Law of Demeter

DEMETER.rb

def store(model)
  # 99 of 100 times we will only need to call #to_h and be done with model
  persist model.to_h # Breaks demeter's law
  # this usually encourages poking around in the model
  # which is no concern of store
end

def store(record) #decoupled
  persist record #because that's all we want to do.
  # If it doesn't work as expected RTST (Read The Stack Trace)
  # will probably say something like "Cannot find keys? in persist:22"
end

store model.to_h #usage

# Now #store() AND model#to_h() can be tested independently of one another. 
# with def store(model); model.to_h; end 
# an actual model needs to be "let"ed within the context of the store when testing.
# The integration of the two is probably a level up in the abstraction and can be stubbed accordingly.

def Toybox.return(toy)
  fail Exceptions::Forbidden unless toy.child_proofed
  @contents << toy
end

def handle request
  catch :response do
    dispatch request
  end
rescue
  Responses::ServerErrors::Internal.new
end