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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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