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

["Trung Pham (Jira)" <ji...@apache.org>]

Trung Pham created IO-727:
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             Summary: FilenameUtils.directoryContains() and FileUtils.directoryContains() return wrong result when parent and child have the same path prefix
                 Key: IO-727
                 URL: https://issues.apache.org/jira/browse/IO-727
             Project: Commons IO
          Issue Type: Bug
          Components: Utilities
            Reporter: Trung Pham


FilenameUtils.directoryContains() and FileUtils.directoryContains() will return `true` with the following input.
{code:java}
canonicalParent: /path/foo
canonicalChild:  /path/foobar
{code}
There were several issues on this but the problem still remains.
 IO-423 didn't do anything.
 IO-466 test case added in [676c03|https://github.com/apache/commons-io/commit/67325cf97946f053da51dd358a9ffca0a9676c03] just happened to passed because the input file didn't exist.
I'll try to make a PR with tests to demonstrate the bug.



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