socket.io/test/node.js

const path = require("path");
const { exec } = require("child_process");

describe("autoRef option", () => {
  const fixture = filename =>
    process.execPath + " " + path.join(__dirname, "fixtures", filename);

  it("should stop once the timer is triggered", done => {
    exec(fixture("unref.js"), done);
  });

  it("should stop once the timer is triggered (polling)", done => {
    exec(fixture("unref-polling-only.js"), done);
  });

  it("should stop once the timer is triggered (websocket)", done => {
    exec(fixture("unref-websocket-only.js"), done);
  });

  it("should not stop with autoUnref set to false", done => {
    const process = exec(fixture("no-unref.js"), () => {
      done(new Error("should not happen"));
    });
    setTimeout(() => {
      process.kill();
      done();
    }, 1000);
  });
});