Function createPartialDone

packages/engine.io/test/webtransport.mjs:17–26

(done, count)

}

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

async function setupServer(opts, cb) {
  const certificate = await generateWebTransportCertificate(