Test helpers to detect & automatically hand-crank your asynchronous Angular test using $rootScope.$digest()

gistfile1.js

// see: http://jsbin.com/gipiyi/1/edit?js,output

// App code:
// =========
var app = angular.module('app', []);

app.factory('HodorFactory', function($q) {  
  return {
    isHodor: function() {
      return $q(function(resolve) {
        resolve('HODOR!');
      });
    }
  };
});

// Test helpers:
// =============
// create a new asyncIt() method that hand-cranks the
// digest loop after calling the test function.
_it = it;
asyncIt = function(description, testFn) {
  _it(description, function(done) {
    testFn(done);
    inject(function($rootScope) {
      $rootScope.$digest();
    });
  });
};
// wrap it() to detect if the test function has a 
// 'done' argument & assumes async if so.
it = function(description, testFn) {
  var isAsync = testFn.length >= 1;
  var fn = isAsync ? asyncIt: _it;
  fn(description, testFn);
};

// Tests:
// ======
describe('HodorFactory', function() {
  var factory;
  
  beforeEach(module('app'));
  beforeEach(inject(function(HodorFactory) {
    factory = HodorFactory;
  }));
  
  it('#isHodor() should respond with HODOR! (it)', function(done) {
    factory.isHodor().then(function(response) {
      expect(response).toEqual('HODOR!');
      done();
    });
  });
  
  asyncIt('#isHodor() should respond with HODOR! (asyncIt)', function(done) {
    factory.isHodor().then(function(response) {
      expect(response).toEqual('HODOR!');
      done();
    });
  });
});