From 498d6db794198cf13d5f6740f5cec2bde3a646d4 Mon Sep 17 00:00:00 2001
From: Mark Stacey <markjstacey@gmail.com>
Date: Tue, 26 Sep 2023 15:26:08 -0230
Subject: [PATCH] Add tests for the assertIsError function

---
 packages/name-controller/src/utils.test.ts | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/packages/name-controller/src/utils.test.ts b/packages/name-controller/src/utils.test.ts
index b5d0ef2308..556af3bb84 100644
--- a/packages/name-controller/src/utils.test.ts
+++ b/packages/name-controller/src/utils.test.ts
@@ -1,4 +1,4 @@
-import { graphQL } from './util';
+import { assertIsError, graphQL } from './util';
 
 describe('Utils', () => {
   describe('graphQL', () => {
@@ -51,4 +51,16 @@ describe('Utils', () => {
       );
     });
   });
+
+  describe('assertIsError', () => {
+    it('does not throw if given an error', () => {
+      expect(() => assertIsError(new Error('test'))).not.toThrow();
+    });
+
+    it('throws if passed something that is not an error', () => {
+      expect(() => assertIsError('test')).toThrow(
+        `Invalid error of type 'string'`,
+      );
+    });
+  });
 });