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// Flags: --expose-gc --no-warnings
'use strict';
// Test that a runtime warning is emitted when a FileHandle object
// is allowed to close on garbage collection. In the future, this
// test should verify that closing on garbage collection throws a
// process fatal exception.
const common = require('../common');
const assert = require('assert');
const { promises: fs } = require('fs');
const warning =
'Closing a FileHandle object on garbage collection is deprecated. ' +
'Please close FileHandle objects explicitly using ' +
'FileHandle.prototype.close(). In the future, an error will be ' +
'thrown if a file descriptor is closed during garbage collection.';
async function doOpen() {
const fh = await fs.open(__filename);
common.expectWarning({
Warning: [[`Closing file descriptor ${fh.fd} on garbage collection`]],
DeprecationWarning: [[warning, 'DEP0137']]
});
return fh;
}
doOpen().then(common.mustCall((fd) => {
assert.strictEqual(typeof fd, 'object');
})).then(common.mustCall(() => {
setImmediate(() => {
// The FileHandle should be out-of-scope and no longer accessed now.
global.gc();
// Wait an extra event loop turn, as the warning is emitted from the
// native layer in an unref()'ed setImmediate() callback.
setImmediate(common.mustCall());
});
}));
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