fix(ngMock): call $interval callbacks even when invokeApply is false

Make ngMock.$interval behave like ng.$interval

Closes #10032

Author: terite

src/ngMock/angular-mocks.js

@@ -454,17 +454,17 @@ angular.mock.$LogProvider = function() {
  * @returns {promise} A promise which will be notified on each iteration.
  */
 angular.mock.$IntervalProvider = function() {
-  this.$get = ['$rootScope', '$q',
-       function($rootScope,   $q) {
+  this.$get = ['$browser', '$rootScope', '$q', '$$q',
+       function($browser,   $rootScope,   $q,   $$q) {
     var repeatFns = [],
         nextRepeatId = 0,
         now = 0;
 
     var $interval = function(fn, delay, count, invokeApply) {
-      var deferred = $q.defer(),
-          promise = deferred.promise,
-          iteration = 0,
-          skipApply = (angular.isDefined(invokeApply) && !invokeApply);
+      var iteration = 0,
+          skipApply = (angular.isDefined(invokeApply) && !invokeApply),
+          deferred = (skipApply ? $$q : $q).defer(),
+          promise = deferred.promise;
 
       count = (angular.isDefined(count)) ? count : 0;
       promise.then(null, null, fn);
@@ -487,7 +487,11 @@ angular.mock.$IntervalProvider = function() {
           }
         }
 
-        if (!skipApply) $rootScope.$apply();
+        if (skipApply) {
+          $browser.defer.flush();
+        } else {
+          $rootScope.$apply();
+        }
       }
 
       repeatFns.push({

test/ngMock/angular-mocksSpec.js

@@ -321,11 +321,15 @@ describe('ngMock', function() {
         inject(function($interval, $rootScope) {
       var applySpy = spyOn($rootScope, '$apply').andCallThrough();
 
-      $interval(noop, 1000, 0, false);
+      var counter = 0;
+      $interval(function increment() { counter++; }, 1000, 0, false);
+
       expect(applySpy).not.toHaveBeenCalled();
+      expect(counter).toBe(0);
 
       $interval.flush(2000);
       expect(applySpy).not.toHaveBeenCalled();
+      expect(counter).toBe(2);
     }));