content: import '../../interpreter_test.dart';
  import 'package:test/test.dart';
  
  void main() {
    group('Base64 methods - comprehensive', () {
      test('Base64Codec encode', () {
        const source = '''
        import 'dart:convert';
        main() {
          Base64Codec codec = Base64Codec();
          return codec.encode([104, 101, 108, 108, 111]); // "hello"
        }
        ''';
        expect(execute(source), equals('aGVsbG8='));
      });
  
      test('Base64Codec decode', () {
        const source = '''
        import 'dart:convert';
        main() {
          Base64Codec codec = Base64Codec();
          return codec.decode("aGVsbG8="); // "hello"
        }
        ''';
        expect(execute(source), equals([104, 101, 108, 108, 111]));
      });
  
      test('Base64Encoder convert', () {
        const source = '''
        import 'dart:convert';
        main() {
          Base64Encoder encoder = Base64Encoder();
          return encoder.convert([104, 101, 108, 108, 111]); // "hello"
        }
        ''';
        expect(execute(source), equals('aGVsbG8='));
      });
  
      test('Base64Decoder convert', () {
        const source = '''
        import 'dart:convert';
        main() {
          Base64Decoder decoder = Base64Decoder();
          return decoder.convert("aGVsbG8="); // "hello"
        }
        ''';
        expect(execute(source), equals([104, 101, 108, 108, 111]));
      });
  
      test('Base64Codec normalize', () {
        const source = '''
        import 'dart:convert';
        main() {
          Base64Codec codec = Base64Codec();
          return codec.normalize("aGVsbG8="); // "aGVsbG8="
        }
        ''';
        expect(execute(source), equals('aGVsbG8='));
      });
    });
  }
  