DefinitelyTyped/types/express-mung/express-mung-tests.ts

import { Request, Response, ErrorRequestHandler } from "express";
import mung = require("express-mung");

function redact(body: {}, req: Request, res: Response) {
  return body;
}

mung.json(redact);
mung.json(redact, { mungError: true });

function redactAsync(body: {}, req: Request, res: Response) {
  return Promise.resolve(body);
}

mung.jsonAsync(redactAsync);
mung.jsonAsync(redactAsync, { mungError: true });

function transformHeadersAsync(req: Request, res: Response) {
  return Promise.resolve();
}

mung.headersAsync(transformHeadersAsync);

function transformChunk(chunk: string | Buffer, encoding: string | null, req: Request, res: Response) {
  return 'chunk';
}

mung.write(transformChunk);
mung.write(transformChunk, { mungError: true });

const errorRequestHandler: ErrorRequestHandler = (error, req, res, next) => {};
mung.onError = errorRequestHandler;