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| Current File : //proc/self/root/home/ubuntu/node-v16.18.1/test/parallel/test-global-console-exists.js |
/* eslint-disable node-core/require-common-first, node-core/required-modules */
'use strict';
// Ordinarily test files must require('common') but that action causes
// the global console to be compiled, defeating the purpose of this test.
const assert = require('assert');
const EventEmitter = require('events');
const leakWarning = /EventEmitter memory leak detected\. 2 hello listeners/;
let writeTimes = 0;
let warningTimes = 0;
process.on('warning', () => {
// This will be called after the default internal
// process warning handler is called. The default
// process warning writes to the console, which will
// invoke the monkeypatched process.stderr.write
// below.
assert.strictEqual(writeTimes, 1);
EventEmitter.defaultMaxListeners = oldDefault;
warningTimes++;
});
process.on('exit', () => {
assert.strictEqual(warningTimes, 1);
});
process.stderr.write = (data) => {
if (writeTimes === 0)
assert.match(data, leakWarning);
else
assert.fail('stderr.write should be called only once');
writeTimes++;
};
const oldDefault = EventEmitter.defaultMaxListeners;
EventEmitter.defaultMaxListeners = 1;
const e = new EventEmitter();
e.on('hello', () => {});
e.on('hello', () => {});
// TODO: Figure out how to validate console. Currently,
// there is no obvious way of validating that console
// exists here exactly when it should.
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