mock-server.ts

import { type DefaultBodyType, HttpResponse, type HttpResponseResolver, type PathParams } from 'msw';
import { setupServer } from 'msw/node';

const globalHandlers: any[] = [];

export const server = setupServer(...globalHandlers);

// A higher-order response resolver that validates the request headers before proceeding
export function validateHeaders<
  Params extends PathParams,
  RequestBodyType extends DefaultBodyType,
  ResponseBodyType extends DefaultBodyType,
>(
  resolver: HttpResponseResolver<Params, RequestBodyType, ResponseBodyType>,
): HttpResponseResolver<Params, RequestBodyType, ResponseBodyType | Record<string, string>> {
  return async ({ request, requestId, params, cookies }) => {
    if (!request.headers.get('Authorization')) {
      return HttpResponse.json(
        {
          error: 'Unauthorized',
          message: 'Missing Authorization header',
        },
        { status: 401 },
      );
    }
    if (!request.headers.get('Clerk-API-Version')) {
      return HttpResponse.json(
        {
          error: 'Bad request',
          message: 'Missing Clerk-API-Version header',
        },
        { status: 400 },
      );
    }
    if (!request.headers.get('User-Agent') || request.headers.get('User-Agent') !== '@clerk/backend@0.0.0-test') {
      return HttpResponse.json(
        {
          error: 'Bad request',
          message: 'Missing or invalid User-Agent header',
        },
        { status: 400 },
      );
    }

    return resolver({ request, requestId, params, cookies });
  };
}