gistfile1.rb

Test:
route_for(:controller => 'users', :action => 'update', :id => '1', :method => :put).should == "/users/1"

Failure:
Test::Unit::AssertionFailedError in 'UsersController route generation should route users's 'update' action correctly'
The recognized options <{"action"=>"show", "id"=>"1", "controller"=>"users"}> did not match <{"action"=>"update", "id"=>"1", "method"=>:put, "controller"=>"users"}>, difference: <{"action"=>"update", "method"=>:put}>

Routes:
PUT    /users/:id                   {:controller=>"users", :action=>"update"}