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* Document that Symbol can used as event names. * Add test for using Symbol as event names PR-URL: #4151 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]>
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'use strict'; | ||
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const common = require('../common'); | ||
const EventEmitter = require('events'); | ||
const assert = require('assert'); | ||
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const ee = new EventEmitter(); | ||
const foo = Symbol('foo'); | ||
const listener = common.mustCall(function() {}); | ||
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ee.on(foo, listener); | ||
assert.deepEqual(ee.listeners(foo), [listener]); | ||
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ee.emit(foo); | ||
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ee.removeAllListeners(); | ||
assert.deepEqual(ee.listeners(foo), []); | ||
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ee.on(foo, listener); | ||
assert.deepEqual(ee.listeners(foo), [listener]); | ||
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ee.removeListener(foo, listener); | ||
assert.deepEqual(ee.listeners(foo), []); |