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rOACCT/node_modules/events/tests/listeners.js
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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
require('./common');
var assert = require('assert');
var events = require('../');
var util = require('util');
function listener() {}
function listener2() {}
function listener3() {
return 0;
}
function listener4() {
return 1;
}
function TestStream() {}
util.inherits(TestStream, events.EventEmitter);
{
var ee = new events.EventEmitter();
ee.on('foo', listener);
var fooListeners = ee.listeners('foo');
var listeners = ee.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 1);
assert.strictEqual(listeners[0], listener);
ee.removeAllListeners('foo');
listeners = ee.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 0);
assert.ok(Array.isArray(fooListeners));
assert.strictEqual(fooListeners.length, 1);
assert.strictEqual(fooListeners[0], listener);
}
{
var ee = new events.EventEmitter();
ee.on('foo', listener);
var eeListenersCopy = ee.listeners('foo');
assert.ok(Array.isArray(eeListenersCopy));
assert.strictEqual(eeListenersCopy.length, 1);
assert.strictEqual(eeListenersCopy[0], listener);
var listeners = ee.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 1);
assert.strictEqual(listeners[0], listener);
eeListenersCopy.push(listener2);
listeners = ee.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 1);
assert.strictEqual(listeners[0], listener);
assert.strictEqual(eeListenersCopy.length, 2);
assert.strictEqual(eeListenersCopy[0], listener);
assert.strictEqual(eeListenersCopy[1], listener2);
}
{
var ee = new events.EventEmitter();
ee.on('foo', listener);
var eeListenersCopy = ee.listeners('foo');
ee.on('foo', listener2);
var listeners = ee.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 2);
assert.strictEqual(listeners[0], listener);
assert.strictEqual(listeners[1], listener2);
assert.ok(Array.isArray(eeListenersCopy));
assert.strictEqual(eeListenersCopy.length, 1);
assert.strictEqual(eeListenersCopy[0], listener);
}
{
var ee = new events.EventEmitter();
ee.once('foo', listener);
var listeners = ee.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 1);
assert.strictEqual(listeners[0], listener);
}
{
var ee = new events.EventEmitter();
ee.on('foo', listener);
ee.once('foo', listener2);
var listeners = ee.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 2);
assert.strictEqual(listeners[0], listener);
assert.strictEqual(listeners[1], listener2);
}
{
var ee = new events.EventEmitter();
ee._events = undefined;
var listeners = ee.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 0);
}
{
var s = new TestStream();
var listeners = s.listeners('foo');
assert.ok(Array.isArray(listeners));
assert.strictEqual(listeners.length, 0);
}
{
var ee = new events.EventEmitter();
ee.on('foo', listener);
var wrappedListener = ee.rawListeners('foo');
assert.strictEqual(wrappedListener.length, 1);
assert.strictEqual(wrappedListener[0], listener);
assert.notStrictEqual(wrappedListener, ee.rawListeners('foo'));
ee.once('foo', listener);
var wrappedListeners = ee.rawListeners('foo');
assert.strictEqual(wrappedListeners.length, 2);
assert.strictEqual(wrappedListeners[0], listener);
assert.notStrictEqual(wrappedListeners[1], listener);
assert.strictEqual(wrappedListeners[1].listener, listener);
assert.notStrictEqual(wrappedListeners, ee.rawListeners('foo'));
ee.emit('foo');
assert.strictEqual(wrappedListeners.length, 2);
assert.strictEqual(wrappedListeners[1].listener, listener);
}
{
var ee = new events.EventEmitter();
ee.once('foo', listener3);
ee.on('foo', listener4);
var rawListeners = ee.rawListeners('foo');
assert.strictEqual(rawListeners.length, 2);
assert.strictEqual(rawListeners[0](), 0);
var rawListener = ee.rawListeners('foo');
assert.strictEqual(rawListener.length, 1);
assert.strictEqual(rawListener[0](), 1);
}
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