routing spec

[eikes]

I would like to write a spec for this routes.rb:

resources :examples, constraints: { id: /[0-9]+/ } do
  member do
    post :save, constraints: CommitParamRouting.new("Save"), action: :save
  end
end

But I can't figure out how. My current attempt in examples_routing_spec.rb looks like this, but its not working:

RSpec.describe ExamplesController, :type => :routing do
  describe "routing" do
    it "routes to #save" do
      expect(:post => "/example/1/save", "commit" => "Save" ).to route_to("example#save", :id => "1")
    end
  end
end

Any ideas?