009.html | Explore in Territory

<!doctype html>
<title>zero arguments</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
test(function() {
  assert_throws_js(TypeError, function() {
    postMessage();
  });
});
</script>

chromium/third_party/blink/web_tests/external/wpt/webmessaging/without-ports/009.html