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/ (Root)
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opt
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alt
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alt-nodejs19
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root
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usr
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lib
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node_modules
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npm
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node_modules.bundled
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events
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tests
📍 /opt/alt/alt-nodejs19/root/usr/lib/node_modules/npm/node_modules.bundled/events/tests
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Editing: prepend.js
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'use strict'; var common = require('./common'); var EventEmitter = require('../'); var assert = require('assert'); var myEE = new EventEmitter(); var m = 0; // This one comes last. myEE.on('foo', common.mustCall(function () { assert.strictEqual(m, 2); })); // This one comes second. myEE.prependListener('foo', common.mustCall(function () { assert.strictEqual(m++, 1); })); // This one comes first. myEE.prependOnceListener('foo', common.mustCall(function () { assert.strictEqual(m++, 0); })); myEE.emit('foo'); // Verify that the listener must be a function assert.throws(function () { var ee = new EventEmitter(); ee.prependOnceListener('foo', null); }, 'TypeError: The "listener" argument must be of type Function. Received type object');
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