A helper to make it easier to test different route configurations. This method temporarily replaces ActionController::Routing::Routes with a new RouteSet instance.

The new instance is yielded to the passed block. Typically the block will create some routes using map.draw { map.connect … }:

with_routing do |set|
  set.draw do |map|
    map.connect ':controller/:action/:id'
      assert_equal(
        ['/content/10/show', {}],
        map.generate(:controller => 'content', :id => 10, :action => 'show')
    end
  end
end

Source Code

# File action_controller/test_process.rb, line 499
def with_routing
  real_routes = ActionController::Routing::Routes
  ActionController::Routing.module_eval { remove_const :Routes }

  temporary_routes = ActionController::Routing::RouteSet.new
  ActionController::Routing.module_eval { const_set :Routes, temporary_routes }

  yield temporary_routes
ensure
  if ActionController::Routing.const_defined? :Routes
    ActionController::Routing.module_eval { remove_const :Routes }
  end
  ActionController::Routing.const_set(:Routes, real_routes) if real_routes
end