class Shoulda::Matchers::ActiveModel::NumericalityMatchers::EvenNumberMatcher

def allowed_type_adjective
  'even'
end

def diff_to_compare
  2
end

def disallowed_value
  if @numeric_type_matcher.given_numeric_column?
    NON_EVEN_NUMBER_VALUE
  else
    NON_EVEN_NUMBER_VALUE.to_s
  end
end

def simple_description
  description = ''
  if expects_strict?
    description << 'strictly '
  end
  description +
    "disallow :#{attribute} from being an odd number"
end

def wrap_disallow_value_matcher(matcher)
  matcher.with_message(:even)
end