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https://issues.apache.org/jira/browse/LOG4J2-1849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15925378#comment-15925378
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shishir chaturvedi commented on LOG4J2-1849:
--------------------------------------------
Hi Remko,
I have added *testFormatLong_goingBackInTime_DST* test case in
*org.apache.logging.log4j.core.util.datetime.FixedDateFormatTest*
which is failing for obvious reasons. Are you referring to this test case. I
would like to contribute test cases similar to this. Please share your feedback.
{code}
/**
* This test case validated date pattern before and after DST
* Base Date : 12 Mar 2017
* Daylight Savings started on : 02:00 AM
*/
@Test
public void testFormatLong_goingBackInTime_DST() {
final Calendar instance = Calendar.getInstance();
instance.set(2017, 2, 12, 2, 0);
final long now = instance.getTimeInMillis();
final long start = now - TimeUnit.HOURS.toMillis(1);
final long end = now + TimeUnit.HOURS.toMillis(1);
for (final FixedFormat format : FixedFormat.values()) {
final SimpleDateFormat simpleDF = new
SimpleDateFormat(format.getPattern(), Locale.getDefault());
final FixedDateFormat customTF = new FixedDateFormat(format,
TimeZone.getDefault());
for (long time = end; time > start; time -= 12345) {
final String actual = customTF.format(time);
final String expected = simpleDF.format(new Date(time));
assertEquals(format + "(" + format.getPattern() + ")" + "/" +
time, expected, actual);
}
}
}
{code}
h4. Output of this testcase,
{color:red}
org.junit.ComparisonFailure: ABSOLUTE(HH:mm:ss,SSS)/1489305654242
Expected :04:00:54,242
Actual :03:00:54,242
{color}
> Broken FixedDateFormat tests when daylight saving time starts
> -------------------------------------------------------------
>
> Key: LOG4J2-1849
> URL: https://issues.apache.org/jira/browse/LOG4J2-1849
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.8.1
> Reporter: Matt Sicker
> Assignee: Remko Popma
>
> Today we started daylight saving time in the US, and the following tests
> failed:
> {noformat}
> Failed tests:
> FixedDateFormatTest.testFormatLong:162 ABSOLUTE(HH:mm:ss,SSS)/1489305608119
> expected:<0[3]:00:08,119> but was:<0[2]:00:08,119>
> FixedDateFormatTest.testFormatLongCharArrayInt:196
> ABSOLUTE(HH:mm:ss,SSS)/1489305607930 expected:<0[3]:00:07,930> but
> was:<0[2]:00:07,930>
> FixedDateFormatTest.testFormatLongCharArrayInt_goingBackInTime:214
> ABSOLUTE(HH:mm:ss,SSS)/1489381194091 expected:<2[3]:59:54,091> but
> was:<2[2]:59:54,091>
> FixedDateFormatTest.testFormatLong_goingBackInTime:178
> ABSOLUTE(HH:mm:ss,SSS)/1489381194072 expected:<2[3]:59:54,072> but
> was:<2[2]:59:54,072>
> {noformat}
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