success criterias for audience test

tests/testaudience.js

@@ -1,6 +1,9 @@
 /**
  * @fileoverview Defines tests for audience engagement.
- *
+ * Success criterias:
+ * - Each element from (nodes) array should exist;
+ * - Content of the array element should exist and match the (PATTERN);
+ * - Content of the array element can't be equal to 'N/A'.
  * @see http://google.github.io/styleguide/javascriptguide.xml
  * @see http://developers.google.com/closure/compiler/docs/js-for-compiler
  */
@@ -25,18 +28,20 @@ function testAudience() {
     'audience-engagement-bounce-rate-delta'
   ];
   /** @type {number} */ var length = nodes.length;
+  /** @type {boolean} */ var result = false;
   /** @type {Element} */ var element;
   /** @type {string} */ var content;
 
   for (; length;) {
     element = document.getElementById(nodes[--length]);
     content = element && element.textContent.trim();
 
-    if (!content || !(PATTERN.test(content) || 'N/A' == content)) {
-      return true;
+    if (!content || !PATTERN.test(content) || content == 'N/A') {
+      result = true;
+      break;
     }
   }
-  return false;
+  return result;
 }