From 8900b19c1c0fe54fa09efb6c029f115ba2230344 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Wed, 7 Oct 2026 03:56:18 +0000
Subject: [PATCH] Add missing error test for invalid IANA timezone in
 resolveZone

Tested `resolveZone` boundary conditions by verifying that invalid strings trigger the internal Intl.DateTimeFormat error catch and correctly evaluate to null.

Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>
---
 src/engine/datetime.test.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/engine/datetime.test.ts b/src/engine/datetime.test.ts
index 91f51d4..9ee00b2 100644
--- a/src/engine/datetime.test.ts
+++ b/src/engine/datetime.test.ts
@@ -78,6 +78,7 @@ describe("datetime", () => {
     it("should return null for unknown timezones", () => {
       expect(resolveZone(["Unknown", "City"])).toBeNull();
       expect(resolveZone(["Invalid/Timezone"])).toBeNull();
+      expect(resolveZone(["Invalid", "Zone"])).toBeNull();
     });
   });