public function testBirthday()
{
$person = new Person();
$birthday = new \DateTime('now');
// Day
$person->setBirthday($birthday, 'day');
$verifyDate = $birthday->format('Y-m-d');
$this->assertEquals($verifyDate, $person->getBirthday());
// Month
$person->setBirthday($birthday, 'month');
$verifyDate = $birthday->format('Y-m');
$this->assertEquals($verifyDate, $person->getBirthday());
// Year
$person->setBirthday($birthday, 'year');
$verifyDate = $birthday->format('Y');
$this->assertEquals($verifyDate, $person->getBirthday());
}
