[COLLECTIONS-769] UnmodifiableMultiValuedMapTest is flaky

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.4
• Fix Version/s: 4.5.0-M1
• Component/s: Map
• Labels: pull-request-available test
• External issue URL: https://github.com/apache/commons-collections/pull/190
• Assignee: Bruno P. Kinoshita
• Reporter: XinT
• Created: 11/Oct/20 23:58
• Updated: 12/Oct/20 03:09
• Resolved: 12/Oct/20 02:26

Description

Several functions in UnmodifiableMultiValuedMapTest (org.apache.commons.collections4.multimap.UnmodifiableMultiValuedMapTest) assert map.toString() is equal to a hard-coded string "

{one=[uno, un], two=[dos, deux], three=[tres, trois]}

", where the map variable is of type MultiValuedMap.

These assertions are flaky because map.toString() can be equal to any one of the 6 strings where "one=[uno, un]", "two=[dos, deux]" and "three=[tres, trois]" are ordered arbitrarily.

The functions with this issue are: 

• testRemoveException()
• testRemoveMappingException()
• testClearException

 

PR: https://github.com/apache/commons-collections/pull/190