test: Add type checks for LiveKitPermissions and VideoGrant interfaces

backend/tests/unit/typings/livekit-video-grants.test.ts

@@ -0,0 +1,40 @@
+import { describe, it, expect } from '@jest/globals';
+import { VideoGrant } from 'livekit-server-sdk';
+import { LiveKitPermissions } from '../../../src/typings/ce/index.js';
+
+// 1) Extract the keys from each interface using keyof
+type KeysLiveKit = keyof LiveKitPermissions;
+type KeysVideo = keyof VideoGrant;
+
+// 2) Calculate the differences between the interfaces
+type OnlyInLiveKit = Exclude<KeysLiveKit, KeysVideo>; // Properties only in LiveKitPermissions
+type OnlyInVideo = Exclude<KeysVideo, KeysLiveKit>; // Properties only in VideoGrant
+type SymmetricDiff = OnlyInLiveKit | OnlyInVideo; // All properties that differ between interfaces
+
+// 3) Type assertion that forces SymmetricDiff to be 'never'
+// If interfaces have different properties, this will cause a compile error
+type AssertNoDiff<T extends never> = T;
+type Assert = AssertNoDiff<SymmetricDiff>;
+
+// 4) Additional bi-directional assignability check
+// These will fail if property types don't match exactly
+type AssertLiveKitIsVideoGrant = LiveKitPermissions extends VideoGrant ? true : never;
+type AssertVideoGrantIsLiveKit = VideoGrant extends LiveKitPermissions ? true : never;
+type BiDirectionalCheck = [AssertLiveKitIsVideoGrant, AssertVideoGrantIsLiveKit];
+
+// 5) Check individual property types for exact matches
+type CheckPropertyTypes<K extends string | number | symbol> = LiveKitPermissions[K &
+	keyof LiveKitPermissions] extends VideoGrant[K & keyof VideoGrant]
+	? VideoGrant[K & keyof VideoGrant] extends LiveKitPermissions[K & keyof LiveKitPermissions]
+		? true
+		: never
+	: never;
+
+// Apply the check to all properties
+type PropertyTypeCheck = { [K in KeysVideo]: CheckPropertyTypes<K> };
+
+describe('OpenVidu Meet LiveKitPermissions type', () => {
+	it('should have identical properties to VideoGrant', () => {
+		expect(true).toBe(true); // Test passes if compilation succeeds
+	});
+});