[jira] [Commented] (IO-356) CharSequenceInputStream#reset() behaves incorrectly in case when buffer size is not dividable by data size

["Sebb (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IO-356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491621#comment-13491621 ] 

Sebb commented on IO-356:
-------------------------

Thanks for the report; added the test case:

URL: http://svn.apache.org/viewvc?rev=1406222&view=rev
Log:
IO-356 CharSequenceInputStream#reset() behaves incorrectly in case when buffer size is not dividable by data size
Add test case showing the issue

Modified:
    commons/proper/io/trunk/src/test/java/org/apache/commons/io/input/CharSequenceInputStreamTest.java

If the code "bbuf.limit(0);" is added to the reset() method the tests run OK.

However I'm not 100% sure that's the full solution; perhaps others can comment?
                
> CharSequenceInputStream#reset() behaves incorrectly in case when buffer size is not dividable by data size
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: IO-356
>                 URL: https://issues.apache.org/jira/browse/IO-356
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Streams/Writers
>    Affects Versions: 2.4
>            Reporter: Dmitry Katsubo
>         Attachments: CharSequenceInputStreamTest.java
>
>
> The size effect happens when buffer size of input stream is not dividable by requested data size. The bug is hidden in {{CharSequenceInputStream#reset()}} method which should also call (I think) {{bbuf.limit(0)}} otherwise next call to {{CharSequenceInputStream#read()}} will return the remaining tail which {{bbuf}} has accumulated.
> In the attached test case the test fails, if {{dataSize = 13}} (not dividable by 10) and runs OK if {{dataSize = 20}} (dividable by 10).

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