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chromium/third_party/blink/web_tests/virtual/presentation/receiver/presentation-receiver.html 

<!DOCTYPE html>
<html>
<body>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script>

test(t => {
  assert_true('receiver' in navigator.presentation);
}, "Test that presentation.receiver is present.")

test(t => {
  assert_not_equals(navigator.presentation.receiver, null);
}, "Test that presentation.receiver returns non-null when the setting is set.");

test(t => {
  assert_equals(typeof(navigator.presentation.receiver), "object");
  assert_true('connectionList' in navigator.presentation.receiver);
  assert_equals(typeof(navigator.presentation.receiver.connectionList), "object");
}, "Test the Presentation Receiver API properties types and presence.");

</script>
</body>
</html>