Jython + JUnit
http://www-106.ibm.com/developerworks/library/j-jythtest.html?ca=dnt-519
e pra quem perdeu, dois ótimos tutoriais:
http://www-106.ibm.com/developerworks/edu/j-dw-java-jython1-i.html
http://www-106.ibm.com/developerworks/edu/j-dw-java-jython2-i.html