public function testConstruct()
{
$oPhpPresentation = new PhpPresentation();
$oPhpPresentation->getActiveSlide()->createDrawingShape();
$object = new ODPresentation($oPhpPresentation);
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\PhpPresentation', $object->getPhpPresentation());
$this->assertEquals('./', $object->getDiskCachingDirectory());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\HashTable', $object->getDrawingHashTable());
}