Pervasive Code

If you’re programming in Ruby, then in the list of “should be’s” is “using autotest“, assuming you’re doing automated testing, which of course is a giant “should be”. One problem if you’re using a bunch of gems or Rails is that their code works and yours is broken but the failure stacktraces you’re reading contain their method names mixed in with yours. 99% of the time this is distracting. So, using some code from Faisal that did the same thing with an older version of Autotest but doesn’t work in the latest release, I hacked up the code to help remove unwanted text from Autotest test output. And now I present it to you.

This goes in your .autotest file:

Autotest.add_hook :ran_command do |autotest|
  eliminate_matching = [%r{vendor/plugins/mocha}]
  modify_matching = {%r{/Applications/Locomotive2/.*/gems} => '{gems}'}

  eliminate_matching.each do |u|
    autotest.results = autotest.results.delete_if do |line|
      line.match(u)
    end
  end

  modify_matching.each do |k,v|
    autotest.results.collect! do |line|
      line.gsub(k, v)
    end
  end

  puts autotest.results
end

Note that autotest will still print the unfiltered version; the filtered output will print afterwards, so just ignore the unfiltered stuff.