Function createPartialDone

packages/socket.io/test/uws.ts:12–21

(done: (err?: Error) => void, count: number)

import { assert } from "./support/util";

const createPartialDone = (done: (err?: Error) => void, count: number) => {
  let i = 0;
  return () => {
    if (++i === count) {
      done();
    } else if (i > count) {
      done(new Error(`partialDone() called too many times: ${i} > ${count}`));
    }
  };
};

const shouldNotHappen = (done) => () => done(new Error("should not happen"));