class Test::Unit::Priority::Checker

def escape_name(name)
  name.gsub(/(?:[: \/!?=])/) do |matched|
    case matched
    when ":"
      "_colon_"
    when " ", "/"
      "_"
    when "!"
      ".destructive"
    when "?"
      ".predicate"
    when "="
      ".equal"
    end
  end
end