https://bz.apache.org/bugzilla/show_bug.cgi?id=62121

Nick Burch <[email protected]> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

--- Comment #9 from Nick Burch <[email protected]> ---
Generally speaking, we try to have POI mimic Excel where practical/possible. We
have special logic in the Date and Number formatting code, for example, to
handle the edge cases where Excel and Java formatting rules differ. (At a cost
of complexity and performance, sadly)

As a first step here, it would be great if someone could create a small
spreadsheet in Excel, with 3 columns: formula as text, formula, manually typed
in number of what excel renders. Add in a bunch of rows for various power edge
cases

Second step - write a junit unit test that runs over that sample file, and
checks where Apache POI differs from Excel

Third step - write a patch to POI to get it to match Excel in all cases...

Step #1 can be done by anyone - no POI experience needed, just Excel
experience. Step #2 should be possible for anyone with some POI + junit user
experience. #3 may or may not need extensive POI and/or Math skills, but we
need people to tackle the easier #1 and #2 first before we can ponder
proposed/actual fixes for 3!

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