Fix nightwatchjs#924 Not possible to create custom assertion with no …

…arguments
szah · Apr 28, 2016 · 0b6d3ef · 0b6d3ef
1 parent a78a473
commit 0b6d3ef
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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) {