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As per the discussion in #734, this patch deprecates the usage of `EventEmitter.listenerCount` static function in the docs, and introduces the `listenerCount` function in the prototype of `EventEmitter` itself. PR-URL: https://github.com/nodejs/node/pull/2349 Reviewed-By: Trevor Norris <trev.norris@gmail.com> Reviewed-By: Brian White <mscdex@mscdex.net>
19 lines
593 B
JavaScript
19 lines
593 B
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const EventEmitter = require('events');
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const emitter = new EventEmitter();
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emitter.on('foo', function() {});
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emitter.on('foo', function() {});
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emitter.on('baz', function() {});
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// Allow any type
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emitter.on(123, function() {});
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assert.strictEqual(EventEmitter.listenerCount(emitter, 'foo'), 2);
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assert.strictEqual(emitter.listenerCount('foo'), 2);
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assert.strictEqual(emitter.listenerCount('bar'), 0);
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assert.strictEqual(emitter.listenerCount('baz'), 1);
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assert.strictEqual(emitter.listenerCount(123), 1);
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