Disable raw filter callbacks in RSpec

callback_disabler.rb

# In spec/support/callback_disabler.rb
module CallbackDisabler
  def self.store_callbacks(model, filters)
    model = constantize(model)
    
    filters.each do |filter|
      model.send("_#{filter}_callbacks").each do |callback|
        stored_callbacks[model] << {
          filter: filter, kind: callback.kind, raw_filter: callback.raw_filter
        }
      end
    end
  end
  
  def self.remove_callbacks(model, filters)
    model = constantize(model)
    
    filters.each do |filter|
      model.reset_callbacks(filter)
    end
  end
  
  def self.reset_callbacks
    stored_callbacks.each do |model, callbacks|
      callbacks.each do |callback|
        model.set_callback(
          callback[:filter], callback[:kind], callback[:raw_filter]
        )
      end
    end
  end
  
  def self.clear
    stored_callbacks.clear
  end
  
  def self.stored_callbacks
    @stored_callbacks ||= Hash.new {|h,k| h[k]=[]}
  end
  
  def self.constantize(model)
    model.to_s.camelize.constantize
  end
end

def disable_callbacks(model, *filters)
  before do    
    CallbackDisabler.store_callbacks(model, filters)
    CallbackDisabler.remove_callbacks(model, filters)
  end
  
  after do
    CallbackDisabler.reset_callbacks
    CallbackDisabler.clear
  end
end

my_class.rb

# Your model
class MyClass
  after_update MyCallback.new

  class MyCallback
    def after_update(instance)
    end
  end
end

my_class_spec.rb

# In your specs, call it like this
describe MyClass do
  disable_callbacks :my_class, :update
  # ...
end