/**
* test the ssn method of UsValidation
*
* @return void
*/
public function testSsn()
{
$this->assertFalse(UsValidation::personId('11-33-4333'));
$this->assertFalse(UsValidation::personId('113-3-4333'));
$this->assertFalse(UsValidation::personId('111-33-333'));
$this->assertTrue(UsValidation::personId('111-33-4333'));
}