mirror of https://github.com/tc39/test262.git
47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
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// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --harmony-weak-refs --expose-gc --noincremental-marking --allow-natives-syntax
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let cleanup_called = false;
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let cleanup = function(iter) {
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assertFalse(cleanup_called);
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let count = 0;
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for (wc of iter) {
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++count;
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assertEquals(wr, wc);
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assertEquals(undefined, wc.deref());
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}
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assertEquals(1, count);
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cleanup_called = true;
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}
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let wf = new WeakFactory(cleanup);
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let wr;
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(function() {
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let o = {};
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wr = wf.makeRef(o);
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// Don't deref here, we want to test that the creation is enough to keep the
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// WeakRef alive until the end of the turn.
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})();
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gc();
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// Since the WeakRef was created during this turn, it is not cleared by GC.
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(function() {
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assertNotEquals(undefined, wr.deref());
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})();
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%RunMicrotasks();
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// Next turn.
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assertFalse(cleanup_called);
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gc();
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%RunMicrotasks();
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// Next turn.
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assertTrue(cleanup_called);
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