module Micronaut
  module Matchers
    
    class RespondTo #:nodoc:

      def initialize(*names)
        @names = names
        @names_not_responded_to = []
      end
      
      def matches?(given)
        @given = given
        @names.each do |name|
          unless given.respond_to?(name)
            @names_not_responded_to << name
          end
        end
        @names_not_responded_to.empty?
      end
      
      def failure_message
        "expected #{@given.inspect} to respond to #{@names_not_responded_to.collect {|name| name.inspect }.join(', ')}"
      end
      
      def negative_failure_message
        "expected #{@given.inspect} not to respond to #{@names.collect {|name| name.inspect }.join(', ')}"
      end
      
      def description
        # Ruby 1.9 returns the same thing for array.to_s as array.inspect, so just use array.inspect here
        "respond to #{@names.inspect}"
      end

    end
    
    # :call-seq:
    #   should respond_to(*names)
    #   should_not respond_to(*names)
    #
    # Matches if the target object responds to all of the names
    # provided. Names can be Strings or Symbols.
    #
    # == Examples
    # 
    def respond_to(*names)
      Matchers::RespondTo.new(*names)
    end

  end
end