client-hints/sec-ch-ua.https.html

<!DOCTYPE html>
<head>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
  var minor = "";
  promise_test(t => {
    return new Promise((resolve, reject) => {
      var w;
      window.onmessage = e => {
        try {
          assert_not_equals(e.data.header, "", "The `Sec-CH-UA` header is delivered.");
          minor = e.data.header;
        } catch (ex) {
          reject(ex);
        }
        w.close();
        resolve();
      };
      w = window.open("./resources/sec-ch-ua.py");
    });
  }, "Open HTTPS window prior to opt-in: `Sec-CH-UA` header with minor version.")

  promise_test(t => {
    return new Promise((resolve, reject) => {
      var w;
      window.onmessage = e => {
        try {
          assert_not_equals(e.data.header, "", "The `Sec-CH-UA` header is delivered.");
          assert_not_equals(e.data.header, minor, "The `Sec-CH-UA` header is different after the opt-in than before.");
        } catch (ex) {
          reject(ex);
        }
        w.close();
        resolve();
      };
      w = window.open("./resources/sec-ch-ua.py");
    });
  }, "Open HTTPS window post-opt-in: `Sec-CH-UA` header with minor version.")
</script>
</head>