stevenbeales / mental-test

class CsvSource

  attr_reader :arrays

  attr_reader :file

  def initialize(file)

    @file = file

  end

  # returns an array of arrays containing file contents

  def read

    raise FileNotFoundException.new I18n.t :file_not_found unless File.exist? file 

    @arrays = CSV.read(file)

  end

  # returns a line delimited single string

  def to_s

    read unless arrays

    arrays.map(&:join).join("\n")

  end

end