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Diffstat (limited to 'js/src/tests/test262/built-ins/FinalizationRegistry/shell.js')
-rw-r--r-- | js/src/tests/test262/built-ins/FinalizationRegistry/shell.js | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/FinalizationRegistry/shell.js b/js/src/tests/test262/built-ins/FinalizationRegistry/shell.js new file mode 100644 index 0000000000..b4d29ea4e9 --- /dev/null +++ b/js/src/tests/test262/built-ins/FinalizationRegistry/shell.js @@ -0,0 +1,83 @@ +// GENERATED, DO NOT EDIT +// file: async-gc.js +// Copyright (C) 2019 Ecma International. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +description: > + Collection of functions used to capture references cleanup from garbage collectors +features: [FinalizationRegistry.prototype.cleanupSome, FinalizationRegistry, Symbol, async-functions] +flags: [non-deterministic] +defines: [asyncGC, asyncGCDeref, resolveAsyncGC] +---*/ + +function asyncGC(...targets) { + var finalizationRegistry = new FinalizationRegistry(() => {}); + var length = targets.length; + + for (let target of targets) { + finalizationRegistry.register(target, 'target'); + target = null; + } + + targets = null; + + return Promise.resolve('tick').then(() => asyncGCDeref()).then(() => { + var names = []; + + // consume iterator to capture names + finalizationRegistry.cleanupSome(name => { names.push(name); }); + + if (!names || names.length != length) { + throw asyncGC.notCollected; + } + }); +} + +asyncGC.notCollected = Symbol('Object was not collected'); + +async function asyncGCDeref() { + var trigger; + + // TODO: Remove this when $262.clearKeptObject becomes documented and required + if ($262.clearKeptObjects) { + trigger = $262.clearKeptObjects(); + } + + await $262.gc(); + + return Promise.resolve(trigger); +} + +function resolveAsyncGC(err) { + if (err === asyncGC.notCollected) { + // Do not fail as GC can't provide necessary resources. + $DONE(); + return; + } + + $DONE(err); +} + +// file: isConstructor.js +// Copyright (C) 2017 André Bargull. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +description: | + Test if a given function is a constructor function. +defines: [isConstructor] +features: [Reflect.construct] +---*/ + +function isConstructor(f) { + if (typeof f !== "function") { + throw new Test262Error("isConstructor invoked with a non-function value"); + } + + try { + Reflect.construct(function(){}, [], f); + } catch (e) { + return false; + } + return true; +} |