text: /* */ 
  var test = require('tape'),
      b64 = require('../lib/b64'),
      checks = ['a', 'aa', 'aaa', 'hi', 'hi!', 'hi!!', 'sup', 'sup?', 'sup?!'];
  test('convert to base64 and back', function(t) {
    t.plan(checks.length);
    for (var i = 0; i < checks.length; i++) {
      var check = checks[i],
          b64Str,
          arr,
          str;
      b64Str = b64.fromByteArray(map(check, function(char) {
        return char.charCodeAt(0);
      }));
      arr = b64.toByteArray(b64Str);
      str = map(arr, function(byte) {
        return String.fromCharCode(byte);
      }).join('');
      t.equal(check, str, 'Checked ' + check);
    }
  });
  function map(arr, callback) {
    var res = [],
        kValue,
        mappedValue;
    for (var k = 0,
        len = arr.length; k < len; k++) {
      if ((typeof arr === 'string' && !!arr.charAt(k))) {
        kValue = arr.charAt(k);
        mappedValue = callback(kValue, k, arr);
        res[k] = mappedValue;
      } else if (typeof arr !== 'string' && k in arr) {
        kValue = arr[k];
        mappedValue = callback(kValue, k, arr);
        res[k] = mappedValue;
      }
    }
    return res;
  }
  