JeroenDesloovere\VCard\VCard::getFilename PHP Method

    public function getFilename()
    {
        if (!$this->filename) {
            return 'unknown';
        }
        return $this->filename;
    }

 /**
  * Test special first name and last name
  */
 public function testSpecialFirstNameAndLastName2()
 {
     $this->vcard->addName($this->lastName3, $this->firstName3);
     $this->assertEquals('garcon-jeroen', $this->vcard->getFilename());
 }