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508890d795
PR-URL: https://github.com/nodejs/node/pull/39928 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>
48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
/* eslint-disable node-core/require-common-first, node-core/required-modules */
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'use strict';
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// Ordinarily test files must require('common') but that action causes
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// the global console to be compiled, defeating the purpose of this test.
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const assert = require('assert');
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const EventEmitter = require('events');
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const leakWarning = /EventEmitter memory leak detected\. 2 hello listeners/;
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let writeTimes = 0;
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let warningTimes = 0;
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process.on('warning', () => {
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// This will be called after the default internal
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// process warning handler is called. The default
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// process warning writes to the console, which will
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// invoke the monkeypatched process.stderr.write
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// below.
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assert.strictEqual(writeTimes, 1);
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EventEmitter.defaultMaxListeners = oldDefault;
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warningTimes++;
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});
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process.on('exit', () => {
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assert.strictEqual(warningTimes, 1);
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});
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process.stderr.write = (data) => {
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if (writeTimes === 0)
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assert.match(data, leakWarning);
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else
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assert.fail('stderr.write should be called only once');
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writeTimes++;
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};
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const oldDefault = EventEmitter.defaultMaxListeners;
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EventEmitter.defaultMaxListeners = 1;
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const e = new EventEmitter();
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e.on('hello', () => {});
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e.on('hello', () => {});
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// TODO: Figure out how to validate console. Currently,
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// there is no obvious way of validating that console
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// exists here exactly when it should.
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