$session = JFactory::getApplication()->getSession();
# Clear session
$session->clear('__ns');
$session->clear('ns');

echo "Set wow without namespace ns\n";
$session->set('wow', 'xxx');
echo "Check wow without namespace\n";
if ($session->has('wow')) {
  echo "Good\n";
} else {
  echo "FAIL\n";
}
var_dump($session->get('wow', 'xxx'));
$session->clear('wow');

echo "Set wow with namespace ns and j3 syntax \n";
$session->set('wow', 'xxx', 'ns');
echo "check wow with j3 syntax \n";
if ($session->has('wow','ns')) {
  echo "Good\n";
} else {
  echo "FAIL\n";
}
var_dump($session->get('wow', 'not found', 'ns'));
if ($session->has('ns.wow')) {
  echo "Good\n";
} else {
  echo "FAIL\n";
}
var_dump($session->get('ns.wow', 'not found'));
$session->clear('wow', 'ns');
$session->clear('ns');

echo "Set __ns.wow for j3 session simulation \n";
$session->set('__ns.wow', 'xxx');
echo "check wow with j3 syntax \n";
if ($session->has('wow','ns')) {
  echo "Good\n";
} else {
  echo "FAIL\n";
}
var_dump($session->get('wow', 'not found', 'ns'));
echo "check wow with j4 syntax and underscore prefixed (normally not used) \n";
if ($session->has('__ns.wow')) {
  echo "Good\n";
} else {
  echo "FAIL\n";
}
var_dump($session->get('__ns.wow', 'not found'));
echo "check wow with j4 syntax\n";
if ($session->has('ns.wow')) {
  echo "Good\n";
} else {
  echo "FAIL\n";
}
var_dump($session->get('ns.wow', 'not found'));