text: var browserify = require('../');
  var vm = require('vm');
  var test = require('tap').test;
  var through = require('through2');
  
  test('transform errors errback', function (t) {
      t.plan(2);
      
      var b = browserify(__dirname + '/tr/main.js');
      b.transform(function (file) {
          return through(function (buf) {
              this.emit('error', new Error('blah'));
          })
      });
      b.bundle(function (err, src) {
          t.ok(/^blah/.test(err.message));
          t.equal(src, undefined);
      });
  });
  
  test('transform errors propagate', function (t) {
      t.plan(1);
      
      var b = browserify(__dirname + '/tr/main.js');
      b.transform(function (file) {
          return through(function (buf) {
              this.emit('error', new Error('blah'));
          });
      });
      b.bundle().on('error', function (err) {
          t.ok(/^blah/.test(err.message));
      });
  });
  