| // Copyright (C) 2019 Leo Balter. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-finalization-registry.prototype.cleanupSome |
| description: Cleanup might be prevented with a reference usage; |
| 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. |
| features: [FinalizationRegistry, host-gc-required] |
| includes: [async-gc.js] |
| flags: [async, non-deterministic] |
| ---*/ |
| |
| var holdingsList; |
| function cb(iterator) { |
| holdingsList = [...iterator]; |
| }; |
| var finalizationRegistry = new FinalizationRegistry(function() {}); |
| |
| var referenced = {}; |
| |
| function emptyCells() { |
| var target = {}; |
| finalizationRegistry.register(target, 'target!'); |
| finalizationRegistry.register(referenced, 'referenced'); |
| |
| var prom = asyncGC(target); |
| target = null; |
| |
| return prom; |
| } |
| |
| emptyCells().then(function() { |
| finalizationRegistry.cleanupSome(cb); |
| |
| assert.sameValue(holdingsList.length, 1); |
| assert.sameValue(holdingsList[0], 'target!'); |
| |
| assert.sameValue(typeof referenced, 'object', 'referenced preserved'); |
| }).then($DONE, resolveAsyncGC); |