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ICU-5134 regression test case for getOffset issue around the initial zone transition

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X-SVN-Rev: 20086
This commit is contained in:
Yoshito Umaoka 2006-08-17 23:57:32 +00:00
parent 6d9517dc18
commit d383a8f9de
1 changed files with 45 additions and 2 deletions
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47
icu4j/src/com/ibm/icu/dev/test/timezone/TimeZoneRegression.java
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@ -1,6 +1,6 @@
/**
*******************************************************************************
* Copyright (C) 2000-2005, International Business Machines Corporation and *
* Copyright (C) 2000-2006, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
@ -999,6 +999,49 @@ public class TimeZoneRegression extends TestFmwk {
}
}
}
/**
* getOffset returns wrong offset for days in early 20th century
*/
public void TestJ5134() {
GregorianCalendar testCal = (GregorianCalendar)Calendar.getInstance();
TimeZone icuEastern = TimeZone.getTimeZone("America/New_York");
testCal.setTimeZone(icuEastern);
testCal.set(1900, Calendar.JANUARY, 1, 0, 0, 0);
long time = testCal.getTimeInMillis();
int offset = icuEastern.getOffset(time);
if (offset != -18000000) {
errln("FAIL: UTC offset in time zone America/New_York on Jan 1, 1900 -> " + offset);
}
boolean isDst = icuEastern.inDaylightTime(new Date(time));
if (isDst) {
errln("FAIL: DST is observed in time zone America/New_York on Jan 1, 1900");
}
java.util.TimeZone jdkEastern = java.util.TimeZone.getTimeZone("America/New_York");
if (!(jdkEastern instanceof java.util.SimpleTimeZone)) {
// Compare offset and DST observation with JDK and ICU for 50 years since 1900
testCal.add(Calendar.YEAR, 50);
long endTime = testCal.getTimeInMillis();
int jdkOffset;
boolean isDstJdk;
while (time < endTime) {
offset = icuEastern.getOffset(time);
jdkOffset = jdkEastern.getOffset(time);
if (offset != jdkOffset) {
errln("FAIL: Incompatible UTC offset -> JDK:" + jdkOffset + "/ICU:" + offset + " [" + time + "]");
}
Date d = new Date(time);
isDst = icuEastern.inDaylightTime(d);
isDstJdk = jdkEastern.inDaylightTime(d);
if (isDst != isDstJdk) {
errln("FAIL: Incompatible DST -> JDK:" + isDstJdk + "/ICU:" + isDst + " [" + time + "]");
}
time += 24*60*60*1000L; // increment 1 day
}
}
}
}
//eof
//eof