module Excon::Test::Plugin::Server::Unicorn

def start(app_str = app, bind_uri = bind)
  bind_uri = URI.parse(bind_uri) unless bind_uri.is_a? URI::Generic
  is_unix_socket = (bind_uri.scheme == "unix")
  if is_unix_socket
    bind_str = bind_uri.to_s
  else
    host = bind_uri.host.gsub(/[\[\]]/, '')
    bind_str = "#{host}:#{bind_uri.port}"
  end
  args = [
    RbConfig.ruby,
    '-S',
    'unicorn',
    '--no-default-middleware',
    '-l',
    bind_str,
    app_str
  ]
  open_process(*args)
  process_stderr = ''
  line = ''
  until line.include?('worker=0 ready')
    line = error.gets
    raise process_stderr if line.nil?
    process_stderr << line
    fatal_time = elapsed_time > timeout
    raise 'unicorn server has taken too long to start' if fatal_time
  end
  true
end