Rspec 测试条件路由约束

Question

我正在尝试编写一些 rspec 集成测试来测试我的条件路由是否正确路由，但我遇到了很多问题。

在routes.rb中：

root :to => "error#ie6", :constraints => {:user_agent => /MSIE 6/}
root :to => "protocol_sets#index", :constraints => UserRoleConstraint.new(/doctor/i)
root :to => "refill_requests#create", :constraints => UserRoleConstraint.new(/member/i)
root :to => "refill_requests#create", :constraints => {:subdomain => "demo"}
root :to => "site#index"

在spec/requests/homepage_routing_spec.rb中，

require 'spec_helper'

describe "User Visits Homepage" do
  describe "Routings to homepage" do
    it "routes / to site#index when no session information exists" do
      visit root_path      
    end
  end
end

当我尝试运行测试时，出现以下错误。

Failures:

  1) User Visits Homepage Routings to homepage routes / to site#index when no session information exists
     Failure/Error: visit root_path
     NoMethodError:
       undefined method `match' for nil:NilClass
     # :10:in `synchronize'
     # ./spec/requests/homepage_routings_spec.rb:6:in `block (3 levels) in '

Finished in 0.08088 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/requests/homepage_routings_spec.rb:5 # User Visits Homepage Routings to homepage routes / to site#index when no session information exists

通过谷歌搜索，我猜测 rspec/capybara 处理条件路由的方式可能存在问题。

有没有办法用 rspec 和 capybara 来测试路由的约束？

Answer 1

在过去的几天里，这让我抓狂，我在同事的帮助下找到了解决方案。

当使用命名路由约束时，例如示例中的 UserRoleConstraint ，我实际上将约束的 matches? 方法存根到需要它的规范中，即：

describe 'routing' do
  context 'w/o route constraint' do 
    before do
      allow(UserRoleConstraint).to receive(:matches?).and_return { false }
    end

    # tests without the route constraint
  end
  context 'w/ route constraint' do 
    before do
      allow(UserRoleConstraint).to receive(:matches?).and_return { true }
    end
  end

  # tests with the route constraint
end

请注意，要求您具有命名约束，这可能不适用于您的情况。

Answer 2

对于协议约束，您可以只指定带有虚拟域的整个 url。请参阅此答案。