require('./common');
var assert = require('assert');
var events = require('../');
var callbacks_called = [];
var e = new events.EventEmitter();
function callback1() {
callbacks_called.push('callback1');
e.on('foo', callback2);
e.on('foo', callback3);
e.removeListener('foo', callback1);
}
function callback2() {
callbacks_called.push('callback2');
e.removeListener('foo', callback2);
}
function callback3() {
callbacks_called.push('callback3');
e.removeListener('foo', callback3);
}
e.on('foo', callback1);
assert.strictEqual(e.listeners('foo').length, 1);
e.emit('foo');
assert.strictEqual(e.listeners('foo').length, 2);
assert.ok(Array.isArray(callbacks_called));
assert.strictEqual(callbacks_called.length, 1);
assert.strictEqual(callbacks_called[0], 'callback1');
e.emit('foo');
assert.strictEqual(e.listeners('foo').length, 0);
assert.ok(Array.isArray(callbacks_called));
assert.strictEqual(callbacks_called.length, 3);
assert.strictEqual(callbacks_called[0], 'callback1');
assert.strictEqual(callbacks_called[1], 'callback2');
assert.strictEqual(callbacks_called[2], 'callback3');
e.emit('foo');
assert.strictEqual(e.listeners('foo').length, 0);
assert.ok(Array.isArray(callbacks_called));
assert.strictEqual(callbacks_called.length, 3);
assert.strictEqual(callbacks_called[0], 'callback1');
assert.strictEqual(callbacks_called[1], 'callback2');
assert.strictEqual(callbacks_called[2], 'callback3');
e.on('foo', callback1);
e.on('foo', callback2);
assert.strictEqual(e.listeners('foo').length, 2);
e.removeAllListeners('foo');
assert.strictEqual(e.listeners('foo').length, 0);
callbacks_called = [];
e.on('foo', callback2);
e.on('foo', callback3);
assert.strictEqual(2, e.listeners('foo').length);
e.emit('foo');
assert.ok(Array.isArray(callbacks_called));
assert.strictEqual(callbacks_called.length, 2);
assert.strictEqual(callbacks_called[0], 'callback2');
assert.strictEqual(callbacks_called[1], 'callback3');
assert.strictEqual(0, e.listeners('foo').length);