module Shoulda # :nodoc:
  module Matchers
    module ActiveModel # :nodoc:
      class OnlyIntegerMatcher # :nodoc:
        NON_INTEGER_VALUE = 0.1

        def initialize(attribute)
          @attribute = attribute
          @disallow_value_matcher = DisallowValueMatcher.new(NON_INTEGER_VALUE).
            for(attribute).
            with_message(:not_an_integer)
        end

        def matches?(subject)
          @disallow_value_matcher.matches?(subject)
        end

        def with_message(message)
          @disallow_value_matcher.with_message(message)
          self
        end

        def allowed_types
          'integer'
        end

        def failure_message_for_should
          @disallow_value_matcher.failure_message_for_should
        end
      end
    end
  end
end