remove usages of some backend-common helpers

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/auth-node/src/oauth/createOAuthRouteHandlers.test.ts

@@ -22,10 +22,11 @@ import PromiseRouter from 'express-promise-router';
 import { AuthProviderRouteHandlers, AuthResolverContext } from '../types';
 import { createOAuthRouteHandlers } from './createOAuthRouteHandlers';
 import { OAuthAuthenticator } from './types';
-import { errorHandler } from '@backstage/backend-common';
 import { encodeOAuthState, OAuthState } from './state';
 import { PassportProfile } from '../passport';
 import { parseWebMessageResponse } from '../flow/__testUtils__/parseWebMessageResponse';
+import { MiddlewareFactory } from '@backstage/backend-defaults/rootHttpRouter';
+import { mockServices } from '@backstage/backend-test-utils';
 
 const mockAuthenticator: jest.Mocked<OAuthAuthenticator<unknown, unknown>> = {
   initialize: jest.fn(_r => ({ ctx: 'authenticator' })),
@@ -63,13 +64,17 @@ const baseConfig = {
 };
 
 function wrapInApp(handlers: AuthProviderRouteHandlers) {
+  const middleware = MiddlewareFactory.create({
+    logger: mockServices.logger.mock(),
+    config: mockServices.rootConfig(),
+  });
   const app = express();
 
   const router = PromiseRouter();
 
   router.use(cookieParser());
   app.use('/my-provider', router);
-  app.use(errorHandler());
+  app.use(middleware.error());
 
   router.get('/start', handlers.start.bind(handlers));
   router.get('/handler/frame', handlers.frameHandler.bind(handlers));