Correctly expose missing_refresh_token error from worker

__tests__/http.test.ts

@@ -1,4 +1,4 @@
-import { MfaRequiredError } from '../src/errors';
+import { MfaRequiredError, MissingRefreshTokenError } from '../src/errors';
 import { switchFetch, getJSON } from '../src/http';
 import { expect } from '@jest/globals';
 
@@ -47,4 +47,17 @@ describe('getJson', () => {
       getJSON('https://test.com/', null, null, null, {}, undefined)
     ).rejects.toHaveProperty('mfa_token', '1234');
   });
+
+  it('throws MissingRefreshTokenError when missing_refresh_token is returned', async () => {
+    mockUnfetch.mockImplementation(() =>
+      Promise.resolve({
+        ok: false,
+        json: () => Promise.resolve({ error: 'missing_refresh_token' })
+      })
+    );
+
+    await expect(
+      getJSON('https://test.com/', null, null, null, {}, undefined)
+    ).rejects.toBeInstanceOf(MissingRefreshTokenError);
+  });
 });

__tests__/token.worker.test.ts

@@ -165,6 +165,7 @@ describe('token worker', () => {
       }
     });
 
+    expect(response.json.error).toBe('missing_refresh_token');
     expect(response.json.error_description).toContain(
       MISSING_REFRESH_TOKEN_ERROR_MESSAGE
     );

src/http.ts

@@ -5,7 +5,11 @@ import {
 
 import { sendMessage } from './worker/worker.utils';
 import { FetchOptions } from './global';
-import { GenericError, MfaRequiredError } from './errors';
+import {
+  GenericError,
+  MfaRequiredError,
+  MissingRefreshTokenError
+} from './errors';
 
 export const createAbortController = () => new AbortController();
 
@@ -142,6 +146,10 @@ export async function getJSON<T>(
       throw new MfaRequiredError(error, errorMessage, data.mfa_token);
     }
 
+    if (error === 'missing_refresh_token') {
+      throw new MissingRefreshTokenError(audience, scope);
+    }
+
     throw new GenericError(error || 'request_error', errorMessage);
   }
 

src/worker/token.worker.ts

@@ -116,6 +116,7 @@ const messageHandler = async ({
     port.postMessage({
       ok: false,
       json: {
+        error: error.error,
         error_description: error.message
       }
     });