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common.js needs to be loaded in all tests so that there is checking for variable leaks and possibly other things. However, it does not need to be assigned to a variable if nothing in common.js is referred to elsewhere in the test. PR-URL: https://github.com/nodejs/node/pull/4408 Reviewed-By: James M Snell <jasnell@gmail.com>
58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
'use strict';
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require('../common');
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var assert = require('assert');
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var events = require('events');
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var callbacks_called = [];
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var e = new events.EventEmitter();
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function callback1() {
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callbacks_called.push('callback1');
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e.on('foo', callback2);
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e.on('foo', callback3);
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e.removeListener('foo', callback1);
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}
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function callback2() {
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callbacks_called.push('callback2');
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e.removeListener('foo', callback2);
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}
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function callback3() {
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callbacks_called.push('callback3');
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e.removeListener('foo', callback3);
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}
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e.on('foo', callback1);
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assert.equal(1, e.listeners('foo').length);
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e.emit('foo');
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assert.equal(2, e.listeners('foo').length);
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assert.deepEqual(['callback1'], callbacks_called);
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e.emit('foo');
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assert.equal(0, e.listeners('foo').length);
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assert.deepEqual(['callback1', 'callback2', 'callback3'], callbacks_called);
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e.emit('foo');
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assert.equal(0, e.listeners('foo').length);
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assert.deepEqual(['callback1', 'callback2', 'callback3'], callbacks_called);
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e.on('foo', callback1);
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e.on('foo', callback2);
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assert.equal(2, e.listeners('foo').length);
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e.removeAllListeners('foo');
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assert.equal(0, e.listeners('foo').length);
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// Verify that removing callbacks while in emit allows emits to propagate to
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// all listeners
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callbacks_called = [];
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e.on('foo', callback2);
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e.on('foo', callback3);
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assert.equal(2, e.listeners('foo').length);
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e.emit('foo');
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assert.deepEqual(['callback2', 'callback3'], callbacks_called);
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assert.equal(0, e.listeners('foo').length);
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