title: Faye and Ruby: have Rspec read Faye log or messages
body: <p>How can I get Rspec or even Ruby to read a Faye message? They come through in Faye's log alright, but I can't seem to connect to Faye through Rspec:</p>
  
  <pre><code>it 'gets Faye message' do
    EM.run do
      client = Faye::Client.new('http://localhost:9292/faye')
      sub = client.subscribe('/documents') do |message|
        puts message
      end
  
      sub.callback do |message|
        puts message
      end
    end
  end
  </code></pre>
  
  <p>This just hangs. The messages come through in Faye's log. What am I doing wrong?</p>