UDate TimeZoneRegressionTest::findTransitionStepwise(const SimpleTimeZone& tz, UDate min, UDate max) {
UErrorCode status = U_ZERO_ERROR;
UBool startsInDST = tz.inDaylightTime(min, status);
if (failure(status, "SimpleTimeZone::inDaylightTime")) return 0;
while (min < max) {
if (tz.inDaylightTime(min, status) != startsInDST) {
return min;
}
if (failure(status, "SimpleTimeZone::inDaylightTime")) return 0;
min += (UDate)24*60*60*1000; // one day
}
return 0;
}
UDate TimeZoneRegressionTest::findTransitionBinary(const SimpleTimeZone& tz, UDate min, UDate max) {
UErrorCode status = U_ZERO_ERROR;
UBool startsInDST = tz.inDaylightTime(min, status);
if (failure(status, "SimpleTimeZone::inDaylightTime")) return 0;
if (tz.inDaylightTime(max, status) == startsInDST) {
logln((UnicodeString)"Error: inDaylightTime() != " + ((!startsInDST)?"TRUE":"FALSE"));
return 0;
}
if (failure(status, "SimpleTimeZone::inDaylightTime")) return 0;
while ((max - min) > 100) { // Min accuracy in ms
UDate mid = (min + max) / 2;
if (tz.inDaylightTime(mid, status) == startsInDST) {
min = mid;
} else {
max = mid;
}
if (failure(status, "SimpleTimeZone::inDaylightTime")) return 0;
}
return (min + max) / 2;
}
// {sfb} will this work using a Calendar?
void TimeZoneRegressionTest:: Test4073215()
{
UErrorCode status = U_ZERO_ERROR;
UnicodeString str, str2;
SimpleTimeZone *z = new SimpleTimeZone(0, "GMT");
if (z->useDaylightTime())
errln("Fail: Fix test to start with non-DST zone");
z->setStartRule(UCAL_FEBRUARY, 1, UCAL_SUNDAY, 0, status);
failure(status, "z->setStartRule()");
z->setEndRule(UCAL_MARCH, -1, UCAL_SUNDAY, 0, status);
failure(status, "z->setStartRule()");
if (!z->useDaylightTime())
errln("Fail: DST not active");
GregorianCalendar cal(1997, UCAL_JANUARY, 31, status);
if(U_FAILURE(status)) {
dataerrln("Error creating calendar %s", u_errorName(status));
return;
}
failure(status, "new GregorianCalendar");
cal.adoptTimeZone(z);
SimpleDateFormat sdf((UnicodeString)"E d MMM yyyy G HH:mm", status);
if(U_FAILURE(status)) {
dataerrln("Error creating date format %s", u_errorName(status));
return;
}
sdf.setCalendar(cal);
failure(status, "new SimpleDateFormat");
UDate jan31, mar1, mar31;
UBool indt = z->inDaylightTime(jan31=cal.getTime(status), status);
failure(status, "inDaylightTime or getTime call on Jan 31");
if (indt) {
errln("Fail: Jan 31 inDaylightTime=TRUE, exp FALSE");
}
cal.set(1997, UCAL_MARCH, 1);
indt = z->inDaylightTime(mar1=cal.getTime(status), status);
failure(status, "inDaylightTime or getTime call on Mar 1");
if (!indt) {
UnicodeString str;
sdf.format(cal.getTime(status), str);
failure(status, "getTime");
errln((UnicodeString)"Fail: " + str + " inDaylightTime=FALSE, exp TRUE");
}
cal.set(1997, UCAL_MARCH, 31);
indt = z->inDaylightTime(mar31=cal.getTime(status), status);
failure(status, "inDaylightTime or getTime call on Mar 31");
if (indt) {
errln("Fail: Mar 31 inDaylightTime=TRUE, exp FALSE");
}
/*
cal.set(1997, Calendar::DECEMBER, 31);
UDate dec31 = cal.getTime(status);
failure(status, "getTime");
UDate trans = findTransitionStepwise(*z, jan31, dec31);
logln((UnicodeString)"Stepwise from " +
sdf.format(jan31, str.remove()) + "; transition at " +
(trans?sdf.format(trans, str2.remove()):(UnicodeString)"NONE"));
trans = findTransitionStepwise(*z, mar1, dec31);
logln((UnicodeString)"Stepwise from " +
sdf.format(mar1, str.remove()) + "; transition at " +
(trans?sdf.format(trans, str2.remove()):(UnicodeString)"NONE"));
trans = findTransitionStepwise(*z, mar31, dec31);
logln((UnicodeString)"Stepwise from " +
sdf.format(mar31, str.remove()) + "; transition at " +
(trans?sdf.format(trans, str2.remove()):(UnicodeString)"NONE"));
*/
}