我正在尝试在Rails 3应用程序中首次使用selenium。（我以前在导轨2上使用过它）。我在一个rvm中，它当然有它自己的gemset。

我首先用水豚跑了一个没有selenium的任务：

#./spec/requests/homepage_spec.rb
require 'spec_helper'

describe 'home page', :type => :request do
  it 'should welcome the user' do
    visit '/'
    page.should have_content('Buddy')
  end
end

这样很好。然后，我在describe的选项中添加了“：js => true”选项，这应该使它使用selenium运行（据我所知）。并得到此错误：

 Failure/Error: @page.start_new_browser_session
 WebMock::NetConnectNotAllowedError:
   Real HTTP connections are disabled. Unregistered request: POST http://localhost:4444/selenium-server/driver/ with body 'cmd=getNewBrowserSession&1=%2Afirefox&2=http%3A%2F%2Flocalhost%3A3000&3=&4=' with headers {'Accept'=>'*/*', 'Content-Type'=>'application/x-www-form-urlencoded; charset=utf-8', 'User-Agent'=>'Ruby'}

   You can stub this request with the following snippet:

   stub_request(:post, "http://localhost:4444/selenium-server/driver/").
     with(:body => "cmd=getNewBrowserSession&1=%2Afirefox&2=http%3A%2F%2Flocalhost%3A3000&3=&4=", 
          :headers => {'Accept'=>'*/*', 'Content-Type'=>'application/x-www-form-urlencoded; charset=utf-8', 'User-Agent'=>'Ruby'}).
     to_return(:status => 200, :body => "", :headers => {})

   ============================================================

这是我第一次使用capybara，我认为我的配置有些错误。也许缺少一些必不可少的宝石？我正在关注此博客文章：使用RSpec＆Rails
3的Capybara（和Selenium）：快速教程

有任何想法吗？

PS，这是我的Gemfile内容：

source 'http://rubygems.org'
gem 'rails', '3.0.7'
gem 'haml'
gem 'heroku'
gem "heroku_backup_task"
gem 'authlogic', '3.0.2'
gem 'rails3-generators'
gem 'txtlocal', :git => 'git://github.com/epigenesys/txtlocal.git'
gem 'chronic'
gem 'sqlite3-ruby', :require => 'sqlite3'
gem 'bcrypt-ruby'

group :development, :test do
  gem 'rspec'
  gem 'mocha'
  gem "rspec-rails", "~> 2.4"
  gem "webmock"
  gem 'database_cleaner', '0.5.2'  
  gem 'capybara', :git => 'git://github.com/jnicklas/capybara.git'
  gem 'selenium-client'
end

和我的Gemfile.lock：

GIT
  remote: git://github.com/epigenesys/txtlocal.git
  revision: 66aab6628d4385eda959e4a8bd083cc2c259fea0
  specs:
    txtlocal (0.0.1)
      json

GIT
  remote: git://github.com/jnicklas/capybara.git
  revision: 9cdf015e28637b7b0d94f5a69f9bc3605455ce22
  specs:
    capybara (1.0.0.beta1)
      mime-types (>= 1.16)
      nokogiri (>= 1.3.3)
      rack (>= 1.0.0)
      rack-test (>= 0.5.4)
      selenium-webdriver (~> 0.2.0)
      xpath (~> 0.1.4)

GEM
  remote: http://rubygems.org/
  specs:
    abstract (1.0.0)
    actionmailer (3.0.7)
      actionpack (= 3.0.7)
      mail (~> 2.2.15)
    actionpack (3.0.7)
      activemodel (= 3.0.7)
      activesupport (= 3.0.7)
      builder (~> 2.1.2)
      erubis (~> 2.6.6)
      i18n (~> 0.5.0)
      rack (~> 1.2.1)
      rack-mount (~> 0.6.14)
      rack-test (~> 0.5.7)
      tzinfo (~> 0.3.23)
    activemodel (3.0.7)
      activesupport (= 3.0.7)
      builder (~> 2.1.2)
      i18n (~> 0.5.0)
    activerecord (3.0.7)
      activemodel (= 3.0.7)
      activesupport (= 3.0.7)
      arel (~> 2.0.2)
      tzinfo (~> 0.3.23)
    activeresource (3.0.7)
      activemodel (= 3.0.7)
      activesupport (= 3.0.7)
    activesupport (3.0.7)
    addressable (2.2.5)
    arel (2.0.9)
    authlogic (3.0.2)
      activerecord (~> 3.0.7)
      activerecord (~> 3.0.7)
    bcrypt-ruby (2.1.4)
    builder (2.1.2)
    childprocess (0.1.8)
      ffi (~> 1.0.6)
    chronic (0.3.0)
    configuration (1.2.0)
    crack (0.1.8)
    database_cleaner (0.5.2)
    diff-lcs (1.1.2)
    erubis (2.6.6)
      abstract (>= 1.0.0)
    ffi (1.0.7)
      rake (>= 0.8.7)
    haml (3.1.1)
    heroku (2.1.2)
      launchy (>= 0.3.2)
      rest-client (~> 1.6.1)
      term-ansicolor (~> 1.0.5)
    heroku_backup_task (0.0.5)
      heroku (>= 1.13.7)
      rake
    i18n (0.5.0)
    json (1.5.1)
    json_pure (1.5.1)
    launchy (0.4.0)
      configuration (>= 0.0.5)
      rake (>= 0.8.1)
    mail (2.2.19)
      activesupport (>= 2.3.6)
      i18n (>= 0.4.0)
      mime-types (~> 1.16)
      treetop (~> 1.4.8)
    mime-types (1.16)
    mocha (0.9.12)
    nokogiri (1.4.4)
    polyglot (0.3.1)
    rack (1.2.2)
    rack-mount (0.6.14)
      rack (>= 1.0.0)
    rack-test (0.5.7)
      rack (>= 1.0)
    rails (3.0.7)
      actionmailer (= 3.0.7)
      actionpack (= 3.0.7)
      activerecord (= 3.0.7)
      activeresource (= 3.0.7)
      activesupport (= 3.0.7)
      bundler (~> 1.0)
      railties (= 3.0.7)
    rails3-generators (0.17.4)
      railties (>= 3.0.0)
    railties (3.0.7)
      actionpack (= 3.0.7)
      activesupport (= 3.0.7)
      rake (>= 0.8.7)
      thor (~> 0.14.4)
    rake (0.8.7)
    rest-client (1.6.1)
      mime-types (>= 1.16)
    rspec (2.6.0)
      rspec-core (~> 2.6.0)
      rspec-expectations (~> 2.6.0)
      rspec-mocks (~> 2.6.0)
    rspec-core (2.6.0)
    rspec-expectations (2.6.0)
      diff-lcs (~> 1.1.2)
    rspec-mocks (2.6.0)
    rspec-rails (2.6.0)
      actionpack (~> 3.0)
      activesupport (~> 3.0)
      railties (~> 3.0)
      rspec (~> 2.6.0)
    rubyzip (0.9.4)
    selenium-client (1.2.18)
    selenium-webdriver (0.2.0)
      childprocess (>= 0.1.7)
      ffi (>= 1.0.7)
      json_pure
      rubyzip
    sqlite3 (1.3.3)
    sqlite3-ruby (1.3.3)
      sqlite3 (>= 1.3.3)
    term-ansicolor (1.0.5)
    thor (0.14.6)
    treetop (1.4.9)
      polyglot (>= 0.3.1)
    tzinfo (0.3.27)
    webmock (1.6.2)
      addressable (>= 2.2.2)
      crack (>= 0.1.7)
    xpath (0.1.4)
      nokogiri (~> 1.3)

PLATFORMS
  ruby

DEPENDENCIES
  authlogic (= 3.0.2)
  bcrypt-ruby
  capybara!
  chronic
  database_cleaner (= 0.5.2)
  haml
  heroku
  heroku_backup_task
  mocha
  rails (= 3.0.7)
  rails3-generators
  rspec
  rspec-rails (~> 2.4)
  selenium-client
  sqlite3-ruby
  txtlocal!
  webmock