should "update password when given valid perishable token" do
  user = Factory.build(:user_valid, :perishable_token => "1234567890")
  User.stubs(:find_by_perishable_token => user)
  user.stubs(save)

  put :update, :user  => { :password => "testtest" },
               :token => user.perishable_token

  User.should have_received(:find_by_perishable_token).
              with(user.perishable_token)
  user.should have_received(:save)
end