The test suite now depends on TXL. Since the trend in Ragel is towards
independence of the host-language, tests are now being written in a fictional
mini-language designed for the purpose of testing ragel. The host language
test-cases are then generated using a TXL transformation. This allows one test
case to be run against all host languages in addition to all code generation
styles.

TXL is not open source, but a free download is available from the homepage.

http://www.txl.ca/

-Adrian