bonree-zmq/test/gc.js

Bindings for node.js and io.js to ZeroMQ

var zmq = require('..')
  , should = require('should');

it('should cooperate with gc', function(done){
  var a = zmq.socket('dealer')
    , b = zmq.socket('dealer');

  /**
   * We create 2 dealer sockets.
   * One of them (`a`) is not referenced explicitly after the main loop
   * finishes so it's a pretender for garbage collection.
   * This test performs gc() explicitly and then tries to send a message
   * to a dealer socket that could be destroyed and collected.
   * If a message is delivered, than everything is ok. Otherwise the guard
   * timeout will make the test fail.
   */
  a.on('message', function(msg){
    msg.should.be.an.instanceof(Buffer);
    msg.toString().should.equal('hello');
    this.close();
    b.close();
    clearTimeout(timeout);
    done();
  });

  var bound = false;

  a.bind('tcp://127.0.0.1:5555', function(e){
    if (e) {
      clearInterval(interval);
      done(e);
    } else {
      bound = true;
    }
  });

  var interval = setInterval(function(){
    gc();
    if (bound) {
      clearInterval(interval);
      b.connect('tcp://127.0.0.1:5555');
      b.send('hello');
    }
  }, 100);

  // guard against hanging
  var timeout = setTimeout(function(){
    clearInterval(interval);
    done(new Error('timeout of 5000ms exceeded (bound: ' + bound + ')'));
  }, 15000);
});