/// <reference types="node" />
import express from 'express';
import * as http from 'http';
export declare type FakeAppServer = {
    url: undefined | URL;
    handler: (req: express.Request, res: express.Response) => void;
    server: undefined | http.Server;
};
export declare function newFakeAppServer(path: string): Promise<FakeAppServer>;
export declare function s(obj: unknown): string;