Check if network error is propagated in error message

Author: NhienLam

packages/auth/src/api/index.test.ts

@@ -358,10 +358,12 @@ describe('api/_performApiRequest', () => {
         Endpoint.SIGN_UP,
         request
       );
-      await expect(promise).to.be.rejectedWith(
-        FirebaseError,
-        'auth/network-request-failed'
-      );
+      await expect(promise)
+        .to.be.rejectedWith(FirebaseError, 'auth/network-request-failed')
+        .eventually.with.nested.property(
+          'customData.message',
+          'Error: network error'
+        );
     });
   });
 

packages/auth/src/api/index.ts

@@ -183,7 +183,7 @@ export async function _performFetchWithErrorHandling<V>(
     }
     // Changing this to a different error code will log user out when there is a network error
     // because we treat any error other than NETWORK_REQUEST_FAILED as token is invalid.
-    // https://github.com/firebase/firebase-js-sdk/blob/master/packages/auth/src/core/auth/auth_impl.ts#L309-L316
+    // https://github.com/firebase/firebase-js-sdk/blob/4fbc73610d70be4e0852e7de63a39cb7897e8546/packages/auth/src/core/auth/auth_impl.ts#L309-L316
     _fail(auth, AuthErrorCode.NETWORK_REQUEST_FAILED, { 'message': String(e) });
   }
 }