anchor.diff:  }
   
   void testIsHexadecimal() {
  -  test_this({
  +  test({
       'validator': v.isHexadecimal,
       'args': [],
       'valid': [
  
positive.code: }
  
  void testIsAlphanumeric() {
    test_this({
      'validator': v.isAlphanumeric,
      'args': [],
      'valid': [
  
negative.code: 
  import 'package:validator/validator.dart' as v;
  
  void test(Map options) {
    List args = options['args'];
    if (options['valid'] != null) {
      List toTest = options['valid'];
  