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// |reftest| skip-if(!this.hasOwnProperty('FinalizationRegistry')) async -- FinalizationRegistry is not enabled unconditionally
// Copyright (C) 2019 Leo Balter. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-properties-of-the-finalization-registry-constructor
description: >
Iterates over different type values in holdings
info: |
FinalizationRegistry.prototype.cleanupSome ( [ callback ] )
1. Let finalizationRegistry be the this value.
...
5. Perform ! CleanupFinalizationRegistry(finalizationRegistry, callback).
...
CleanupFinalizationRegistry ( finalizationRegistry [ , callback ] )
...
3. While finalizationRegistry.[[Cells]] contains a Record cell such that cell.[[WeakRefTarget]] is ~empty~, then an implementation may perform the following steps,
a. Choose any such cell.
b. Remove cell from finalizationRegistry.[[Cells]].
c. Perform ? Call(callback, undefined, << cell.[[HeldValue]] >>).
...
features: [FinalizationRegistry.prototype.cleanupSome, FinalizationRegistry, Symbol, host-gc-required]
includes: [async-gc.js]
flags: [async, non-deterministic]
---*/
function check(value, expectedName) {
var holdings = [];
var called = 0;
var finalizationRegistry = new FinalizationRegistry(function() {});
function callback(holding) {
called += 1;
holdings.push(holding);
}
// This is internal to avoid conflicts
function emptyCells(value) {
var target = {};
finalizationRegistry.register(target, value);
var prom = asyncGC(target);
target = null;
return prom;
}
return emptyCells(value).then(function() {
finalizationRegistry.cleanupSome(callback);
assert.sameValue(called, 1, expectedName);
assert.sameValue(holdings.length, 1, expectedName);
assert.sameValue(holdings[0], value, expectedName);
});
}
Promise.all([
check(undefined, 'undefined'),
check(null, 'null'),
check('', 'the empty string'),
check({}, 'object'),
check(42, 'number'),
check(true, 'true'),
check(false, 'false'),
check(Symbol(1), 'symbol'),
]).then(() => $DONE(), resolveAsyncGC);
|
