module Spec::Example::ExampleGroupMethods

def include_shared_example_group(shared_example_group)
  case shared_example_group
  when SharedExampleGroup
    include shared_example_group
  else
    unless example_group = SharedExampleGroup.find(shared_example_group)
      raise RuntimeError.new("Shared Example Group '#{shared_example_group}' can not be found")
    end
    include(example_group)
  end
end