渲染json状态未授权，接收响应200

Question

我对rails 4.2和rspec-rails 3.3有一些意想不到的行为。我正在使用render发送显式:unauthorized状态代码来控制器：

module Authenticable

  # Devise methods overwrites
  def current_user
    @current_user ||= User.find_by(auth_token: request.headers['Authorization'])
  end

  def authenticate_with_token!
    render json: { errors: "Not authenticated" }, status: :unauthorized unless user_signed_in?
  end

  def user_signed_in?
    current_user.present?
  end
end

失败的rspec是这样的：

require 'spec_helper'

class Authentication
  include Authenticable
end

describe Authenticable do
  let(:authentication) { Authentication.new }
  subject { authentication }

  ......

describe "#authenticate_with_token" do
    before do
      @user = FactoryGirl.create :user
      authentication.stub(:current_user).and_return(nil)
      response.stub(:response_code).and_return(401)
      response.stub(:body).and_return({"errors" => "Not authenticated"}.to_json)
      authentication.stub(:response).and_return(response)
    end

    it "render a json error message" do
      expect(json_response[:errors]).to eql "Not authenticated"
    end

    it { expect(response).to have_http_status(401) } #<--- fails
  end

如果我在失败的测试之前放置byebug，我会清楚地看到响应具有未经过身份验证的＆＃34;消息，但状态设置为200

供参考，这是我的Gemfile

source 'https://rubygems.org'


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.1'
# Use postgresql as the database for Active Record
gem 'pg'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc

# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Unicorn as the app server
gem 'unicorn'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

gem 'activerecord-postgis-adapter'
gem 'rgeo'
gem 'rb-readline'
gem "devise"
gem "responders"

gem 'sabisu_rails', github: "IcaliaLabs/sabisu-rails"
gem 'compass-rails'
gem 'furatto'
gem 'font-awesome-rails'
gem 'simple_form'

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  #gem 'byebug'
    gem 'pry-byebug', '=1.3.3'
    gem 'pry-stack_explorer'
    gem 'pry-rails'
    gem 'pry-remote'

  # Access an IRB console on exception pages or by using <%= console %> in views
  gem 'web-console', '~> 2.0'

  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'

  gem "rspec-rails", "~> 3.3"
end

group :test do

  #gem "shoulda-matchers"
  gem "factory_girl_rails"
  gem 'ffaker'
end