text: 
  var test = require('tape')
  
  test('ipSet.contains respects ipSet.add', function (t) {
    var ipSet = require('../')()
    var localhost = '127.0.0.1'
  
    t.notOk(ipSet.contains(localhost))
    ipSet.add(localhost)
    t.ok(ipSet.contains(localhost))
    t.end()
  })
  
  // TODO: more thorough unit tests
  
  