module ActionDispatch::Integration::Runner

def copy_session_variables! #:nodoc:

:nodoc:
test instance.
Copy the instance variables from the current session instance into the 
def copy_session_variables! #:nodoc:
  return unless @integration_session
  %w(controller response request).each do |var|
    instance_variable_set("@#{var}", @integration_session.__send__(var))
  end
end