+        UDate mid = (min + max) / 2;
+        if (tz->inDaylightTime(mid, status) == startsInDST) {
+            min = mid;
+        }
+        else {
+            max = mid;
+        }
+        if (failure(status, "SimpleTimeZone::inDaylightTime")) return;
+    }
+    logln("Binary Search Before: " + showDate(min));
+    logln("Binary Search After:  " + showDate(max));
+    UDate mindelta = expectedBoundary - min;
+    UDate maxdelta = max - expectedBoundary;
+    if (mindelta >= 0 &&
+        mindelta <= INTERVAL &&
+        maxdelta >= 0 &&
+        maxdelta <= INTERVAL) logln(UnicodeString("PASS: Expected boundary at ") + expectedBoundary);
+    else errln(UnicodeString("FAIL: Expected boundary at ") + expectedBoundary);
+}
+ 
+// -------------------------------------
+ 
+/**
+ * Test the handling of the "new" rules; that is, rules other than nth Day of week.
+ */
+void
+TimeZoneBoundaryTest::TestNewRules()
+{
+#if 1
+    {
+        UErrorCode status = U_ZERO_ERROR;
+        SimpleTimeZone *tz;
+        logln("-----------------------------------------------------------------");
+        logln("Aug 2ndTues .. Mar 15");
+        tz = new SimpleTimeZone(- 8 * (int32_t)ONE_HOUR, "Test_1", UCAL_AUGUST, 2, UCAL_TUESDAY, 2 * (int32_t)ONE_HOUR, UCAL_MARCH, 15, 0, 2 * (int32_t)ONE_HOUR, status);
+        logln("========================================");
+        testUsingBinarySearch(tz, date(97, 0, 1), 858416400000.0);
+        logln("========================================");
+        testUsingBinarySearch(tz, date(97, 6, 1), 871380000000.0);
+        delete tz;
+        logln("-----------------------------------------------------------------");
+        logln("Apr Wed>=14 .. Sep Sun<=20");
+        tz = new SimpleTimeZone(- 8 * (int32_t)ONE_HOUR, "Test_2", UCAL_APRIL, 14, - UCAL_WEDNESDAY, 2 *(int32_t)ONE_HOUR, UCAL_SEPTEMBER, - 20, - UCAL_SUNDAY, 2 * (int32_t)ONE_HOUR, status);
+        logln("========================================");
+        testUsingBinarySearch(tz, date(97, 0, 1), 861184800000.0);
+        logln("========================================");
+        testUsingBinarySearch(tz, date(97, 6, 1), 874227600000.0);
+        delete tz;
+    }
+#endif
+}
+ 
+// -------------------------------------
+ 
+void
+TimeZoneBoundaryTest::findBoundariesStepwise(int32_t year, UDate interval, TimeZone* z, int32_t expectedChanges)
+{
+    UErrorCode status = U_ZERO_ERROR;
+    UnicodeString str;
+    UDate d = date(year - 1900, UCAL_JANUARY, 1);
+    UDate time = d;
+    UDate limit = time + ONE_YEAR + ONE_DAY;
+    UBool lastState = z->inDaylightTime(d, status);
+    if (failure(status, "TimeZone::inDaylightTime", TRUE)) return;
+    int32_t changes = 0;
+    logln(UnicodeString("-- Zone ") + z->getID(str) + " starts in " + year + " with DST = " + (lastState?"true":"false"));
+    logln(UnicodeString("useDaylightTime = ") + (z->useDaylightTime()?"true":"false"));
+    while (time < limit) {
+        d = time;
+        UBool state = z->inDaylightTime(d, status);
+        if (failure(status, "TimeZone::inDaylightTime")) return;
+        if (state != lastState) {
+            logln(UnicodeString(state ? "Entry ": "Exit ") + "at " + d);
+            lastState = state;++changes;
+        }
+        time += interval;
+    }
+    if (changes == 0) {
+        if (!lastState &&
+            !z->useDaylightTime()) logln("No DST");
+        else errln("FAIL: DST all year, or no DST with true useDaylightTime");
+    }
+    else if (changes != 2) {
+        errln(UnicodeString("FAIL: ") + changes + " changes seen; should see 0 or 2");
+    }
+    else if (!z->useDaylightTime()) {
+        errln("FAIL: useDaylightTime false but 2 changes seen");
+    }
+    if (changes != expectedChanges) {
+        dataerrln(UnicodeString("FAIL: ") + changes + " changes seen; expected " + expectedChanges);
+    }
+}
+ 
+// -------------------------------------
+
+/**
+ * This test is problematic. It makes assumptions about the behavior
+ * of specific zones. Since ICU's zone table is based on the Olson
+ * zones (the UNIX zones), and those change from time to time, this
+ * test can fail after a zone table update. If that happens, the
+ * selected zones need to be updated to have the behavior
+ * expected. That is, they should have DST, not have DST, and have DST
+ * -- other than that this test isn't picky. 12/3/99 aliu
+ *
+ * Test the behavior of SimpleTimeZone at the transition into and out of DST.
+ * Use a stepwise march to find boundaries.
+ */
+void
+TimeZoneBoundaryTest::TestStepwise()
+{
+    TimeZone *zone =  TimeZone::createTimeZone("America/New_York");
+    findBoundariesStepwise(1997, ONE_DAY, zone, 2);
+    delete zone;
+    zone = TimeZone::createTimeZone("UTC"); // updated 12/3/99 aliu
+    findBoundariesStepwise(1997, ONE_DAY, zone, 0);
+    delete zone;
+    zone = TimeZone::createTimeZone("Australia/Adelaide");
+    findBoundariesStepwise(1997, ONE_DAY, zone, 2);
+    delete zone;
+}
+
+#endif /* #if !UCONFIG_NO_FORMATTING */