TODO TESTS.txt

TODO TESTS:
* builder
    D initialState
    * addDefaultHandler
        * this in fn
        * _onEnter definable if no state requires param
        * handler = string state if no enter params
        * _onExit
        * '*' handler
        * overridable by state
        * transition
        * deferUntilTransition
            * any state
            * one state
            * state A or state B
        * deferAndTransition
    D any state (Record<string, ...>)
    * any handler (Record<string, ...>)
    * addUserDefinedFn
        * this in fn
        D available in initialize fn
    * addInitializeFn
        D this in fn
        D parameters of initialize = constructor arguments
    * namespace
    * events
        * with and without user defined events
        * any event (Record<string, ...>)
        * emit
        * on
            * custom
            * internal event
    * build
        * parameters of handlers
        * this in handlers
* instantiate
    * parameters
    * _onEnter definable if no state requires param
    * handler = string state if no enter params
    * _onExit
    * '*' handler
    * transition
    * deferUntilTransition
        * any state
        * one state
        * state A or state B
    * deferAndTransition