如何使用rspec对env ['warden'].user进行ApplicationCable :: Connection测试的存根 [英] How to stub env['warden'].user for ApplicationCable::Connection tests with rspec

问题描述

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

Rails 5.2 I have the following ApplicationCable::Connection ruby file:

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:

I want to test this setup and and using the following RSpec test:

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

Failure/Error: if verified_user = env['warden'].user

NoMethodError:nil:NilClass的未定义方法"[]"

NoMethodError: undefined method `[]' for nil:NilClass

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

So I want to stub out the env['warden'].user code and return an id of 325. I tried the following:

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

但这产生了以下错误:

未定义的局部变量或方法 env'

我如何测试该课程?

推荐答案

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

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