Function getAvailablePort

test/utils/helpers.ts:78–91

(options?: net.ListenOptions)

 * Source: https://github.com/sindresorhus/get-port/blob/main/index.js#L23-L33
 */
export const getAvailablePort = (options?: net.ListenOptions): Promise<number> =>
  new Promise((resolve, reject) => {
    const server = net.createServer()
    server.unref()
    server.on("error", reject)
    server.listen(options, () => {
      // NOTE@jsjoeio: not a huge fan of the type assertion
      // but it works for now.
      const { port } = server.address() as net.AddressInfo
      server.close(() => {
        resolve(port)
      })
    })
  })

/**
 * Return a timer that will not reject as long as it is disposed or continually