[IO-727] FilenameUtils.directoryContains() and FileUtils.directoryContains() return wrong result when parent and child have the same path prefix

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.12.0
• Component/s: Utilities
• Assignee: Unassigned
• Reporter: Trung Pham
• Created: 26/Mar/21 12:31
• Updated: 26/Sep/21 20:47
• Resolved: 26/Sep/21 14:25

Description

FilenameUtils.directoryContains() and FileUtils.directoryContains() will return `true` with the following input.

canonicalParent: /path/foo
canonicalChild:  /path/foobar

There were several issues on this but the problem still remains.
IO-423 didn't do anything.
IO-466 test case added in 676c03 just happened to passed because the input file didn't exist.
Github PR: https://github.com/apache/commons-io/pull/217