[selectors] modify workflow selectors: is_in_state, on_transition
- factorize `is_on_state` selector
- add new `on_transition` selector
Especially useful to match pending transitions to enable notifications when
your workflow allows several transition to the same states.
Note that if workflow `change_state` adapter method is used, this selector
will not be triggered.
In debug mode:
These both selectors will check against the entity current workflow if expected
values given in selector argument are valid.
ValueError exception will be raised for unmatching state/transition
names against the current workflow (generic etype workflow).
(check against custom workflow is not implemented)
[MESSAGES CONTROL]
disable-msg = C0301
[VARIABLES]
# Enable / disable this checker
enable-variables = yes
additional-builtins = _, display_name
[BASIC]
required-attributes=
attr-rgx = (w|[a-z_][a-z0-9_]{2,30})
variable-rgx = (w|[a-z_][a-z0-9_]{2,30})$
argument-rgx = (w|[a-z_][a-z0-9_]{2,30})$
[TYPECHECK]
generated-members=debug,info,notice,warning,error,critical,exception