chore: import upstream snapshot with attribution

2026-07-13 13:32:57 +08:00
commit cd420f9332
4811 changed files with 884702 additions and 0 deletions
@@ -0,0 +1,30 @@
+import { describe, expect, it } from "vitest";
+import { isValidTimeZone } from "~/utils/timezones.server";
+
+describe("isValidTimeZone", () => {
+  // These are all zones a browser can report via
+  // Intl.DateTimeFormat().resolvedOptions().timeZone, but which are NOT in
+  // Intl.supportedValuesOf("timeZone"). Rejecting them left the user's stored
+  // timezone stale (their preference update would 400).
+  it.each(["UTC", "Etc/UTC", "GMT", "Asia/Kolkata"])(
+    "accepts %s even though it is not in supportedValuesOf",
+    (tz) => {
+      expect(Intl.supportedValuesOf("timeZone").includes(tz)).toBe(false);
+      expect(isValidTimeZone(tz)).toBe(true);
+    }
+  );
+
+  it.each(["Europe/London", "Europe/Moscow", "America/New_York", "Asia/Calcutta"])(
+    "accepts canonical zone %s",
+    (tz) => {
+      expect(isValidTimeZone(tz)).toBe(true);
+    }
+  );
+
+  it.each(["", "Not/AZone", "Mars/Phobos", "Europe/Nowhere", "12345"])(
+    "rejects invalid zone %s",
+    (tz) => {
+      expect(isValidTimeZone(tz)).toBe(false);
+    }
+  );
+});