Assert the number of bouncing elements

challenges/03-front-end-libraries/jquery.json

@@ -1327,6 +1327,7 @@
       ],
       "tests": [
         "assert($(\".target:nth-child(2)\").hasClass(\"animated\") && $(\".target:nth-child(2)\").hasClass(\"bounce\"), 'message: The second element in your <code>target</code> elements should bounce.');",
+        "assert($(\".animated.bounce\").length === 2, 'message: Only two elements should bounce.');",
         "assert(code.match(/\\:nth-child\\(/g), 'message: You should use the <code>&#58;nth-child&#40&#41</code> function to modify these elements.');",
         "assert(code.match(/<button class=\"btn btn-default target\" id=\"target2\">/g), 'message: Only use jQuery to add these classes to the element.');"
       ],