test-event-emitter-remove-listeners.js

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//
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// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
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// in all copies or substantial portions of the Software.
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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var common = require('../common');
var assert = require('assert');
var events = require('events');


var count = 0;
var gcount = 0;

function listener1() {
  console.log('listener1');
  count++;
}

function listener2() {
  console.log('listener2');
  count++;
}

function listener3() {
  console.log('listener3');
  count++;
}

function globalListener1() {
  console.log('globalListener1');
  gcount++;
}

function globalListener2() {
  console.log('globalListener2');
  gcount++;
}

var e1 = new events.EventEmitter();
e1.addListener('hello', listener1);
e1.removeListener('hello', listener1);
assert.deepEqual([], e1.listeners('hello'));

var e2 = new events.EventEmitter();
e2.addListener('hello', listener1);
e2.removeListener('hello', listener2);
assert.deepEqual([listener1], e2.listeners('hello'));

var e3 = new events.EventEmitter();
e3.addListener('hello', listener1);
e3.addListener('hello', listener2);
e3.removeListener('hello', listener1);
assert.deepEqual([listener2], e3.listeners('hello'));

var e4 = new events.EventEmitter();
e4.on('*', globalListener1);
e4.removeListener('*', globalListener1);
assert.deepEqual([], e4.listeners('*'));

var e5 = new events.EventEmitter();
e5.on('*', globalListener1);
e5.on('*', globalListener2);
e5.removeListener('*', globalListener1);
assert.deepEqual([globalListener2], e5.listeners('*'));