PresentationConnectionCloseEvent.https.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Constructing a PresentationConnectionCloseEvent</title>
<link rel="author" title="mark a. foltz" href="https://github.com/mfoltzgoogle">
<link rel="help" href="http://w3c.github.io/presentation-api/#controlling-user-agent">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<script>
  test(() => {
    let eventWithMessage, eventWithoutMessage;
    for (let reason of ["error", "closed", "wentaway"]) {
      eventWithMessage = new PresentationConnectionCloseEvent("close", {reason: reason, message: "A message" });
      assert_equals(eventWithMessage.type, "close");
      assert_equals(eventWithMessage.reason, reason);
      assert_equals(eventWithMessage.message, "A message");

      eventWithoutMessage = new PresentationConnectionCloseEvent("close", {reason: reason});
      assert_equals(eventWithoutMessage.type, "close");
      assert_equals(eventWithoutMessage.reason, reason);
      assert_equals(eventWithoutMessage.message, "");
    }
  });
</script>

chromium/third_party/blink/web_tests/external/wpt/presentation-api/controlling-ua/PresentationConnectionCloseEvent.https.html