Function freePort

packages/simdeck-test/src/index.ts:853–868

()

}

function freePort(): Promise<number> {
  return new Promise((resolve, reject) => {
    const server = net.createServer();
    server.listen(0, "127.0.0.1", () => {
      const address = server.address();
      if (!address || typeof address === "string") {
        server.close();
        reject(new Error("Unable to allocate a free TCP port."));
        return;
      }
      const port = address.port;
      server.close(() => resolve(port));
    });
    server.on("error", reject);
  });
}

function portAvailable(port: number): Promise<boolean> {
  return new Promise((resolve) => {