Validating a string contains a substring

import 'package:luthor/luthor.dart';

void main() {
  final validator = l.string().contains('World');
  print(validator.validateValue('Hello World!'));
}

import 'package:luthor/luthor.dart';
import 'package:freezed_annotation/freezed_annotation.dart';

part 'contains.freezed.dart';
part 'contains.g.dart';

@luthor
@freezed
abstract class ContainsSchema with _$ContainsSchema {
  const factory ContainsSchema({
    @Contains('World') required String value,
  }) = _ContainsSchema;

  factory ContainsSchema.fromJson(Map<String, dynamic> json) =>
      _$ContainsSchemaFromJson(json);
}

void main() {
  final result = $ContainsSchemaValidate({'value': 'Hello World!'});

  switch (result) {
    case SchemaValidationSuccess(data: final data):
      print('✅ Valid: ${data.value}');
    case SchemaValidationError(errors: final errors):
      print('❌ Errors: $errors');
  }
}