From 12beb77afaa3fe554ebdf97a67615dce05e2299f Mon Sep 17 00:00:00 2001
From: Joffrey JAFFEUX <j.jaffeux@gmail.com>
Date: Tue, 21 Nov 2017 19:08:59 +0100
Subject: [PATCH] FIX: make sure the element exists before calling `off`

This commit fixes an issue happening only when running tests under `/qunit` and not with `rake qunit:test`
---
 .../select-kit/mixins/events.js.es6           | 26 +++++++++++--------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/app/assets/javascripts/select-kit/mixins/events.js.es6 b/app/assets/javascripts/select-kit/mixins/events.js.es6
index fa2bce870f..3d0a04a18a 100644
--- a/app/assets/javascripts/select-kit/mixins/events.js.es6
+++ b/app/assets/javascripts/select-kit/mixins/events.js.es6
@@ -19,18 +19,22 @@ export default Ember.Mixin.create({
       .off("mousedown.select-kit")
       .off("touchstart.select-kit");
 
-    this.$header()
-      .off("focus.select-kit")
-      .off("blur.select-kit")
-      .off("keypress.select-kit")
-      .off("keydown.select-kit");
+    if (this.$header()) {
+      this.$header()
+        .off("focus.select-kit")
+        .off("blur.select-kit")
+        .off("keypress.select-kit")
+        .off("keydown.select-kit");
+    }
 
-    this.$filterInput()
-      .off("change.select-kit")
-      .off("keydown.select-kit")
-      .off("keypress.select-kit")
-      .off("focus.select-kit")
-      .off("focusin.select-kit");
+    if (this.$filterInput()) {
+      this.$filterInput()
+        .off("change.select-kit")
+        .off("keydown.select-kit")
+        .off("keypress.select-kit")
+        .off("focus.select-kit")
+        .off("focusin.select-kit");
+    }
   },
 
   didInsertElement() {