node/test/sequential/test-net-server-address.js

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');

// Test on IPv4 Server
{
  const family = 'IPv4';
  const server = net.createServer();

  server.on('error', common.mustNotCall());

  server
    .listen(common.PORT + 1, common.localhostIPv4, common.mustCall(() => {
      const address4 = server.address();
      assert.strictEqual(address4.address, common.localhostIPv4);
      assert.strictEqual(address4.port, common.PORT + 1);
      assert.strictEqual(address4.family, family);
      server.close();
    }));
}

if (!common.hasIPv6) {
  common.printSkipMessage('ipv6 part of test, no IPv6 support');
  return;
}

const family6 = 'IPv6';
const anycast6 = '::';

// Test on IPv6 Server
{
  const localhost = '::1';

  const server = net.createServer();

  server.on('error', common.mustNotCall());

  server.listen(common.PORT + 2, localhost, common.mustCall(() => {
    const address = server.address();
    assert.strictEqual(address.address, localhost);
    assert.strictEqual(address.port, common.PORT + 2);
    assert.strictEqual(address.family, family6);
    server.close();
  }));
}

// Test without hostname or ip
{
  const server = net.createServer();

  server.on('error', common.mustNotCall());

  // Specify the port number
  server.listen(common.PORT + 3, common.mustCall(() => {
    const address = server.address();
    assert.strictEqual(address.address, anycast6);
    assert.strictEqual(address.port, common.PORT + 3);
    assert.strictEqual(address.family, family6);
    server.close();
  }));
}

// Test without hostname or port
{
  const server = net.createServer();

  server.on('error', common.mustNotCall());

  // Don't specify the port number
  server.listen(common.mustCall(() => {
    const address = server.address();
    assert.strictEqual(address.address, anycast6);
    assert.strictEqual(address.family, family6);
    server.close();
  }));
}

// Test without hostname, but with a false-y port
{
  const server = net.createServer();

  server.on('error', common.mustNotCall());

  // Specify a false-y port number
  server.listen(0, common.mustCall(() => {
    const address = server.address();
    assert.strictEqual(address.address, anycast6);
    assert.strictEqual(address.family, family6);
    server.close();
  }));
}