fix FcmErrorCode error type (#391)

* fix FcmErrorCode error type

* add changelog

Author: chemidy

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Unreleased
 
--
+- [fixed] Fixing error handling in FCM. The SDK now checks the key
+  type.googleapis.com/google.firebase.fcm.v1.FcmError to set error code.
 
 # v6.1.0
 

src/messaging/messaging-api-request.ts

@@ -45,7 +45,7 @@ export class FirebaseMessagingRequestHandler {
         return response.error;
       }
       if (validator.isArray(response.error.details)) {
-        const fcmErrorType = 'type.googleapis.com/google.firebase.fcm.v1.FcmErrorCode';
+        const fcmErrorType = 'type.googleapis.com/google.firebase.fcm.v1.FcmError';
         for (const element of response.error.details) {
           if (element['@type'] === fcmErrorType) {
             return element.errorCode;

test/unit/messaging/messaging.spec.ts

@@ -413,7 +413,7 @@ describe('Messaging', () => {
           message: 'test error message',
           details: [
             {
-              '@type': 'type.googleapis.com/google.firebase.fcm.v1.FcmErrorCode',
+              '@type': 'type.googleapis.com/google.firebase.fcm.v1.FcmError',
               'errorCode': 'UNREGISTERED',
             },
           ],