fix(ngAnimate): ensure that animations work when the app is bootstrapped on the document node

Closes angular#11574

Author: matsko

src/ngAnimate/animateQueue.js

@@ -491,6 +491,12 @@ var $$AnimateQueueProvider = ['$animateProvider', function($animateProvider) {
       var animateChildren;
 
       while (parent && parent.length) {
+        if (!rootElementDetected) {
+          // angular doesn't want to attempt to animate elements outside of the application
+          // therefore we need to ensure that the rootElement is an ancestor of the current element
+          rootElementDetected = isMatchingElement(parent, $rootElement);
+        }
+
         var parentNode = parent[0];
         if (parentNode.nodeType !== ELEMENT_NODE) {
           // no point in inspecting the #document element
@@ -515,12 +521,6 @@ var $$AnimateQueueProvider = ['$animateProvider', function($animateProvider) {
         // there is no need to continue traversing at this point
         if (parentAnimationDetected && animateChildren === false) break;
 
-        if (!rootElementDetected) {
-          // angular doesn't want to attempt to animate elements outside of the application
-          // therefore we need to ensure that the rootElement is an ancestor of the current element
-          rootElementDetected = isMatchingElement(parent, $rootElement);
-        }
-
         if (!bodyElementDetected) {
           // we also need to ensure that the element is or will be apart of the body element
           // otherwise it is pointless to even issue an animation to be rendered

test/ngAnimate/animateSpec.js

@@ -10,6 +10,33 @@ describe("animations", function() {
     dealoc(element);
   }));
 
+  it('should allow animations if the application is bootstrapped on the document node', function() {
+    var capturedAnimation;
+
+    module(function($provide) {
+      $provide.factory('$rootElement', function($document) {
+        return $document;
+      });
+      $provide.factory('$$animation', function($$AnimateRunner) {
+        return function() {
+          capturedAnimation = arguments;
+          return new $$AnimateRunner();
+        };
+      });
+    });
+
+    inject(function($animate, $rootScope, $document) {
+      $animate.enabled(true);
+
+      element = jqLite('<div></div>');
+
+      $animate.enter(element, jqLite($document[0].body));
+      $rootScope.$digest();
+
+      expect(capturedAnimation).toBeTruthy();
+    });
+  });
+
   describe('during bootstrap', function() {
     it('should be enabled only after the first digest is fired and the postDigest queue is empty',
       inject(function($animate, $rootScope) {