Created
June 16, 2009 02:18
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First pass at a more Ruby-like Report class from the example in Design Patterns in Ruby, Chapter 3 [for hashrocket bookclub]
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| class Report | |
| attr_accessor :preamble, :before, :after, :prologue | |
| def initialize | |
| @subject = 'Monthly Report' | |
| @content = ['Things are going', 'Really, really good!'] | |
| end | |
| def generate | |
| [:preamble,:head,:body,:prologue].map do |meth| | |
| send(meth) | |
| end.compact.join("\n") | |
| end | |
| def head | |
| "#{@subject}:" | |
| end | |
| def body | |
| [before, @content.map{ |line| output(line) }, after].join("\n") | |
| end | |
| def output(line) | |
| line | |
| end | |
| end | |
| class HTMLReport < Report | |
| def preamble | |
| '<html>' | |
| end | |
| def head | |
| "<head><title>#{@subject}</title></head>" | |
| end | |
| def before | |
| '<body>' | |
| end | |
| def output(line) | |
| "<p>#{line}</p>" | |
| end | |
| def after | |
| '</body>' | |
| end | |
| def prologue | |
| '</html>' | |
| end | |
| end | |
| if __FILE__ == $0 | |
| require 'rubygems' | |
| require 'spec' | |
| Report.new.generate.should == "Monthly Report:\n\n" \ | |
| "Things are going\n" \ | |
| "Really, really good!\n" | |
| HTMLReport.new.generate.should == "<html>\n" \ | |
| "<head><title>Monthly Report</title></head>\n" \ | |
| "<body>\n" \ | |
| "<p>Things are going</p>\n" \ | |
| "<p>Really, really good!</p>\n" \ | |
| "</body>\n" \ | |
| "</html>" \ | |
| end |
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