How to use the @hapi/shot/lib/request.prototype function in @hapi/shot

export function stubServerRequest(
  options: ShotRequestOptions,
): IncomingMessage {
  const stub = new ShotRequest(options);
  // Hacky workaround for Express, see
  // https://github.com/expressjs/express/blob/4.16.3/lib/middleware/init.js
  // https://github.com/hapijs/shot/issues/82#issuecomment-247943773
  // https://github.com/jfhbrook/pickleback
  Object.assign(stub, ShotRequest.prototype);
  return stub;
}

function inject (dispatchFunc, options, callback) {
  options = (typeof options === 'string' ? { url: options } : options);
  Assert(typeof dispatchFunc === 'function', 'Invalid dispatch function');
  Joi.assert(options, schema);

  const req = new Request(options);
  const res = new Response(req, callback);

  // Bind the req and res methods, as Express sets the prototype internally.
  req._read = Request.prototype._read.bind(req);
  req.destroy = Request.prototype.destroy.bind(req);
  res.writeHead = Response.prototype.writeHead.bind(res);
  res.write = Response.prototype.write.bind(res);
  res.end = Response.prototype.end.bind(res);
  res.destroy = Response.prototype.destroy.bind(res);
  res.addTrailers = Response.prototype.addTrailers.bind(res);

  return req.prepare(() => { dispatchFunc(req, res); });
}

function inject (dispatchFunc, options, callback) {
  options = (typeof options === 'string' ? { url: options } : options);
  Assert(typeof dispatchFunc === 'function', 'Invalid dispatch function');
  Joi.assert(options, schema);

  const req = new Request(options);
  const res = new Response(req, callback);

  // Bind the req and res methods, as Express sets the prototype internally.
  req._read = Request.prototype._read.bind(req);
  req.destroy = Request.prototype.destroy.bind(req);
  res.writeHead = Response.prototype.writeHead.bind(res);
  res.write = Response.prototype.write.bind(res);
  res.end = Response.prototype.end.bind(res);
  res.destroy = Response.prototype.destroy.bind(res);
  res.addTrailers = Response.prototype.addTrailers.bind(res);

  return req.prepare(() => { dispatchFunc(req, res); });
}