module Test::Unit::Priority

def available_values
  Checker.available_priorities
end

def default
  @@default || :normal
end

def default=(default)
  @@default = default
end

def disable
  @@enabled = false
end

def enable
  require "fileutils"
  require "tmpdir"
  @@enabled = true
end

def enabled?
  @@enabled
end

def included(base)
  base.extend(ClassMethods)
  base.class_eval do
    setup :priority_setup, :before => :prepend
    teardown :priority_teardown, :after => :append
  end
end

def priority_setup(&_)
  return unless Priority.enabled?
  Checker.new(self).setup
end

def priority_teardown
  return unless Priority.enabled?
  Checker.new(self).teardown
end