class Document
attr_reader :title, :text
attr_accessor :formatter
def initialize(formatter)
@title = 'Document'
@text = ['Things are going', ' well.']
@formatter = formatter
end
def output_report
@formatter.output_report(self)
end
end
class Formatter
def output_report(context)
raise 'Abstract method called'
end
end
class HTMLFormatter < Formatter
def output_report(context)
puts('')
puts(' ')
puts(" #{context.title} ")
puts(' ')
puts(' ')
context.text.each do |line|
puts(" #{line}
")
end
puts(' ')
puts('')
end
end