protected function appendSuite($root, TestSuite $suite)
{
$suiteNode = $this->document->createElement("testsuite");
$vars = get_object_vars($suite);
foreach ($vars as $name => $value) {
if (preg_match(static::$suiteAttrs, $name)) {
$suiteNode->setAttribute($name, $value);
}
}
$root->appendChild($suiteNode);
return $suiteNode;
}