chromium/third_party/blink/web_tests/external/wpt/workers/WorkerLocation_host.htm

<!DOCTYPE html>
<title> WorkerLocation URL decomposition IDL attribute: host </title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id=log></div>
<script>
async_test(function(t) {
  var worker = new Worker('./support/WorkerLocation.js');
  worker.onmessage = t.step_func_done(function(e) {
    assert_equals(e.data.host, location.host);
  });
});
</script>