Ben Caradoc-Davies created GEOS-5067:
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Summary: Random build failure in wms DimensionHelperTest
Key: GEOS-5067
URL: https://jira.codehaus.org/browse/GEOS-5067
Project: GeoServer
Issue Type: Bug
Components: WMS
Affects Versions: 2.2.x, 2.2-beta2
Reporter: Ben Caradoc-Davies
Assignee: Andrea Aime
Attachments: DimensionHelperTest.fails-every-time.patch
DimensionHelperTest.testFormatterFuzz will Randomly fail.
The use of Random() in a unit test causes it to be nondeterministic because the default seed is calculated using the system time. This can be fixed by using Random(long).
The underlying failure is caused by a bona fide bug: a mismatch in the format that appears to occur in year one. This can be seen by applying the attached patch, which increases the number of tests from 1000 to 1000000 and sets the random seed to a fixed value (0, but 1 and 2 also work) so that it fails every time. It also improves failure detail.
{noformat}
junit.framework.ComparisonFailure: java.util.GregorianCalendar[time=?,areFieldsSet=false,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Australia/Perth",offset=28800000,dstSavings=0,useDaylight=false,transitions=20,lastRule=null],firstDayOfWeek=2,minimalDaysInFirstWeek=4,ERA=1,YEAR=1,MONTH=7,WEEK_OF_YEAR=33,WEEK_OF_MONTH=2,DAY_OF_MONTH=16,DAY_OF_YEAR=0,DAY_OF_WEEK=7,DAY_OF_WEEK_IN_MONTH=3,AM_PM=0,HOUR=11,HOUR_OF_DAY=9,MINUTE=39,SECOND=19,MILLISECOND=445,ZONE_OFFSET=28800000,DST_OFFSET=0] expected:<000[1]-12-31T03:39:19.445Z> but was:<000[0]-12-31T03:39:19.445Z>
at junit.framework.Assert.assertEquals(Assert.java:81)
at org.geoserver.wms.capabilities.DimensionHelperTest.testFormatterFuzz(DimensionHelperTest.java:56)
{noformat}
I also suggest testing out to the year 3000 as 2000 is an infamous edge case.
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