ruby-on-rails - 如何使用 RSpec 测试路由约束

Question

鉴于数据库中的几个城市:

City.first.attributes => {:id => 1, :name => 'nyc'}
City.last.attributes =>  {:id => 2, :name => 'boston'}

和一条路线:

match '/:city/*dest' => 'cities#do_something', :constraints => {:city => /#{City.all.map{|c| c.name}.join('|'}/}

(因此约束应评估为:/nyc|boston/)

还有一个规范:

it "recognizes and generates a route for city specific paths" do
  { :put => '/bad-city/some/path' }.should route_to({:controller => "cities", :action => "do_something", :dest => 'some/path', :city => 'bad-city'})
end

我预计会失败。但它过去了。

同样地:

it "doesn't route bad city names" do
  { :put => '/some-bad-city/some/path' }.should_not be_routable
end

在这里，我希望它通过，但它失败了。

规范中似乎忽略了约束，因为匹配的城市与坏城市的行为相同。

这是一个已知问题，还是我遗漏了一些我需要做的事情？

Answer 1

这种方法有效:
在routes.rb

match '/:city/*destination' => 'cities#myaction', :constraints => {:city => /#{City.all.map{|c|c.slug}.join('|')}/}

在规范中:

describe "routing" do
  before(:each) do
    @mock_city = mock_model(City, :id => 42, :slug => 'some-city')
    City.stub!(:find_by_slug => @mock_city, :all => [@mock_city])
    MyApp::Application.reload_routes!
  end

  it "recognizes and generates a route for city specific paths" do
    { :get => '/some-city/some/path' }.should route_to({:controller => "cities", :action => "myaction", :destination => 'some/path', :city => 'some-city'})
  end

  it "rejects city paths for cities that don't exist in the DB" do
    { :get => '/some-bad-city/some/path' }.should_not be_routable
  end
end

最后，我添加了一个观察者来在城市表发生变化时重新加载路线。