public function testRender()
{
$oPhpPresentation = new PhpPresentation();
$oXMLDoc = TestHelperDOCX::getDocument($oPhpPresentation, 'PowerPoint2007');
$this->assertTrue($oXMLDoc->fileExists('ppt/tableStyles.xml'));
$element = '/a:tblStyleLst';
$this->assertTrue($oXMLDoc->elementExists($element, 'ppt/tableStyles.xml'));
$this->assertEquals('{5C22544A-7EE6-4342-B048-85BDC9FD1C3A}', $oXMLDoc->getElementAttribute($element, 'def', 'ppt/tableStyles.xml'));
}