alternative of http://stephenbartholomew.co.uk/blog/2012/06/07/glass-bottles-and-the-law-of-demeter/ ?

user.rb

class User
  # e.g. stephen.issue_membership ono
  def issue_membership(to_user)
    # do stuff
  end
end

describe User do
  describe "issue_membership" do
    it "issues a membership to a given user"
    it "uses a subscription the user belongs to"
    it "doesn't issue a membership unless the user is admin"
    ...
  end
end