lib/omniauth/strategy.rb
def mock_call!(*)
      return mock_request_call if on_request_path? && OmniAuth.config.allowed_request_methods.include?(request.request_method.downcase.to_sym)
      return mock_callback_call if on_callback_path?

      call_app!
    end
def mock_call!(*)
      return mock_request_call if on_request_path? && OmniAuth.config.allowed_request_methods.include?(request.request_method.downcase.to_sym)
      return mock_callback_call if on_callback_path?

      call_app!
    end
This is called in lieu of the normal request process
 in the event that OmniAuth has been configured to be
 in test mode.