public function testNormalize($documentElement, $namespace, $dtdPath, $input, $expectedOutput, $expectedSaved)
{
$normalizer = $this->getNormalizer($documentElement, $namespace, $dtdPath);
$output = $normalizer->normalize($input);
$this->assertEquals($expectedOutput, $output);
$normalizedDocument = new DOMDocument();
$normalizedDocument->loadXML($output, LIBXML_NOENT);
$expectedDocument = new DOMDocument();
$expectedDocument->loadXML($expectedSaved, LIBXML_NOENT);
$this->assertEquals($expectedDocument, $normalizedDocument);
}