public function testProperties()
{
$object = new PhpPresentation();
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentProperties', $object->getProperties());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentProperties', $object->getDocumentProperties());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\PhpPresentation', $object->setProperties(new DocumentProperties()));
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentProperties', $object->getProperties());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentProperties', $object->getDocumentProperties());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\PhpPresentation', $object->setDocumentProperties(new DocumentProperties()));
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentProperties', $object->getProperties());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\DocumentProperties', $object->getDocumentProperties());
}