public function testStandardProductId()
{
$xml = new \XMLWriter();
$xml->openMemory();
$xml->setIndent(true);
$xml->setIndentString("\t");
$node = new StandardProductId('UPC', 12345678);
$node->setType('UPC')->setValue(12345678);
$node->writeXml($xml, 'StandardProductID');
$dom = new \DOMDocument();
$dom->loadXML($xml->outputMemory(true));
$this->assertTrue($dom->schemaValidate(__DIR__ . '/../../../../XSD/DataType.xsd'));
}
