Function getRandomPort

e2e/helper/utils.ts:62–71

(defaultPort = Math.ceil(Math.random() * 30000) + 15000)

 * so we use `15000` ~ `45000`.
 */
export async function getRandomPort(defaultPort = Math.ceil(Math.random() * 30000) + 15000) {
  let port = defaultPort;
  while (true) {
    if (!portMap.get(port) && (await isPortAvailable(port))) {
      portMap.set(port, 1);
      return port;
    }
    port++;
  }
}

// fast-glob only accepts posix path
// https://github.com/mrmlnc/fast-glob#convertpathtopatternpath