public function testBankCardId()
{
$result = SimpleValidator::bankCardId("1234567890123456");
$this->assertEquals(true, $result);
$result = SimpleValidator::bankCardId("1234567890123456789");
$this->assertEquals(true, $result);
$result = SimpleValidator::bankCardId("12345678901234");
$this->assertEquals(false, $result);
$result = SimpleValidator::bankCardId("12345678901234567ww");
$this->assertEquals(false, $result);
}
