old_contents: var path = require('path'),
      assert = require('yeoman-generator').assert,
      helpers = require('yeoman-generator').test,
      os = require('os');
  
  describe('sails-rest-api:app', function () {
      before(function (done) {
          helpers.run(path.join(__dirname, '../app'))
              .inDir(path.join(os.tmpdir(), './temp-test'))
              .on('end', done);
      });
  
      it('Should properly create root files', function () {
          assert.file([
              '.editorconfig',
              '.gitignore',
              '.sailsrc',
              'app.js',
              'package.json'
          ]);
      });
  });
  
new_contents: var path = require('path'),
      assert = require('yeoman-generator').assert,
      helpers = require('yeoman-generator').test,
      os = require('os');
  
  describe('sails-rest-api:app', function () {
      before(function (done) {
          helpers.run(path.join(__dirname, '../app'))
              .inDir(path.join(os.tmpdir(), './temp-test'))
              .withOptions({skipInstall: true})
              .on('end', done);
      });
  
      it('Should properly create root files', function () {
          assert.file([
              '.editorconfig',
              '.gitignore',
              '.sailsrc',
              'app.js',
              'package.json'
          ]);
      });
  });
  
subject: Add skip install flag to test