src/starboard/evergreen/testing/tests/test.html

<!DOCTYPE html>
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<html>
<meta charset="utf-8">
<title>test</title>
<script>
  var changeChannel = null;
  var targetChannel = null;

  function tryChangeChannel() {
    const currentChannel = window.h5vcc.updater.getUpdaterChannel();
    const status = window.h5vcc.updater.getUpdateStatus();

    if ((currentChannel == "") ||
        ((status != "App is up to date") &&
         (status != "Update installed, pending restart"))) {
      return;
    }

    if (currentChannel == "prod") {
      window.h5vcc.updater.setUpdaterChannel(targetChannel);
      console.log("channel was changed to " + targetChannel);
      return;
    }

    if (status == "Update installed, pending restart") {
      clearInterval(changeChannel);
      console.log("update from " + currentChannel + " channel was installed");
      return;
    }
  }

  var query = window.location.search;

  if (query) {
    // Splits each parameter of the query into an array after removing the
    // prepended "?".
    query = query.slice(1).split("&");
  }

  query.forEach(part => {
    if (part.startsWith("min_storage=")) {
      window.h5vcc.settings.set("Updater.MinFreeSpaceBytes", part.split("=")[1]);
    }
    if (changeChannel) {
      return;
    }

    if (part.startsWith("channel=")) {
      targetChannel = part.split("=")[1];
      changeChannel = setInterval(tryChangeChannel, 500);
    }

  });
</script>
</html>