describe(MDNS.name, () => {
  let mdns1: MDNS;
  let mdns2: MDNS;

  beforeEach(async () => {
    mdns1 = new MDNS();
    mdns2 = new MDNS();
  });
  afterEach(async () => {
    await mdns1.stop();
    await mdns2.stop();
  });
  test('advertisement', async () => {
    const mdnsPort = 1234 as Port;
    const mdns1Hostname = 'polykey1' as Hostname;
    const mdns2Hostname = 'polykey2' as Hostname;
    await mdns1.start({ hostname: mdns1Hostname, port: mdnsPort });
    await mdns2.start({ hostname: mdns2Hostname, port: mdnsPort });
    const service = {
      name: 'test',
      port: mdnsPort,
      protocol: 'udp',
      type: 'polykey',
    } as Parameters<typeof MDNS.prototype.registerService>[0];
    mdns2.registerService(service);
    await new Promise((resolve, reject) => {
      mdns1.addEventListener(
        events.EventMDNSService.name,
        (e: events.EventMDNSService) => {
          console.log(e.detail.hosts)
          // only 127.0.0.1 will show up, meaning that none of the other ipv4 bound sockets received the message
          try {
            expect(e.detail.name).toBe(service.name);
            expect(e.detail.port).toBe(service.port);
            expect(e.detail.protocol).toBe(service.protocol);
            expect(e.detail.type).toBe(service.type);
            expect(e.detail.hostname).toBe(mdns2Hostname + '.local');
            resolve(null);
          } catch (e) {
            reject(e);
          }
        },
      );
    });
  });
});

import * as dgram from 'dgram';
describe('', () => {
  test('', () => {
    const iface = '172.19.207.91';
    const group = '224.0.0.251';
    const port = 1234;
    const s1 = dgram.createSocket({
      type: 'udp4',
      reuseAddr: true,
    });
    s1.addListener('message', (msg) => {
      console.log(msg.toString());
      // nothing will ever be logged
    });
    s1.bind(port, group, () => {
      s1.addMembership(group, iface);
      s1.setMulticastInterface(iface);
      s1.setMulticastLoopback(true);
      s1.setMulticastTTL(255);

      const s2 = dgram.createSocket({
        type: 'udp4',
        reuseAddr: true,
      });

      s2.bind(port, group, () => {
        s2.addMembership(group, iface);
        s2.setMulticastInterface(iface);
        s2.setMulticastLoopback(true);
        s2.setMulticastTTL(255);
        s2.send('123', port, group);
      });
    });
  })
})