socket.io/test/socket.js

var expect = require('expect.js');
var io = require('../');

describe('socket', function () {
  this.timeout(70000);

  it('should have an accessible socket id equal to the engine.io socket id', function (done) {
    var socket = io({ forceNew: true });
    socket.on('connect', function () {
      expect(socket.id).to.be.ok();
      expect(socket.id).to.eql(socket.io.engine.id);
      socket.disconnect();
      done();
    });
  });

  it('clears socket.id upon disconnection', function (done) {
    var socket = io({ forceNew: true });
    socket.on('connect', function () {
      socket.on('disconnect', function () {
        expect(socket.id).to.not.be.ok();
        done();
      });

      socket.disconnect();
    });
  });

  it('doesn\'t fire a connect_error if we force disconnect in opening state', function (done) {
    var socket = io({ forceNew: true, timeout: 100 });
    socket.disconnect();
    socket.on('connect_error', function () {
      throw new Error('Unexpected');
    });
    setTimeout(function () {
      done();
    }, 300);
  });

  it('should ping and pong with latency', function (done) {
    var socket = io({ forceNew: true });
    socket.on('connect', function () {
      var pinged;
      socket.once('ping', function () {
        pinged = true;
      });
      socket.once('pong', function (ms) {
        expect(pinged).to.be(true);
        expect(ms).to.be.a('number');
        socket.disconnect();
        done();
      });
    });
  });

  it('should change socket.id upon reconnection', function (done) {
    var socket = io({ forceNew: true });
    socket.on('connect', function () {
      var id = socket.id;

      socket.on('reconnect_attempt', function () {
        expect(socket.id).to.not.be.ok();
      });

      socket.on('reconnect', function () {
        expect(socket.id).to.not.eql(id);
        socket.disconnect();
        done();
      });

      socket.io.engine.close();
    });
  });

  it('should enable compression by default', function (done) {
    var socket = io({ forceNew: true });
    socket.on('connect', function () {
      socket.io.engine.once('packetCreate', function (packet) {
        expect(packet.options.compress).to.be(true);
        socket.disconnect();
        done();
      });
      socket.emit('hi');
    });
  });

  it('should disable compression', function (done) {
    var socket = io({ forceNew: true });
    socket.on('connect', function () {
      socket.io.engine.once('packetCreate', function (packet) {
        expect(packet.options.compress).to.be(false);
        socket.disconnect();
        done();
      });
      socket.compress(false).emit('hi');
    });
  });
});