From ebb93d17ef6d9050deb943acf4ec7657db12734a Mon Sep 17 00:00:00 2001
From: Thomas Gossmann <gossi@users.noreply.github.com>
Date: Wed, 16 May 2018 22:35:16 +0200
Subject: [PATCH] tests for addObserver and removeObserver with optional 3rd
 parameter

---
 types/ember/test/observable.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/types/ember/test/observable.ts b/types/ember/test/observable.ts
index cf871807b2..3585535dec 100755
--- a/types/ember/test/observable.ts
+++ b/types/ember/test/observable.ts
@@ -14,6 +14,11 @@ class MyComponent extends Ember.Component {
         this.removeObserver('foo', this, this.fooDidChange);
         Ember.removeObserver(this, 'foo', this, 'fooDidChange');
         Ember.removeObserver(this, 'foo', this, this.fooDidChange);
+        const lambda = () => {
+            this.fooDidChange(this, 'foo');
+        };
+        this.addObserver('foo', lambda);
+        this.removeObserver('foo', lambda);
     }
 
     fooDidChange(sender: MyComponent, key: 'foo') {