DemeterCop is a simple tool that let you watch a Ruby object and record which methods and method chains are being called on it.
class Suspicious
def action
['first', 'second']
end
end
suspect = Suspicious.new
watched = DemeterCop.watch(suspect) # No need to assign really, as the same object will be returned
suspect == watched # => true
suspect.action.last.length
DemeterCop.reportWill return (pretty formatted):
{
Suspicious < Object => {
[ :action ] => {
:location => "(irb):21:in `irb_binding'"
},
[ :action, :last ] => {
:location => "(irb):21:in `irb_binding'"
}
}
}
Where keys (like [:action, :last]) are method chains called on the watched object and values are extra information, for example :location for source file call location.