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Test Your Legacy Code

Noel Rappin
November 07, 2011

Test Your Legacy Code

Presented at RubyMidwest, November 2011

Noel Rappin

November 07, 2011
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  1. Oh. My. God. The last person to work on this

    was an idiot Monday, November 7, 11
  2. Shake your fists at the heavens for one minute. Photo

    by Sha Sha Chu http://www.flickr.com/photos/shashachu/88654315/ Monday, November 7, 11
  3. def crazy_insane_method(arg, arg, new_arg = nil) # crazy insane stuff

    # now with new stuff end Monday, November 7, 11
  4. class TestPurchase < Purchase def bang # no-op end end

    user.purchase << TestPurchase.new Monday, November 7, 11
  5. class TestPurchase def bang # no-op end end user.purchase <<

    TestPurchase.new Monday, November 7, 11
  6. class Pebble def initialize(name) @name = name end def method_missing(method_name,

    *args) p "#{method_name}(#{args.join(", ")}) from #{caller_method}" self end end Monday, November 7, 11
  7. def caller_method(depth = 1) parse_caller(caller(depth+1).first).last end def parse_caller(at) if /^(.+?):(\d+)(?::in

    `(.*)')?/ =~ at file = Regexp.last_match[1] line = Regexp.last_match[2].to_i method = Regexp.last_match[3] [file, line, method] end Monday, November 7, 11