nodejs/test/parallel/test-fs-filehandle.js

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// Flags: --expose-gc --no-warnings --expose-internals
'use strict';
const common = require('../common');
const path = require('path');
const fs = process.binding('fs');
const { stringToFlags } = require('internal/fs');
// Verifies that the FileHandle object is garbage collected and that a
// warning is emitted if it is not closed.
let fdnum;
{
fdnum = fs.openFileHandle(path.toNamespacedPath(__filename),
stringToFlags('r'), 0o666).fd;
}
common.expectWarning(
'Warning',
`Closing file descriptor ${fdnum} on garbage collection`
);
gc(); // eslint-disable-line no-undef
setTimeout(() => {}, 10);