There are a number of unit tests (including some syntactical ones) that are applied to the code.
Other higher-level tests are conducted with Selenium.
$ make build-unit-tests
Applying unit tests :
$ cd tests/ $ phpunit AllTests.php
Individual test sources are in :
You can download the mozilla plugin available at 
Selenium in Fusionforge tests
Run a single selenium test example :
sh -x tests/scripts/phpunit.sh RPMCentos52Tests.php --wait --filter="ContextualHelp::testContextualHelp"