add tests

app/api/connection-details/route.ts

@@ -1,4 +1,5 @@
 import { randomString } from '@/lib/client-utils';
+import { getLiveKitURL } from '@/lib/getLiveKitURL';
 import { ConnectionDetails } from '@/lib/types';
 import { AccessToken, AccessTokenOptions, VideoGrant } from 'livekit-server-sdk';
 import { NextRequest, NextResponse } from 'next/server';
@@ -79,19 +80,6 @@ function createParticipantToken(userInfo: AccessTokenOptions, roomName: string)
   return at.toJwt();
 }
 
-/**
- * Get the LiveKit server URL for the given region.
- */
-function getLiveKitURL(projectUrl: string, region: string | null): string {
-  const url = new URL(projectUrl);
-  if (region && url.hostname.includes('livekit.cloud')) {
-    const hostParts = url.hostname.split('.');
-    const regionURL = [hostParts[0], region, ...hostParts].join('.');
-    url.hostname = regionURL;
-  }
-  return url.toString();
-}
-
 function getCookieExpirationTime(): string {
   var now = new Date();
   var time = now.getTime();

lib/getLiveKitURL.test.ts

@@ -0,0 +1,29 @@
+import { describe, it, expect } from 'vitest';
+import { getLiveKitURL } from './getLiveKitURL';
+
+describe('getLiveKitURL', () => {
+  it('returns the original URL if no region is provided', () => {
+    const url = 'https://myproject.livekit.cloud';
+    expect(getLiveKitURL(url, null)).toBe(url + '/');
+  });
+
+  it('inserts the region into livekit.cloud URLs', () => {
+    const url = 'https://myproject.livekit.cloud';
+    const region = 'eu';
+    expect(getLiveKitURL(url, region)).toBe('https://myproject.eu.myproject.livekit.cloud/');
+  });
+
+  it('returns the original URL for non-livekit.cloud hosts, even with region', () => {
+    const url = 'https://example.com';
+    const region = 'us';
+    expect(getLiveKitURL(url, region)).toBe(url + '/');
+  });
+
+  it('handles URLs with paths and query params', () => {
+    const url = 'https://myproject.livekit.cloud/room?foo=bar';
+    const region = 'ap';
+    expect(getLiveKitURL(url, region)).toBe(
+      'https://myproject.ap.myproject.livekit.cloud/room?foo=bar',
+    );
+  });
+});

lib/getLiveKitURL.ts

@@ -0,0 +1,9 @@
+export function getLiveKitURL(projectUrl: string, region: string | null): string {
+  const url = new URL(projectUrl);
+  if (region && url.hostname.includes('livekit.cloud')) {
+    const hostParts = url.hostname.split('.');
+    const regionURL = [hostParts[0], region, ...hostParts].join('.');
+    url.hostname = regionURL;
+  }
+  return url.toString();
+}

package.json

@@ -8,6 +8,7 @@
     "start": "next start",
     "lint": "next lint",
     "lint:fix": "next lint --fix",
+    "test": "vitest run",
     "format:check": "prettier --check \"**/*.{ts,tsx,md,json}\"",
     "format:write": "prettier --write \"**/*.{ts,tsx,md,json}\""
   },
@@ -31,9 +32,10 @@
     "@types/react-dom": "18.3.7",
     "eslint": "9.29.0",
     "eslint-config-next": "15.3.3",
+    "prettier": "3.5.3",
     "source-map-loader": "^5.0.0",
     "typescript": "5.8.3",
-    "prettier": "3.5.3"
+    "vitest": "^3.2.4"
   },
   "engines": {
     "node": ">=18"