Question

Rails 5.2 我有以下ApplicationCable :: Connection红宝石文件：

module ApplicationCable
  class Connection < ActionCable::Connection::Base

    identified_by :current_user

    def connect
      self.current_user = find_verified_user
    end

    private

    def find_verified_user
      if verified_user = env['warden'].user
        verified_user
      else
        message = "The user is not found. Connection rejected."
        logger.add_tags 'ActionCable', message  
        self.transmit error: message 
        reject_unauthorized_connection
      end
    end
  end
end

我要测试此设置并使用以下RSpec测试：

require 'rails_helper.rb'

RSpec.describe ApplicationCable::Connection, type: :channel do

  it "successfully connects" do
    connect "/cable", headers: { "X-USER-ID" => 325 }
    expect(connection.user_id).to eq 325
  end
end

哪个失败：

失败/错误：如果authenticated_user = env ['warden']。user

NoMethodError： nil：NilClass的未定义方法“ []”

因此，我想存出env ['warden']。user代码并返回ID 325。我尝试了以下方法：

allow(env['warden']).to receive(:user).and_return(325)

但这产生了以下错误：

undefined local variable or method环境

如何测试该课程？

Answer 1

尝试一下：

require 'rails_helper.rb'

RSpec.describe ApplicationCable::Connection, type: :channel do

   let(:user)    { instance_double(User, id: 325) }
   let(:env)     { instance_double('env') }

  context 'with a verified user' do

     let(:warden)  { instance_double('warden', user: user) } 

    before do
      allow_any_instance_of(ApplicationCable::Connection).to receive(:env).and_return(env)
      allow(env).to receive(:[]).with('warden').and_return(warden)
    end

    it "successfully connects" do
      connect "/cable", headers: { "X-USER-ID" => 325 }
      expect(connect.current_user.id).to eq 325
    end

  end

  context 'without a verified user' do

    let(:warden)  { instance_double('warden', user: nil) }

    before do
      allow_any_instance_of(ApplicationCable::Connection).to receive(:env).and_return(env)
      allow(env).to receive(:[]).with('warden').and_return(warden)
    end

    it "rejects connection" do
      expect { connect "/cable" }.to have_rejected_connection
    end

  end
end

Answer 2

对于您的问题https://stackoverflow.com/a/17050993/299774

，这是一个很好的解释

问题是关于控制器测试的，但实际上是相似的。

我也不认为您应该在控制器中访问较低级别的env['warden']。如果gem作者决定更改此设置，该怎么办-您必须修复您的应用。可能使用这个配置初始化了看守对象，并且应该有一个可用的对象（运行规范时就没有必要-如上面的链接中所述）。

如何使用rspec对ApplicationCable :: Connection测试存入env ['warden']。user

2 个答案: