class g:Matchers
  def initialize()
    self.matchers = {}
  end

  defm load_defaults()
    matcher = new EqualityMatcher()
    self.define_pair('to_equal', 'to_not_equal', matcher)
    self.define_pair('to_eq', 'to_neq', matcher)

    matcher = new BooleanMatcher()
    self.define_pair('to_be_true', 'to_be_false', matcher)
    self.define_pair('to_be_ok', 'to_not_be_ok', matcher)

    matcher = new ExistanceMatcher()
    self.define_pair('to_exist', 'to_not_exist', matcher)

    matcher = new AboveMatcher()
    self.define_pair('to_be_above', 'to_not_be_above', matcher)
    self.define_pair('to_be_gt', 'to_not_be_gt', matcher)

    matcher = new BelowMatcher()
    self.define_pair('to_be_below', 'to_not_be_below', matcher)
    self.define_pair('to_be_lt', 'to_not_be_lt', matcher)

    matcher = new BetweenMatcher()
    self.define_pair('to_be_between', 'to_not_be_between', matcher)

    matcher = new LengthMatcher()
    self.define_pair('to_have_length', 'to_not_have_length', matcher)

    matcher = new AtleastMatcher()
    self.define_pair('to_be_at_least', 'to_not_be_at_least', matcher)
    self.define_pair('to_be_gte', 'to_not_be_gte', matcher)

    matcher = new AtmostMatcher()
    self.define_pair('to_be_at_most', 'to_not_be_at_most', matcher)
    self.define_pair('to_be_lte', 'to_not_be_lte', matcher)

    matcher = new WithinMatcher()
    self.define_pair('to_be_within', 'to_not_be_within', matcher)

    matcher = new RegExpMatcher()
    self.define_pair('to_match', 'to_not_match', matcher)
    self.define_pair('to_have_string', 'to_not_have_string', matcher)

    matcher = new DictKeyMatcher()
    self.define_pair('to_have_key', 'to_not_have_key', matcher)
  end

  defm get_match_items()
    return values(self.matchers)
  end

  defm get_match_item(name)
    return self.matchers[name]
  end

  defm define_single(name, matcher)
    item = new MatchItem(name, matcher)
    self.matchers[name] = item
  end

  defm define_pair(ok_name, not_ok_name, matcher)
    ok_item = new MatchItem(ok_name, matcher, false)
    not_ok_item = new MatchItem(not_ok_name, matcher, true)

    self.matchers[ok_name] = ok_item
    self.matchers[not_ok_name] = not_ok_item
  end

end