chore(testabilityPatch): add jqLiteCacheSize helper

test/.jshintrc

@@ -162,6 +162,7 @@
     "provideLog": false,
     "spyOnlyCallsWithArgs": false,
     "createMockStyleSheet": false,
-    "browserTrigger": false
+    "browserTrigger": false,
+    "jqLiteCacheSize": false
   }
 }

test/helpers/testabilityPatch.js

@@ -118,6 +118,15 @@ function dealoc(obj) {
   }
 }
 
+
+function jqLiteCacheSize() {
+  var size = 0;
+  forEach(jqLite.cache, function() { size++; });
+  return size - jqLiteCacheSize.initSize;
+}
+jqLiteCacheSize.initSize = 0;
+
+
 /**
  * @param {DOMElement} element
  * @param {boolean=} showNgClass