method

env

rails latest stable - Class: ActionController::AbstractRequest

env()

public

Returns the hash of environment variables for this request, such as { ‘RAILS_ENV’ => ‘production’ }.

# File actionpack/lib/action_controller/request.rb, line 230
    def env
    end

taryneast · Jan 24, 2011

Rails.env

or possibly:

ActionController::TestRequest.new (which has a demo of how to set env vars on a controller test)