index.js

var through = require('through');
var spawn = require('child_process').spawn;
var gutil = require('gulp-util');

module.exports = function(opt) {
  opt = opt || {};
  opt.config = opt.config || "tests/config";
  opt.workingDir = opt.workingDir || process.cwd();


  function bufferContents(file) {

  }

  function endStream() {
    var child = spawn("node", [process.cwd() + "\\node_modules\\intern\\bin\\intern-client.js", "config=" + opt.config], {cwd: opt.workingDir}),
            stdout = '',
            stderr = '';

    child.stdout.setEncoding('utf8');

    child.stdout.on('data', function (data) {
        stdout += data;
        gutil.log(data);
    });

    child.stderr.setEncoding('utf8');
    child.stderr.on('data', function (data) {
        stderr += data;
        gutil.log(gutil.colors.red(data));
        gutil.beep();
    });

    child.on('close', function(code) {
      if(code !== 0)
        new gutil.PluginError("gulp-intern", "Tests failed");
    });


    this.emit('end');
  }


  return through(bufferContents, endStream);
}