fix: add fetch polyfill and update types for auth0-spa-js v2.10.0

- Added cross-fetch polyfill to test-setup.ts to support fetch API in tests
- Updated handleRedirectCallback return type to include ConnectAccountRedirectResult
- Updated test mocks to support new return types
- Required for compatibility with @auth0/auth0-spa-js v2.10.0

Author: yogeshchoudhary147

package-lock.json

@@ -32,7 +32,7 @@
     "@angular/platform-browser": "^18.2.13",
     "@angular/platform-browser-dynamic": "^18.2.13",
     "@angular/router": "^18.2.13",
-    "@auth0/auth0-spa-js": "^2.1.3",
+    "@auth0/auth0-spa-js": "^2.10.0",
     "rxjs": "^6.6.7",
     "tslib": "^2.8.1",
     "zone.js": "~0.14.10"
@@ -57,6 +57,7 @@
     "browserstack-cypress-cli": "^1.32.8",
     "concurrently": "^6.2.0",
     "cors": "^2.8.5",
+    "cross-fetch": "^4.1.0",
     "cypress": "^13.17.0",
     "eslint": "^8.57.0",
     "eslint-plugin-import": "latest",

package.json

@@ -58,7 +58,9 @@ describe('AuthService', () => {
       clientId: '',
     });
 
-    jest.spyOn(auth0Client, 'handleRedirectCallback').mockResolvedValue({});
+    jest.spyOn(auth0Client, 'handleRedirectCallback').mockResolvedValue({
+      appState: undefined,
+    } as any);
     jest.spyOn(auth0Client, 'loginWithRedirect').mockResolvedValue();
     jest.spyOn(auth0Client, 'loginWithPopup').mockResolvedValue();
     jest.spyOn(auth0Client, 'checkSession').mockResolvedValue();

projects/auth0-angular/src/lib/auth.service.spec.ts

@@ -8,6 +8,7 @@ import {
   GetTokenWithPopupOptions,
   RedirectLoginResult,
   GetTokenSilentlyVerboseResponse,
+  ConnectAccountRedirectResult,
 } from '@auth0/auth0-spa-js';
 
 import {
@@ -304,7 +305,9 @@ export class AuthService<TAppState extends AppState = AppState>
    */
   handleRedirectCallback(
     url?: string
-  ): Observable<RedirectLoginResult<TAppState>> {
+  ): Observable<
+    RedirectLoginResult<TAppState> | ConnectAccountRedirectResult<AppState>
+  > {
     return defer(() =>
       this.auth0Client.handleRedirectCallback<TAppState>(url)
     ).pipe(

projects/auth0-angular/src/lib/auth.service.ts

@@ -1,3 +1,6 @@
 import { setupZoneTestEnv } from 'jest-preset-angular/setup-env/zone';
 
 setupZoneTestEnv();
+
+// Provides fetch, Headers, Response, Request — works in Node + JSDOM
+import 'cross-fetch/polyfill';