From 3858a1f4d77c2e236f5573ade4d69dcc1fd7be84 Mon Sep 17 00:00:00 2001
From: Stephen Mathieson <me@stephenmathieson.com>
Date: Thu, 7 Jun 2018 04:48:34 -0400
Subject: [PATCH] fix(axe.run): allow returning a Promise in jsdom (#943)

This patch enables `axe.run()` to return a Promise when `window.Promise` is not defined, but there is a Promise implementation in the global scope.

This, while very edge-casey, enables me to run axe in a node process by only importing [`jsdom-global/register`](https://github.com/rstacruz/jsdom-global).
---
 lib/core/public/run.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/core/public/run.js b/lib/core/public/run.js
index 1389734b91..3575f9a27d 100644
--- a/lib/core/public/run.js
+++ b/lib/core/public/run.js
@@ -105,7 +105,7 @@ axe.run = function (context, options, callback) {
 	let reject = noop;
 	let resolve = noop;
 
-	if (window.Promise && callback === noop) {
+	if (typeof Promise === 'function' && callback === noop) {
 		p = new Promise(function (_resolve, _reject) {
 			reject = _reject;
 			resolve = _resolve;
@@ -143,4 +143,4 @@ axe.run = function (context, options, callback) {
  	});
  
  	return p;
-};
\ No newline at end of file
+};