Testing framework to use

Hey Guys, The SQL parser and DBA are becoming more capable, and I need a good way of testing new features and for regressions (especially compatibility with old PHP versions; there have been more than a few surprises for me!). What's the recommended way of writing test cases in PEAR? I've noticed a good number of .phpt files, which seem to be intended for use with the php-test.php script included with PHP itself. This message clued me in about how to use those: http://www.zend.com/lists/php-dev/200203/msg00059.html, but other documentation was hard to find. These files are currently used by DB, various PECL extensions, XML_Parser and XML_RSS. OTOH, there's a, I'm assuming, perfectly fine testing framework with PEAR. It's documented on the pear website pretty well, but only used with MDB and Math_Vector. Which one should I use? I'm testing a lot of different data with a relatively small set of methods and my current tests just use a lot of print_r's. Thanks, Brent