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'use strict';
14 years ago
var common = require('../common');
var assert = require('assert');
var events = require('events');
14 years ago
var count = 0;
function listener1() {
console.log('listener1');
count++;
}
function listener2() {
console.log('listener2');
count++;
}
function remove1() {
assert(0);
}
function remove2() {
assert(0);
}
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var e1 = new events.EventEmitter();
e1.on('hello', listener1);
e1.on('removeListener', common.mustCall(function(name, cb) {
assert.equal(name, 'hello');
assert.equal(cb, listener1);
}));
e1.removeListener('hello', listener1);
assert.deepEqual([], e1.listeners('hello'));
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var e2 = new events.EventEmitter();
e2.on('hello', listener1);
e2.on('removeListener', common.fail);
e2.removeListener('hello', listener2);
assert.deepEqual([listener1], e2.listeners('hello'));
14 years ago
var e3 = new events.EventEmitter();
e3.on('hello', listener1);
e3.on('hello', listener2);
e3.once('removeListener', common.mustCall(function(name, cb) {
assert.equal(name, 'hello');
assert.equal(cb, listener1);
assert.deepEqual([listener2], e3.listeners('hello'));
}));
e3.removeListener('hello', listener1);
assert.deepEqual([listener2], e3.listeners('hello'));
e3.once('removeListener', common.mustCall(function(name, cb) {
assert.equal(name, 'hello');
assert.equal(cb, listener2);
assert.deepEqual([], e3.listeners('hello'));
}));
e3.removeListener('hello', listener2);
assert.deepEqual([], e3.listeners('hello'));
var e4 = new events.EventEmitter();
e4.on('removeListener', common.mustCall(function(name, cb) {
if (cb !== remove1) return;
this.removeListener('quux', remove2);
this.emit('quux');
}, 2));
e4.on('quux', remove1);
e4.on('quux', remove2);
e4.removeListener('quux', remove1);
var e5 = new events.EventEmitter();
e5.on('hello', listener1);
e5.on('hello', listener2);
e5.once('removeListener', common.mustCall(function(name, cb) {
assert.equal(name, 'hello');
assert.equal(cb, listener1);
assert.deepEqual([listener2], e5.listeners('hello'));
e5.once('removeListener', common.mustCall(function(name, cb) {
assert.equal(name, 'hello');
assert.equal(cb, listener2);
assert.deepEqual([], e5.listeners('hello'));
}));
e5.removeListener('hello', listener2);
assert.deepEqual([], e5.listeners('hello'));
}));
e5.removeListener('hello', listener1);
assert.deepEqual([], e5.listeners('hello'));
const e6 = new events.EventEmitter();
const listener3 = common.mustCall(() => {
e6.removeListener('hello', listener4);
}, 2);
const listener4 = common.mustCall(() => {}, 1);
e6.on('hello', listener3);
e6.on('hello', listener4);
// listener4 will still be called although it is removed by listener 3.
e6.emit('hello');
// This is so because the interal listener array at time of emit
// was [listener3,listener4]
// Interal listener array [listener3]
e6.emit('hello');