old_contents: var chai = require('chai');
  var should = chai.should();
  var expect = chai.expect;
  var fs = require('fs');
  var exec = require('child_process').exec;
  var spawnSync = require('child_process').spawnSync;
  var spawn = require('child_process').spawn;
  
  require('./test_command_new');
  var SERVICE_TEST = "camera";
  var OPTIONS = { cwd : NAME_APP }
  
  describe('#install service camera', function() {
    var captured_stdout;
    before(function (done) {
        var installServiceCommand = spawn('node', ['../bin/mockapp','install','service',SERVICE_TEST,'--lang','en'], OPTIONS);
        installServiceCommand.stdout.on('data', function (data) {
          captured_stdout = data.toString();
        });
  
        installServiceCommand.stderr.on('data', function (data) {
          captured_stdout = data.toString();
        });
  
        installServiceCommand.on('exit', function (code) {
          done();
        });
    });
    it('should show message about command exec', function() {
        captured_stdout.should.to.contain('Add the service to your controller like');
    });
  
  });
  
new_contents: var chai = require('chai');
  var should = chai.should();
  var expect = chai.expect;
  var fs = require('fs');
  var exec = require('child_process').exec;
  var spawnSync = require('child_process').spawnSync;
  var spawn = require('child_process').spawn;
  
  require('./test_command_new');
  var SERVICE_TEST = "camera";
  var OPTIONS = { cwd : NAME_APP }
  
  describe('#install service camera', function() {
    var captured_stdout;
    before(function (done) {
        var installServiceCommand = spawn('node', ['../bin/mockapp','install','service',SERVICE_TEST,'--lang','en'], OPTIONS);
        installServiceCommand.stdout.on('data', function (data) {
          captured_stdout = data.toString();
        });
  
        installServiceCommand.stderr.on('data', function (data) {
          captured_stdout = data.toString();
        });
  
        installServiceCommand.on('exit', function (code) {
          done();
        });
    });
    it('should show message about command exec', function() {
        captured_stdout.should.to.contain('HomeController.$inject');
    });
  
  });
  
subject: Update test_command_install_service.js