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https://issues.apache.org/jira/browse/TEXT-111?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bruno P. Kinoshita resolved TEXT-111.
-------------------------------------
Resolution: Fixed
Assignee: Bruno P. Kinoshita
Fix Version/s: 1.7
> WordUtils.wrap must calculate offset increment from wrapOn pattern length
> -------------------------------------------------------------------------
>
> Key: TEXT-111
> URL: https://issues.apache.org/jira/browse/TEXT-111
> Project: Commons Text
> Issue Type: Bug
> Affects Versions: 1.2
> Reporter: Michael Keppler
> Assignee: Bruno P. Kinoshita
> Priority: Major
> Fix For: 1.7
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> WordUtils.wrap(...) allows to specify the "wrapOn" regular expression to be
> used as breakable characters. If this pattern is a zero width assertion or is
> longer than 1 charachter, then the output is wrong because the wrapping
> algorithm always skips one character (assuming the line break character has a
> width of 1).
> Example failing test:
> {code:java}
> assertThat(WordUtils.wrap("abcdef", 2, "\n", false,
> "(?=d)")).isEqualTo("abc\ndef");
> // produces "abc\nef" instead
> {code}
> Fix would be to change the 2 occurences of
> {code:java}
> offset = spaceToWrapAt + 1;
> {code}
> to
> {code:java}
> offset = spaceToWrapAt + matcher.end() - matcher.start();
> {code}
> thereby not advancing 1 character each time, but as many characters as were
> just matched.
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