From c753a02ae7cbabac9f65183caae1129a6e8e7ef2 Mon Sep 17 00:00:00 2001
From: Robert Wagner <rwwagner90@gmail.com>
Date: Sun, 29 Jul 2018 14:36:21 -0400
Subject: [PATCH] Check for owner before calling isGlimmerTwo

Resolves #816
---
 ember_debug/view-debug.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ember_debug/view-debug.js b/ember_debug/view-debug.js
index 19ed2644a8..8fe396d537 100644
--- a/ember_debug/view-debug.js
+++ b/ember_debug/view-debug.js
@@ -153,7 +153,8 @@ export default EmberObject.extend(PortMixin, {
     };
     window.addEventListener('resize', this.resizeHandler);
 
-    if (this.isGlimmerTwo()) {
+    // We do not have an `owner` when testing, so check for an owner here before calling isGlimmerTwo
+    if (this.getOwner() && this.isGlimmerTwo()) {
       this.glimmerTree = new GlimmerTree({
         owner: this.getOwner(),
         retainObject: this.retainObject.bind(this),
@@ -356,7 +357,7 @@ export default EmberObject.extend(PortMixin, {
   },
 
   isGlimmerTwo() {
-    return this.get('namespace.owner').hasRegistration('service:-glimmer-environment');
+    return this.getOwner().hasRegistration('service:-glimmer-environment');
   },
 
   modelForView(view) {