protected static function add_suite($name = self::DEFAULT_SUITE_NAME)
{
$inc = 0;
$orig_name = $name;
while (array_key_exists($name, static::$suites)) {
$inc++;
$name = "{$orig_name}_" . $inc;
}
$suite = new FUnit\TestSuite($name);
static::$suites[$name] = $suite;
return $suite;
}