title: uninitialized constant Capybara after using Capybara with Rspec
body: <p>I'm learning ruby on rails with the Ruby on Rails Tutorial book online, and I came across this exercise <a href="http://www.railstutorial.org/book/static_pages#code-capybara_dsl" rel="nofollow">http://www.railstutorial.org/book/static_pages#code-capybara_dsl</a></p>
  
  <p>I followed the instruction on adding </p>
  
  <pre><code>RSpec.configure do |config|
    config.include Capybara::DSL
  end
  </code></pre>
  
  <p>to my spec_helper.rb, but now I am receiving the errors </p>
  
  <pre><code>uninitialized constant Capybara &lt;NameError&gt;
  </code></pre>
  
  <p>This is my current spec_helper.rb</p>
  
  <pre><code>require "spec_helper"
  
  RSpec.configure do |config|
    config.include Capybara::DSL
  end
  
  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
  
  describe "Help page" do
  
      it "should have the content 'Help'" do
        visit '/static_pages/help'
        expect(page).to have_content('Help')
      end
  end
  
   describe "About page" do
  
       it "should have the content 'About Us'" do
        visit '/static_pages/about'
        expect(page).to have_content('About Us')
       end
    end
  end
  </code></pre>
  
  <p>What am I doing wrong? did I install the gem incorrectly?</p>
  
  <p>Edit: Not sure if this would help, but here is the failed examples output after I called $ bundle exec rspec spec/requests/static_pages_spec.rb</p>
  
  <pre><code>←[31mrspec ./spec/spec_helper.rb:7←[0m ←[36m# Static pages Home page should have
   the content 'Sample App'←[0m
  ←[31mrspec ./spec/spec_helper.rb:15←[0m ←[36m# Static pages Help page should hav
  e the content 'Help'←[0m
  ←[31mrspec ./spec/spec_helper.rb:23←[0m ←[36m# Static pages About page should ha
  ve the content 'About Us'←[0m
  ←[31mrspec ./spec/requests/static_pages_spec.rb:5←[0m ←[36m# StaticPages GET /st
  atic_pages works! (now write some real specs)←[0m
  </code></pre>