public function testDataLabelNumFormat()
{
$object = new Series();
$this->assertEmpty($object->getDlblNumFormat());
$this->assertFalse($object->hasDlblNumFormat());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Series', $object->setDlblNumFormat('#%'));
$this->assertEquals('#%', $object->getDlblNumFormat());
$this->assertTrue($object->hasDlblNumFormat());
$this->assertInstanceOf('PhpOffice\\PhpPresentation\\Shape\\Chart\\Series', $object->setDlblNumFormat());
$this->assertEmpty($object->getDlblNumFormat());
$this->assertFalse($object->hasDlblNumFormat());
}