This paper presents a testing methodology to apply Behaviour Driven Development
(BDD) techniques while developing Multi-Agent Systems (MAS),
so called BEhavioural Agent Simple Testing (BEAST) methodology. It is
supported by the developed open source framework (BEAST Tool) which
automatically generates test cases skeletons from BDD scenarios specifications.
The developed framework allows testing MASs based on JADE or
JADEX platforms and offers a set of configurable Mock Agents which allow
the execution of tests while the system is under development. BEAST tool
has been validated in the development of a MAS for fault diagnosis in FTTH
(Fiber To The Home) networks.