tests/lib/isolate/weak_reference_message_3_test.dart

// Copyright (c) 2026, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// VMOptions=
// VMOptions=--gc_on_foc_slow_path

import "dart:isolate";
import "dart:typed_data";

import "package:expect/async_helper.dart";
import "package:expect/expect.dart";

main() {
  asyncStart();
  var port;
  port = new RawReceivePort((message) {
    var weakRef = message[0] as WeakReference;
    var large = message[1] as Uint8List;
    var largeFromWeak = weakRef.target as Uint8List;
    Expect.equals(large.length, 1 << 20);
    Expect.equals(largeFromWeak.length, 1 << 20);
    Expect.identical(large, largeFromWeak);

    port.close();
    asyncEnd();
  });

  var key = new Object();
  var large = Uint8List(1 << 20);
  var weakRef = new WeakReference(large);

  port.sendPort.send([weakRef, large]);
}