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// META: script=/common/gc.js
// META: script=resources/maybe-garbage-collect.js
// ├──> maybeGarbageCollectAndCleanupAsync
// └──> resolveGarbageCollection
/*---
esid: sec-properties-of-the-finalization-registry-constructor
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]] >>).
---*/
function check(value, expectedName) {
let holdings = [];
let called = 0;
let finalizationRegistry = new FinalizationRegistry(function() {});
function callback(holding) {
called += 1;
holdings.push(holding);
}
// This is internal to avoid conflicts
function emptyCells(value) {
let target = {};
finalizationRegistry.register(target, value);
let prom = maybeGarbageCollectAndCleanupAsync(target);
target = null;
return prom;
}
return emptyCells(value).then(function() {
finalizationRegistry.cleanupSome(callback);
assert_equals(called, 1, expectedName);
assert_equals(holdings.length, 1, expectedName);
assert_equals(holdings[0], value, expectedName);
});
}
test(() =>
assert_implements(
typeof FinalizationRegistry.prototype.cleanupSome === 'function',
'FinalizationRegistry.prototype.cleanupSome is not implemented.'
), 'Requires FinalizationRegistry.prototype.cleanupSome');
promise_test(() => check(undefined, 'undefined'), '`undefined` as registered holding value');
promise_test(() => check(null, 'null'), '`null` as registered holding value');
promise_test(() => check('', 'the empty string'), '`""` as registered holding value');
promise_test(() => check({}, 'object'), '`{}` as registered holding value');
promise_test(() => check(42, 'number'), '`42` as registered holding value');
promise_test(() => check(true, 'true'), '`true` as registered holding value');
promise_test(() => check(false, 'false'), '`false` as registered holding value');
promise_test(() => check(Symbol(1), 'symbol'), '`Symbol(1)` as registered holding value');
|
