RedBeanPHP has been tested very well. You can find the test files on github. The complete set of test files for RedBeanPHP is called RedUNIT. RedBeanPHP has been tested with PHP Coverage. With version 3.0 RedBeanPHP has reached 99% test coverage.
To run a unit test pack, type the following command in testing/cli:./start.sh
This will run the tests. To run all mysql tests (same for Postgres,Sqlite):./start.sh Mysql
To run a single test package:./start.sh Base/Graph
Before you run tests yourself you might want to take a look at the test configuration file config/test.ini
RedBeanPHP Easy ORM for PHP © 2013 Gabor de Mooij and the RedBeanPHP community - Licensed New BSD/GPLv2