ewrap all

ewrap.js

'use strict';
const express = require('express');
const app = (()=>{
    const ewrap = f=>{
        if (f.length>3)
            return f;
        return (req, res, next)=>(async ()=>f(req, res, next))().catch(next);
    };
    let app = express();
    for (let fn of ['use', 'all', 'get', 'post', 'put', 'delete', 'head', 'options'])
    {
        let orig = app[fn].bind(app);
        app[fn] = (...args)=>orig(...args.map(arg=>typeof arg=='function' ? ewrap(arg) : arg));
    }
    return app;
})();

app.all('/test', async (req, res)=>{
    res.send('test');
});

app.all('/error', async (req, res)=>{
    throw new Error('error');
});

app.use((err, req, res, next)=>{
    console.log(err.stack);
    res.status(500).send('Server Error');
});

app.listen(8080);

app.all('/test', async (req, res)=>{
  const promise = await new Promise(function (resolve, reject) {
        setTimeout(function () {
            reject(new Error('this is a test err'));
        }, 3000);
    });
});

this is not working..

(node:23932) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:23932) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): Error: error