Function withTimeout

test/unit/modules/defaults.test.js:11–21

(promise, label, ms = STARTUP_TIMEOUT_MS)

const STARTUP_TIMEOUT_MS = 500;

async function withTimeout(promise, label, ms = STARTUP_TIMEOUT_MS) {
  let timer;
  const guard = new Promise((_, reject) => {
    timer = setTimeout(() => reject(new Error(`${label}: startup chain hung > ${ms}ms`)), ms);
  });
  try {
    return await Promise.race([promise, guard]);
  } finally {
    clearTimeout(timer);
  }
}

// Wire chrome.storage.local.get/set against a plain object so each test can
// pre-seed state and observe writes. The default mock in service-worker-env.js