class Gem::FakeFetcher

def request(uri, request_class, last_modified = nil)
  data = find_data(uri)
  body, code, msg = data
  @last_request = request_class.new uri.request_uri
  yield @last_request if block_given?
  response = Net::HTTPResponse.send(:response_class, code.to_s).new("1.0", code.to_s, msg)
  response.instance_variable_set(:@body, body)
  response.instance_variable_set(:@read, true)
  response
end