Adds timing to ActiveSupport::TestCase

test_helper.rb

# snip
Spork.prefork do
  #snip
  class ActiveSupport::TestCase
    setup :mark_test_start_time
    teardown :record_test_duration

    def mark_test_start_time
      @start_time = Time.now
    end

    def record_test_duration
      File.open("#{Rails.root}/tmp/test_metrics.csv", "a") do |file|
        file.puts "#{self.class},#{method_name.gsub(/,/, '_')},#{Time.now - @start_time}"
      end
    end
  end
# snip
end
# snip