Question

当我在实践中运行它时，它可以工作，但我似乎无法使用rspec为我的路由约束编写一个工作测试。

当测试运行时，会触发约束，但请求参数为空，因此它不会验证并且测试失败。

我正在运行Rails 3.0.9，rspec-rails 2.6.1和rspec 2.6.0。

配置/ routes.rb中

match ":param1-unique-:param2" => "controller#index",
  :constraints => ParamConstraint.new

LIB / param_constraint.rb

class ParamConstraint
  def matches?(request)
    @request ||= request
    valid_param1? && valid_param2?
  end

  def valid_param1?
    @request.params[:param1] == "lorem"
  end

  def valid_param2?
    @request.params[:param2] == "ipsum"
  end
end

规格/路由/ param_constraint_spec.rb

require 'spec_helper'

describe "param constraint routing" do
  it "recognizes route for param1 and param2" do
    { :get => "/lorem-unique-ipsum" }.
      should route_to(
        :controller => "controller",
        :action => "index",
        :param1 => "lorem",
        :param2 => "ipsum"
      )
  end
end

更新

如果我在约束中检查请求，我会得到以下输出：

#<ActionDispatch::Request:0x007fee140ff910 @env={
  "rack.version"=>[1, 1],
  "rack.input"=>#<StringIO:0x007fee1446da48>,
  "rack.errors"=>#<StringIO:0x007fee1446e768>,
  "rack.multithread"=>true,
  "rack.multiprocess"=>true,
  "rack.run_once"=>false,
  "REQUEST_METHOD"=>"GET",
  "SERVER_NAME"=>"example.org",
  "SERVER_PORT"=>"80",
  "QUERY_STRING"=>"",
  "PATH_INFO"=>"/lorem-unique-ipsum",
  "rack.url_scheme"=>"http",
  "HTTPS"=>"off",
  "SCRIPT_NAME"=>"",
  "CONTENT_LENGTH"=>"0"
}>

Answer 1

今天我遇到了同样的问题，正在寻找一个回答我的问题。对于它的价值，我不得不求助于编写请求规范。

context "passing params that satisfy ParamConstraint" do
  before do
    visit "/lorem-unique-ipsum"
  end
  it "should serve up a page with content" do
    # replace this with some assertion that gets satisfied by
    # pages served up when ParamConstraint.new.matches? returns true
    page.should have_selector("html body div#foo")
    page.should_not have_selector("html body div#bar")
  end
 end
context "passing params that DO NOT satisfy ParamConstraint" do
  before do
    visit "/other-unique-other"
  end
  it "should serve up a page with different content" do
    # replace this with some assertion that gets satisfied by
    # pages served up when ParamConstraint.new.matches? returns false
    page.should_not have_selector("html body div#foo")
    page.should have_selector("html body div#bar")
  end
 end

这不能回答你的问题，我认为这是“如何测试路由约束”，因为正确的方法是通过路由规范。但是考虑到当你使用“should route_to”时request.params的工作方式存在这种差距，这是一种解决方法。与路由规范相反，请求规范将正确填充request.params。

Answer 2

相同的问题存在多年后，使用rspec-core 3.4.4，rspec-rails 3.4.2，rails 4.2.6。没有时间深入了解原因......

您可以使用上面建议的请求规范，但不要使用它来测试页面内容。相反，通过检查URL路径转换为请求参数来复制路由测试（route_to）：

RSpec.describe 'routes', type: :request do
  describe '/:slug' do
    it 'routes correctly' do
      get '/test-product-slug'
      expect(request.params).to eq(
        'controller' => 'product',
        'action' => :index,
        'slug' => 'test-product-slug'
      )
    end
  end
end

测试路线时没有请求参数约束

更新

2 个答案: