foo.rb

module Spec
  module Example
    class ExampleGroupFactory
      # Used to support spec/unit and spec/integration
      def self.determine_superclass(opts)
        spec_path = opts[:spec_path].to_s.gsub("/spec/unit", "/spec")

        id = if opts[:type]
          opts[:type]
        elsif spec_path =~ /controller/ || spec_path =~ /spec\/integration\/routing_spec/
          :controller
        elsif spec_path =~ /spec\/integration/
          :model
        elsif spec_path =~ /spec(\\|\/)(#{@example_group_types.keys.join('|')})/
          $2 == '' ? nil : $2.to_sym
        end
        get(id)
      end
    end
  end
end