Cake\Localized\Validation\RuValidation::passport PHP Method

    public static function passport($check)
    {
        $pattern = '/^\\d{4} \\d{6}$/';
        return (bool) preg_match($pattern, $check);
    }

 /**
  * test passport method of RuValidation
  *
  * @return void
  */
 public function testPassport()
 {
     $this->assertTrue(RuValidation::passport('1234 123456'));
     $this->assertFalse(RuValidation::passport('1234 1234567'));
     $this->assertFalse(RuValidation::passport('1234123456'));
     $this->assertFalse(RuValidation::passport('1234 1x3456'));
 }