workers/Worker-replace-global-constructor.any.js

// META: global=worker
test(() => {
  try {
    self.MessageEvent = 'PASS';
    assert_equals(self.MessageEvent, 'PASS');
  } catch (ex) {
    assert_unreached("FAIL: unexpected exception (" + ex + ") received while replacing global constructor MessageEvent.");
  }
}, 'Test replacing global constructors in a worker context.');