A Simple A/B Testing Service

A very simple A/B testing service implemented in Angular – abTestService:

;(function() {
  'use strict';

  angular
    .module('abTest', [])
    .factory('abTestService', abTestService)
  ;


  function abTestService() {
    return {
      pick: pick
    };

    function pick() {
      var i = Math.floor(Math.random() * arguments.length);
      return arguments[i];
    }
  }

})();

abTestService has only one method – pick, which is to evenly pick one from many choices:

// a or b. 50% vs 50% chances
abTestService.pick('a', 'b');

// apple or orange. 50% vs 50%
abTestService.pick('apple', 'orange');

// a, b, or c. 1/3 vs 1/3 vs 1/3
abTestService.pick('a', 'b', 'c');

// a or b. 2/3 vs 1/3
abTestService.pick('a', 'a', 'b');

Here is an example of how to use abTestService with UI Router:

;(function() {
  'use strict';

  angular
    .module('myApp', [
      'abTest',
      'ui.router'
    ])
    .config(configRoute)
  ;


  function configRoute($stateProvider) {
    $stateProvider.state('home', {
      url: '/',
      templateProvider: function(abTestService) { // Inject abTestService
        var result = abTestService.pick('a', 'b'); // Pick a or b

        // home-a.html or home-b.html
        return '<div ng-include="\'app/home-' + result + '.html\'"></div>';
      }
    });
  }

})();

To better explain the logic behind templateProvider, I created this post.