Mocking with WebMock and VCR

em-http-vcr.rb

require 'rubygems'
require 'test/unit'
require 'em-http'
require 'vcr'

VCR.config do |c|
  c.cassette_library_dir = 'fixtures/vcr_cassettes'
  c.http_stubbing_library = :webmock
end

class VCRTest < Test::Unit::TestCase
  def make_http_request(url)
    http = nil
    EventMachine.run do
      http = EventMachine::HttpRequest.new(url).get
      http.callback { EventMachine.stop }
    end
    http
  end

  def test_example_dot_com
    VCR.use_cassette('example', :record => :new_episodes) do
      http = make_http_request("http://example.com/")
      assert_match /You have reached this web page by typing.*example\.com/, http.response
    end
  end
end

Could we see an example of testing the handling of a Errno::ETIMEDOUT?