public function testFeatureThumbnail()
{
$imagePath = PHPPRESENTATION_TESTS_BASE_DIR . DIRECTORY_SEPARATOR . 'resources' . DIRECTORY_SEPARATOR . 'images' . DIRECTORY_SEPARATOR . 'PhpPresentationLogo.png';
$oPhpPresentation = new PhpPresentation();
$oPhpPresentation->getPresentationProperties()->setThumbnailPath($imagePath);
$oXMLDoc = TestHelperDOCX::getDocument($oPhpPresentation, 'PowerPoint2007');
$this->assertTrue($oXMLDoc->fileExists('docProps/thumbnail.jpeg'));
}