module RSpec::Rails::Matchers::HaveExtensions

def description_with_errors_on_extensions
  return "have #{relativities[@relativity]}#{@expected} errors on :#{@args[0]}" if @collection_name == :errors_on
  return "have #{relativities[@relativity]}#{@expected} error on :#{@args[0]}"  if @collection_name == :error_on
  return description_without_errors_on_extensions
end

def failure_message_for_should_with_errors_on_extensions
  return "expected #{relativities[@relativity]}#{@expected} errors on :#{@args[0]}, got #{@actual}" if @collection_name == :errors_on
  return "expected #{relativities[@relativity]}#{@expected} error on :#{@args[0]}, got #{@actual}"  if @collection_name == :error_on
  return failure_message_for_should_without_errors_on_extensions
end