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From "Nikolay Kuznetsov (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-773) regex Patter2Test.testCompile4 is incorrect
Date Wed, 05 Jul 2006 16:53:30 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-773?page=all ]

Nikolay Kuznetsov updated HARMONY-773:
--------------------------------------

    Attachment: Pattern2Test.patch

The attached patch contains fix for the test mentioned in this issue.

Tim: I've mistakenly set this component for thi issues to "Non-bug differences from RI", while
this one
should probably be in "classlib category, could you please change component for this issue
or advise me what to do with it.

> regex Patter2Test.testCompile4 is incorrect
> -------------------------------------------
>
>          Key: HARMONY-773
>          URL: http://issues.apache.org/jira/browse/HARMONY-773
>      Project: Harmony
>         Type: Bug

>   Components: Non-bug differences from RI
>  Environment: All
>     Reporter: Nikolay Kuznetsov
>  Attachments: Pattern2Test.patch
>
> The test Patter2Test.testCompile4 for regex package works incorrectly.
> Input sequence modification after creation of the matcher is invalid action, subsequent
matcher.reset(test)
> call should be used to update matcher with new string:
> ...
> Matcher matcher = pattern.matcher(text);
> ...
> if (found) {
> VVVVVVVVVVVVVVVVVVVVVVVV
>     // modify text
>     text.delete(0, text.length());
>     text.append("Text have been changed.");
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> }
> found = matcher.find();
> The spec does not specifies this case directly, but there are some considerations:
> 1) RI does not support this:
> I can easily modify this testcase to make RI fail with IndexOutOfBounsException(change
"Text have been changed"  to "AA");
> 2) Correct behaviour is not specified:
> What about concurrent modification, what should happen with ranges, should input sequense
be copied of length checks should be performed prior to every input string access operation
and so on. 

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