text: var test = require('tape')
  var b64 = require('../lib/b64')
  
  test('convert big data to base64', function (t) {
    var b64str, arr, i, length
    var big = new Uint8Array(64 * 1024 * 1024)
    for (i = 0, length = big.length; i < length; ++i) {
      big[i] = i % 256
    }
    b64str = b64.fromByteArray(big)
    arr = b64.toByteArray(b64str)
    t.ok(equal(arr, big))
    t.end()
  })
  
  function equal (a, b) {
    var i
    var length = a.length
    if (length !== b.length) return false
    for (i = 0; i < length; ++i) {
      if (a[i] !== b[i]) return false
    }
    return true
  }
  