setMax.js

var simpleEvents= require('nodeunit').testCase;

var file = '../../lib/eventemitter2';

module.exports = simpleEvents({

  setUp: function (callback) {
    var EventEmitter2;

    if(typeof require !== 'undefined') {
      EventEmitter2 = require(file).EventEmitter2;
    }
    else {
      EventEmitter2 = window.EventEmitter2;
    }

    this.emitter = new EventEmitter2;
    callback();
  },

  tearDown: function (callback) {
    //clean up?
    callback();
  },

  'setMaxListener1. default behavior of 10 listeners.' : function (test) {
    var emitter = this.emitter;

    for (var i = 0; i < 10; i++) {
      emitter.on('foobar', function () {
        test.ok(true, 'event was raised');
      });
    }

    var listeners = emitter.listeners('foobar');
    test.equal(listeners.length, 10, 'should only have 10');

    test.expect(1);
    test.done();
  },

  'setMaxListener2. If we added more than 10, should not see them' : function (test) {
    var emitter = this.emitter;

    for (var i = 0; i < 10 ; i++) {
      emitter.on('foobar2', function () {
        test.ok(true, 'event was raised');
      });
    }
    console.log('should see EE2 complaining:');
    emitter.on('foobar2', function () {
      test.ok(true, 'event was raised');
    });
    console.log('move on');

    var listeners = emitter.listeners('foobar2');
    test.equal(listeners.length, 11, 'should have 11');
    test.ok(emitter._events['foobar2'].warned, 'should have been warned');

    test.expect(2);
    test.done();
  },

  'setMaxListener3. if we set maxListener to be greater before adding' : function (test) {
    var emitter = this.emitter;
    var type = 'foobar3';

    // set to 20
    emitter.setMaxListeners(20);

    for (var i = 0; i < 15 ; i++) {
      emitter.on(type, function () {
        test.ok(true, 'event was raised');
      });
    }

//    require('eyes').inspect(emitter._events);

    var listeners = emitter.listeners(type);
    test.equal(listeners.length, 15, 'should have 15');
    test.ok(!(emitter._events[type].warned), 'should not have been set');

    test.expect(2);
    test.done();
  },

  'setMaxListener4. should be able to change it right at 10' : function (test) {
    var emitter = this.emitter;
    var type = 'foobar4';

    for (var i = 0; i < 10 ; i++) {
      emitter.on(type, function () {
        test.ok(true, 'event was raised');
      });
    }

    emitter.setMaxListeners(9001);
    emitter.on(type, function () {
      test.ok(true, 'event was raised');
    });

//    require('eyes').inspect(emitter._events);

    var listeners = emitter.listeners(type);
    test.equal(listeners.length, 11, 'should have 11');
    test.ok(!(emitter._events[type].warned), 'should not have been set');

    test.expect(2);
    test.done();
  },

  'setMaxListener5. if we set maxListener to be 0 should add endlessly' : function (test) {
    var emitter = this.emitter;
    var type = 'foobar';

    // set to 0
    emitter.setMaxListeners(0);

    for (var i = 0; i < 25 ; i++) {
      emitter.on(type, function () {
        test.ok(true, 'event was raised');
      });
    }

    var listeners = emitter.listeners(type);
    test.equal(listeners.length, 25, 'should have 25');
    test.ok(!(emitter._events[type].warned), 'should not have been set');

    test.expect(2);
    test.done();
  },

});