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|# Finite State Machine for nodejs #|
|+the idea here is to define control flow seperately from IO.|
|+an FSM is a set to of *States*, a set of *Events*, a set of *Transitons*|
|+which define state changes when events occur, and finally a set of *Actions*:|
|+functions which are invoked when a particular transition occurs.|
|+this is currently an experimental project, but the potential benefits include:|
|+ * automatic checking of FSM model, for example, check there is no dead end states,|
|+ and that is it always possible to get from start to finish.|
|+ * easily test each Transition with fixtures, and automaticially check that all transitions have tests.|
|+ * when an unexpected error does occur, log the sequence of events which has produced that state.|
|+currently i'm trialing `fsm` in `testbedjs.org`|