cleanup-prevented-with-reference.optional.any.js

Enable keyboard shortcuts

This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /js/builtins/weakrefs/cleanup-prevented-with-reference.optional.any.html - WPT Dashboard Interop Dashboard
- /js/builtins/weakrefs/cleanup-prevented-with-reference.optional.any.worker.html - WPT Dashboard Interop Dashboard

// META: script=/common/gc.js

// META: script=resources/maybe-garbage-collect.js

// ├──> maybeGarbageCollectAndCleanupAsync

// └──> resolveGarbageCollection

/*---

esid: sec-finalization-registry.prototype.cleanupSome

info: |

  FinalizationRegistry.prototype.cleanupSome ( [ callback ] )

  1. Let finalizationRegistry be the this value.

  2. If Type(finalizationRegistry) is not Object, throw a TypeError exception.

  3. If finalizationRegistry does not have a [[Cells]] internal slot, throw a TypeError exception.

  4. If callback is not undefined and IsCallable(callback) is false, throw a TypeError exception.

  5. Perform ? CleanupFinalizationRegistry(finalizationRegistry, callback).

  6. Return undefined.

---*/

let holdingsList = [];

function cb(holding) {

  holdingsList.push(holding);

};

let finalizationRegistry = new FinalizationRegistry(function() {});

let referenced = {};

function emptyCells() {

  let target = {};

  finalizationRegistry.register(target, 'target!');

  finalizationRegistry.register(referenced, 'referenced');

  let prom = maybeGarbageCollectAndCleanupAsync(target);

  target = null;

  return prom;

promise_test(() => {

  return (async () => {

    assert_implements(

      typeof FinalizationRegistry.prototype.cleanupSome === 'function',

      'FinalizationRegistry.prototype.cleanupSome is not implemented.'

);

    await emptyCells();

    finalizationRegistry.cleanupSome(cb);

    assert_equals(holdingsList.length, 1);

    assert_equals(holdingsList[0], 'target!');

    assert_equals(typeof referenced, 'object', 'referenced preserved');

  })().catch(resolveGarbageCollection);

}, 'cleanupCallback has only one optional chance to be called for a GC that cleans up a registered target.');