fix(5007): Reduced the amount of digest cycles initiated by the grid.

Part 1: Reduce digest cylces in ui-grid-utils

#5007

Author: Portugal, Marcelo

src/js/core/services/ui-grid-util.js

@@ -619,10 +619,7 @@ module.service('gridUtil', ['$log', '$window', '$document', '$http', '$templateC
     },
 
     isNullOrUndefined: function(obj) {
-      if (obj === undefined || obj === null) {
-        return true;
-      }
-      return false;
+      return (obj === undefined || obj === null);
     },
 
     endsWith: function(str, suffix) {
@@ -831,7 +828,7 @@ module.service('gridUtil', ['$log', '$window', '$document', '$http', '$templateC
         } else {
           s.logWarn('[focus.byId] Element id ' + elementID + ' was not found.');
         }
-      });
+      }, 0, false);
       this.queue.push(promise);
       return promise;
     },
@@ -856,7 +853,7 @@ module.service('gridUtil', ['$log', '$window', '$document', '$http', '$templateC
         if (element){
           element[0].focus();
         }
-      });
+      }, 0, false);
       this.queue.push(promise);
       return promise;
     },
@@ -886,8 +883,8 @@ module.service('gridUtil', ['$log', '$window', '$document', '$http', '$templateC
       };
       this._purgeQueue();
       if (aSync){ //Do this asynchronysly
-        var promise = $timeout(focusBySelector);
-        this.queue.push($timeout(focusBySelector));
+        var promise = $timeout(focusBySelector, 0, false);
+        this.queue.push(promise);
         return promise;
       } else {
         return focusBySelector();

test/unit/core/services/ui-grid-util.spec.js

@@ -6,22 +6,24 @@ describe('ui.grid.utilService', function() {
       $q,
       $interpolateProvider;
 
-  beforeEach(module('ui.grid', function (_$interpolateProvider_) {
-    $interpolateProvider = _$interpolateProvider_;
-  }));
-
-  beforeEach(inject(function(_$rootScope_, _$q_, _gridUtil_, _$window_, _Grid_) {
-    gridUtil = _gridUtil_;
-    $window = _$window_;
-    Grid = _Grid_;
-    $rootScope = _$rootScope_;
-    $q = _$q_;
-  }));
+  beforeEach(function() {
+    module('ui.grid', function (_$interpolateProvider_) {
+      $interpolateProvider = _$interpolateProvider_;
+    });
+
+    inject(function(_$rootScope_, _$q_, _gridUtil_, _$window_, _Grid_) {
+      gridUtil = _gridUtil_;
+      $window = _$window_;
+      Grid = _Grid_;
+      $rootScope = _$rootScope_;
+      $q = _$q_;
+    });
+  });
 
   describe('newId()', function() {
     it('creates a unique id each time it is called', function() {
-      var id1 = gridUtil.newId();
-      var id2 = gridUtil.newId();
+      var id1 = gridUtil.newId(),
+          id2 = gridUtil.newId();
 
       expect(id1).not.toEqual(id2);
     });
@@ -532,12 +534,14 @@ describe('ui.grid.utilService', function() {
       /* Create Button1 */
       button1 = document.createElement('button');
       aButton1 = angular.element(button1);
+      aButton1.attr('id', 'aButton1');
       aButton1.attr('type', 'button');
       // The class is not set here because it is set inside of tests if needed
 
       /* Create Button2 */
       button2 = document.createElement('button');
       aButton2 = angular.element(button1);
+      aButton2.attr('id', 'aButton2');
       aButton2.attr('type', 'button');
       aButton2.addClass(button2class);
 
@@ -557,14 +561,61 @@ describe('ui.grid.utilService', function() {
       expect(element.innerHTML).toEqual(document.activeElement.innerHTML);
     }
 
+    describe('byId', function() {
+      describe('when the grid is not defined', function() {
+        it('should focus on the element with the id passed', function(){
+          gridUtil.focus.byId('aButton2');
+          $timeout.flush();
+
+          expectFocused(button2);
+        });
+      });
+      describe('when the grid is defined', function() {
+        it('should focus on the element with the grid id and the id passed', function(){
+          var gridId = 'gridId';
+
+          aButton2.attr('id', 'gridId-aButton2');
+          gridUtil.focus.byId('aButton2', {id: gridId});
+          $timeout.flush();
+
+          expectFocused(button2);
+        });
+      });
+      describe('when the id passed in is not in the dom', function() {
+        it('should keep focus on the body', function() {
+          gridUtil.focus.byId('notAnElement');
+          $timeout.flush();
+
+          expectFocused(document.body);
+        });
+      });
+    });
     describe('byElement', function(){
-      it('should focus on the element passed', function(){
-        gridUtil.focus.byElement(button1);
-        $timeout.flush();
-        expectFocused(button1);
+      describe('when argument passed is an element', function() {
+        it('should focus on the element passed', function(){
+          gridUtil.focus.byElement(button1);
+          $timeout.flush();
+          expectFocused(button1);
+        });
+      });
+      describe('when argument passed is not an element', function() {
+        it('should keep focus on the body', function(){
+          gridUtil.focus.byElement('');
+          expectFocused(document.body);
+        });
       });
     });
     describe('bySelector', function(){
+      describe('when argument passed is not an element', function() {
+        it('should throw an error', function(done){
+          try {
+            gridUtil.focus.bySelector('');
+          } catch (error) {
+            expect(error.message).toEqual('The parent element is not an element.');
+            done();
+          }
+        });
+      });
       it('should focus on an elment using a selector', function(){
         gridUtil.focus.bySelector(elm, '.' + button2class);
         $timeout.flush();