Karma with support for test all and test module

gulpfile.js

/**
 * Assuming karma.conf.js like:
 * ====================================
 * module.exports = function (config) {
   config.set({
     files: [
      'my',
      'required',
      'files'
     ]
   });
 };
 * ====================================
**/

// Use Minimist to parse CLI args
var argv = minimist(process.argv.slice(2));

// Get Config
var KarmaSettings;
var KarmaStub = {
  set: function (config) {
    KarmaSettings = config;
  }
};
require('./karma.conf.js')(KarmaStub);

// The actual Gulp task.
gulp.task('test', function () {
  if (argv.m) {
    KarmaSettings.files.pop(); // Pop last index which should be the one including the spec files.
    KarmaSettings.files.push(path.join('src', argv.m, '**', '*.spec.js'));
  } else {
    // Leave settings as is: with run all tests.
  }
  
  new KarmaServer({
    configFile: './karma.conf.js',
    files: KarmaSettings.files
  }).start();
});