| // 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-group-constructor |
| description: > |
| If iterator does not have a [[FinalizationGroup]] internal slot, throw a TypeError exception. |
| info: | |
| FinalizationGroup.prototype.cleanupSome ( [ callback ] ) |
| |
| 1. Let finalizationGroup be the this value. |
| ... |
| 5. Perform ! CleanupFinalizationGroup(finalizationGroup, callback). |
| ... |
| |
| CleanupFinalizationGroup ( finalizationGroup [ , callback ] ) |
| |
| ... |
| 3. Let iterator be ! CreateFinalizationGroupCleanupIterator(finalizationGroup). |
| ... |
| 6. Let result be Call(callback, undefined, « iterator »). |
| ... |
| |
| %FinalizationGroupCleanupIteratorPrototype%.next ( ) |
| |
| 1. Let iterator be the this value. |
| 2. If Type(iterator) is not Object, throw a TypeError exception. |
| 3. If iterator does not have a [[FinalizationGroup]] internal slot, throw a TypeError exception. |
| features: [FinalizationGroup, WeakRef, host-gc-required, Symbol] |
| includes: [async-gc.js] |
| flags: [async, non-deterministic] |
| ---*/ |
| |
| var FinalizationGroupCleanupIteratorPrototype; |
| var called = 0; |
| var endOfCall = 0; |
| var fg = new FinalizationGroup(function() {}); |
| |
| function callback(iterator) { |
| called += 1; |
| // Only the iterator itself will have a [[FinalizationGroup]] internal |
| FinalizationGroupCleanupIteratorPrototype = Object.getPrototypeOf(iterator); |
| |
| // It's sensitive the assertions remain inside this function in order to secure |
| // [[IsFinalizationGroupCleanupJobActive]] is true |
| assert.sameValue(typeof FinalizationGroupCleanupIteratorPrototype.next, 'function'); |
| |
| var next = FinalizationGroupCleanupIteratorPrototype.next; |
| |
| assert.throws(TypeError, function() { |
| next.call({}); |
| }, '{}'); |
| |
| assert.throws(TypeError, function() { |
| next.call(FinalizationGroup); |
| }, 'FinalizationGroup'); |
| |
| assert.throws(TypeError, function() { |
| next.call(FinalizationGroupCleanupIteratorPrototype); |
| }, 'FinalizationGroupCleanupIteratorPrototype'); |
| |
| assert.throws(TypeError, function() { |
| next.call(fg); |
| }, 'FinalizationGroup instance'); |
| |
| var wr = new WeakRef({}); |
| assert.throws(TypeError, function() { |
| next.call(wr); |
| }, 'WeakRef instance'); |
| |
| // Abrupt completions are not directly returned. |
| endOfCall += 1; |
| } |
| |
| function emptyCells() { |
| var target = {}; |
| fg.register(target); |
| |
| var prom = asyncGC(target); |
| target = null; |
| |
| return prom; |
| } |
| |
| emptyCells().then(function() { |
| fg.cleanupSome(callback); |
| |
| assert.sameValue(called, 1, 'cleanup successful'); |
| assert.sameValue(endOfCall, 1, 'Abrupt completions are not directly returned.'); |
| }).then($DONE, resolveAsyncGC); |