How to check you WordPress theme before sumitting it to WordPress Themes
If you have had the urge to deveolp a WordPress theme and to submit it to the WordPress theme depository you should do some automated checking so that your chances of approval are increased. I can admit that it is a little bit denting to an ego if you think it is awesome and then you get back a rejection email with a bunch of stuff to fix. Well to maintain the standard of the thems in the repository there are rules and “Rules is Rules Jacko” so you need to fix it.
The easiest way to avoid dissapointment is to do the checks that the moderators do.
First download test data from https://wpcom-themes.svn.automattic.com/demo/test-data.2011-01-17.xml
Import this into your theme and check that all the little things are fixed display correctly e.g. Really long titles.
Once that is done check your compliance with W3C for html and css compliance. You can do this with a neat little WordPress Plugin called Deblogger.
Next you will need to do checks to see if you have all the required standards for a theme. The Theme-Check plugin will sort this out for your. After you run this you will find out if you have included all the required css and updated not depreciated calles in your PHP code.
Lastly get the Log Depreciated Notices plugin which logs the usage of deprecated files, functions, and function arguments, and identifies where the deprecated functionality is being used in your theme.
For the full guide on theme testing you should visit the Theme Development page in the WordPress codex to guide you further.