Class: RuboCop::Cop::Style::OnlyOneMethodPerClass

Inherits:
RuboCop::Cop
  • Object
show all
Defined in:
lib/rubo_cop/single_responsibility_principle.rb

Overview

Require that classes implement exactly one method

Instance Method Summary collapse

Instance Method Details

#investigate(processed_source) ⇒ Object 



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# File 'lib/rubo_cop/single_responsibility_principle.rb', line 9

def investigate(processed_source)
  ast = processed_source.ast
  return unless ast

  ast.each_node(:class) do |node|
    # TODO: consider attr_accessors as well
    # TODO: distinguish between public and private
    _, _, body = *node
    count = body.each_child_node.count(&:def_type?)
    next if count == 1

    # TODO: what should the second thing be...?
    msg = "Detected #{count} methods; only one is allowed."
    add_offense(node, :expression, msg)
  end
end