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# 2. Include Sweeping module in your controller(s) to have cache_sweeper
#    method to be avaliable, or right in ApplicationController so it will be
#    available in all controllers inheriting from it.

class ApplicationController < ActionController::Base
  include ActionController::Caching::Sweeping

  # ...
end

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Capybara

save_and_open_page

Matchers

have_button(locator)

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require 'celluloid'

class Yo
  include Celluloid
end

puts Celluloid::Actor.all.length

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require 'celluloid'
class MyClass
  include Celluloid

  def do_some
    'yo'
  end
end

a = Myclass.new

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trans = Transaction.filter(~{:somecolumn => nil}, :send_time => nil)

trans.each do |t|
  # do something
end

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require "celluloid"

class MyClass
  include Celluloid

  def initialize
    @a = 0
  end

  def do_something