From 67868e9eb810de94ca0bb6e1298799ee3f550145 Mon Sep 17 00:00:00 2001
From: Karl-Philipp Wulfert <krlwlfrt@gmail.com>
Date: Tue, 2 Apr 2019 16:24:27 +0200
Subject: [PATCH] fix: correct isThing guard

---
 src/core/types/Guards.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/core/types/Guards.ts b/src/core/types/Guards.ts
index a0efd1b6..ac03e169 100644
--- a/src/core/types/Guards.ts
+++ b/src/core/types/Guards.ts
@@ -24,7 +24,11 @@ import {SCThing, SCThingType} from '../Thing';
  * @param {any} something Something to check
  */
 export function isThing(something: any): something is SCThing {
-  return (something.type && something.type in SCThingType);
+  return (
+    typeof something === 'object'
+    && typeof something.type === 'string'
+    && Object.values(SCThingType).indexOf(something.type) >= 0
+  );
 }
 
 /**