From 0b6d3efa5c4ebd57dca42d83c8cc7d68638ae451 Mon Sep 17 00:00:00 2001
From: Zaharchenko <oleksandr.zakharchenko@engagepoint.com>
Date: Thu, 28 Apr 2016 11:54:46 +0300
Subject: [PATCH] Fix #924 Not possible to create custom assertion with no
 arguments

---
 lib/page-object/command-wrapper.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/page-object/command-wrapper.js b/lib/page-object/command-wrapper.js
index 683def5644..46eeddb89e 100644
--- a/lib/page-object/command-wrapper.js
+++ b/lib/page-object/command-wrapper.js
@@ -68,7 +68,7 @@ module.exports = new (function() {
   function makeWrappedCommand(parent, commandFn, commandName, isChaiAssertion) {
     return function() {
       var args = Array.prototype.slice.call(arguments);
-      var isElementCommand = args[0].toString().indexOf('@') === 0;
+      var isElementCommand = typeof args[0] !== 'undefined' && args[0].toString().indexOf('@') === 0;
       var prevLocateStrategy = parent.client.locateStrategy;
 
       if (isElementCommand) {