text: var common = require('./_common.js');
  var Test = common.Test;
  var MIME = require('../index.js');
  var namespace = 'MIME.decodeHeaderUnstructured';
  var tests = [
    [
      Buffer.from(
        '\r\n the \r\n\t =?utf-8?B?' +
        Buffer.from('café', 'utf-8').toString('base64') +
        '?= '
      ),
      ' the \t café ',
      null
    ]
  ];
  tests.forEach(
    function(test) {
      try {
        var actual = MIME.decodeHeaderUnstructured(test[0]);
        var actualError = null;
      } catch (error) {
        var actual = null;
        var actualError = error.message;
      }
      Test.equal(actualError, test[2], namespace, 'error');
      Test.equal(actual, test[1], namespace, 'value');
    }
  );
  