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4f2e372716
Export a new common.noop no-operation function for general use. Allow using common.mustCall() without a fn argument to simplify test cases. Replace various non-op functions throughout tests with common.noop PR-URL: https://github.com/nodejs/node/pull/12027 Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com> Reviewed-By: Teddy Katz <teddy.katz@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
19 lines
585 B
JavaScript
19 lines
585 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', common.noop);
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emitter.on('foo', common.noop);
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emitter.on('baz', common.noop);
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// Allow any type
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emitter.on(123, common.noop);
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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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