[jira] [Commented] (LANG-538) DateFormatUtils.format does not correctly change Calendar TimeZone in certain situations

["Christian P. MOMON (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LANG-538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13766132#comment-13766132 ] 

Christian P. MOMON commented on LANG-538:
-----------------------------------------

Hi. This bug is existing in version 3.3.1. The "assertEquals("dateTime", dateTime, format.format(cal));" from the test above returns the following error:
org.junit.ComparisonFailure: dateTime expected:<2009-10-16T[16]:42:16.000Z> but was:<2009-10-16T[08]:42:16.000Z>

Reproduced whit Sun Java version: 1.6.0_45 and 1.7.0_21 on Fedora 17 (Linux 3.9.10-100.fc17.i686.PAE).

I will try to clone this issue.



                
> DateFormatUtils.format does not correctly change Calendar TimeZone in certain situations
> ----------------------------------------------------------------------------------------
>
>                 Key: LANG-538
>                 URL: https://issues.apache.org/jira/browse/LANG-538
>             Project: Commons Lang
>          Issue Type: Bug
>          Components: lang.time.*
>    Affects Versions: 2.4
>         Environment: Sun JDK6, RHEL 5.3
>            Reporter: Jeff Peterson
>             Fix For: 2.5
>
>
> If a Calendar object is constructed in certain ways a call to Calendar.setTimeZone does not correctly change the Calendars fields.  Calling Calenar.getTime() seems to fix this problem.  While this is probably a bug in the JDK, it would be nice if DateFormatUtils was smart enough to detect/resolve this problem.
> For example, the following unit test fails:
> {noformat}
>   public void testFormat_CalendarIsoMsZulu() {
>     final String dateTime = "2009-10-16T16:42:16.000Z";
>     // more commonly constructed with: cal = new GregorianCalendar(2009, 9, 16, 8, 42, 16)
>     // for the unit test to work in any time zone, constructing with GMT-8 rather than default locale time zone
>     GregorianCalendar cal = new GregorianCalendar(TimeZone.getTimeZone("GMT-8"));
>     cal.clear();
>     cal.set(2009, 9, 16, 8, 42, 16);
>     FastDateFormat format = FastDateFormat.getInstance("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", TimeZone.getTimeZone("GMT"));
>     assertEquals("dateTime", dateTime, format.format(cal));
>   }
> {noformat}
> However, this unit test passes:
> {noformat}
>   public void testFormat_CalendarIsoMsZulu() {
>     final String dateTime = "2009-10-16T16:42:16.000Z";
>     GregorianCalendar cal = new GregorianCalendar(TimeZone.getTimeZone("GMT-8"));
>     cal.clear();
>     cal.set(2009, 9, 16, 8, 42, 16);
>     cal.getTime();
>     FastDateFormat format = FastDateFormat.getInstance("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", TimeZone.getTimeZone("GMT"));
>     assertEquals("dateTime", dateTime, format.format(cal));
>   }
> {noformat}

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