title: cucumber and capybara, how to open external url or visit outside url
body: <p>i am using cucumber and capybara. in a rails 3.0.9 platform. i am getting this test case fail:
  log is:</p>
  
  <pre><code>(::) failed steps (::)
  
  No route matches "/wiki/Baltimore_Ravens" (ActionController::RoutingError)
  &lt;internal:prelude&gt;:10:in `synchronize'
  ./features/step_definitions/web_steps.rb:20:in `/^(?:|I )am on (.+)$/'
  features/annotate.feature:7:in `Given I am on a web page'
  
  Failing Scenarios:
  cucumber features/annotate.feature:11 # Scenario: launch annotation/ logged in
  
  6 scenarios (1 failed, 5 skipped)
  63 steps (1 failed, 62 skipped)
  </code></pre>
  
  <p>the file web_steps: got this piece of code:</p>
  
  <pre><code>19 Given /^(?:|I )am on (.+)$/ do |page_name|
  20   visit path_to(page_name)
  21 end
  </code></pre>
  
  <p>the file annotate.feature got this code:</p>
  
  <pre><code>7 Given I am on a web page
  </code></pre>
  
  <p>"a web page" is defined in support/paths.rb as:</p>
  
  <pre><code>when /a web page/
    'http://en.wikipedia.org/wiki/Baltimore_Ravens'
  </code></pre>
  
  <p>obviously this is an external url. i want to open it and capybara and cucumber wont allow me to do it. so, help me find a way to open outside url in cucumber test case!</p>