module Matchers

  class AutoRequireMatcher
    def initialize(*expected)
      @expected = expected
    end

    def matches?(resource)
      resource_type = resource.class
      configuration = resource_type.instance_variable_get(:@autorequires) || {}
      @autorequires = configuration.inject([]) do |memo, (param, block)|
        memo + resource.instance_eval(&block)
      end
      @autorequires.include?(@expected)
    end
    def failure_message_for_should
      "expected resource autorequires (#{@autorequires.inspect}) to include #{@expected.inspect}"
    end
    def failure_message_for_should_not
      "expected resource autorequires (#{@autorequires.inspect}) to not include #{@expected.inspect}"
    end
  end

    # call-seq:
    #   autorequire :logical_volume, 'mylv'
  def autorequire(type, name)
    AutoRequireMatcher.new(type, name)
  end
    
end