title: Error when I run bundle exec in terminal
body: <p>When I run <code>bundle exec rake test</code> it comes up with an error in the terminal. It can't seem to get passed this step </p>
  
  <pre><code># Running:
  
  .......EEE.......
  
  Finished in 0.420936s, 40.3862 runs/s, 61.7672 assertions/s.
  
    1) Error:
  StaticPagesControllerTest#test_should_get_help:
  NameError: uninitialized constant ApplicationController::TestCase
      app/controllers/static_pages_controller.rb:1:in `&lt;top (required)&gt;'
  
  
    2) Error:
  StaticPagesControllerTest#test_should_get_home:
  NameError: uninitialized constant ApplicationController::TestCase
      app/controllers/static_pages_controller.rb:1:in `&lt;top (required)&gt;'
  
  
    3) Error:
  StaticPagesControllerTest#test_should_get_about:
  NameError: uninitialized constant ApplicationController::TestCase
      app/controllers/static_pages_controller.rb:1:in `&lt;top (required)&gt;'
  
  17 runs, 26 assertions, 0 failures, 3 errors, 0 skips
  </code></pre>
  
  <p>I tried fixing the problem to the code but have not come up with a solution.</p>
  
  <pre><code>class StaticPagesControllerTest &lt; ActionController::TestCase
  
    test "should get home" do
      get :home
      assert_response :success
      assert_select "title", "Home | Ruby on Rails Tutorial Sample App"
    end
  
    test "should get help" do
      get :help
      assert_response :success
      assert_select "title", "Help | Ruby on Rails Tutorial Sample App"
    end
  
    test "should get about" do
      get :about
      assert_response :success
      assert_select "title", "About | Ruby on Rails Tutorial Sample App"
  
    end
  
  end
  </code></pre>