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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --expose-gc --noincremental-marking
let cleanup_call_count = 0;
let cleanup_holdings_count = 0;
let cleanup = function(holdings) {
assertEquals(holdings, "holdings");
let success = fg.unregister(key);
assertFalse(success);
++cleanup_holdings_count;
++cleanup_call_count;
}
let fg = new FinalizationRegistry(cleanup);
// Create an object and register it in the FinalizationRegistry. The object needs to be inside
// a closure so that we can reliably kill them!
let key = {"k": "this is the key"};
(function() {
let object = {};
fg.register(object, "holdings", key);
// object goes out of scope.
})();
// This GC will discover dirty WeakCells and schedule cleanup.
gc();
assertEquals(0, cleanup_call_count);
// Assert that the cleanup function was called.
let timeout_func = function() {
assertEquals(1, cleanup_call_count);
assertEquals(1, cleanup_holdings_count);
}
setTimeout(timeout_func, 0);
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