shared-struct-postMessage.https.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
// Test serialization of shared structs and shared strings.
async_test(t => {
  let worker = new Worker('resources/worker.js');

  const Box = new SharedStructType(['payload']);
  let box = new Box();
  box.payload = 'hello from main';

  worker.onmessage = t.step_func_done(function (e) {
    assert_equals(box.payload, 'hello from worker');
  });

  worker.postMessage(box);
});
</script>

chromium/third_party/blink/web_tests/wpt_internal/js/shared_memory/shared-struct-postMessage.https.html