关于Selenium-Webdriver的RSpec错误

我刚刚创建了应用程序.

这是我在运行’bundle exec rspec spec / requests / static_pages_spec.rb’时所呈现的内容

Corey-M-Kimball:sample_app coreymkimball$bundle exec rspec spec/requests/static_pages_spec.rb
/Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/selenium-webdriver-2.0.0/lib/selenium/webdriver/common/zipper.rb:1:in `require': cannot load such file -- zip/zip (LoadError)
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/selenium-webdriver-2.0.0/lib/selenium/webdriver/common/zipper.rb:1:in `<top (required)>'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/selenium-webdriver-2.0.0/lib/selenium/webdriver/common.rb:9:in `require'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/selenium-webdriver-2.0.0/lib/selenium/webdriver/common.rb:9:in `<top (required)>'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/selenium-webdriver-2.0.0/lib/selenium/webdriver.rb:29:in `require'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/selenium-webdriver-2.0.0/lib/selenium/webdriver.rb:29:in `<top (required)>'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/selenium-webdriver-2.0.0/lib/selenium-webdriver.rb:1:in `require'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/selenium-webdriver-2.0.0/lib/selenium-webdriver.rb:1:in `<top (required)>'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@global/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
    from /Users/coreymkimball/Canvi/sample_app/config/application.rb:12:in `<top (required)>'
    from /Users/coreymkimball/Canvi/sample_app/config/environment.rb:2:in `require'
    from /Users/coreymkimball/Canvi/sample_app/config/environment.rb:2:in `<top (required)>'
    from /Users/coreymkimball/Canvi/sample_app/spec/spec_helper.rb:3:in `require'
    from /Users/coreymkimball/Canvi/sample_app/spec/spec_helper.rb:3:in `<top (required)>'
    from /Users/coreymkimball/Canvi/sample_app/spec/requests/static_pages_spec.rb:1:in `require'
    from /Users/coreymkimball/Canvi/sample_app/spec/requests/static_pages_spec.rb:1:in `<top (required)>'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `load'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `block in load_spec_files'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `each'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `load_spec_files'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/rspec-core-2.13.1/lib/rspec/core/command_line.rb:22:in `run'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/rspec-core-2.13.1/lib/rspec/core/runner.rb:80:in `run'
    from /Users/coreymkimball/.rvm/gems/ruby-2.0.0-p247@railstutorial_rails_4_0/gems/rspec-core-2.13.1/lib/rspec/core/runner.rb:17:in `block in autorun'

我无法弄清楚问题是什么.

规格：

require 'spec_helper'

describe "Static pages" do

  describe "Home page" do

    it "should have the content 'Sample App'" do
      visit '/static_pages/home'
      expect(page).to have_content('Sample App')
    end
  end
end

谢谢.