content: import '../../interpreter_test.dart';
  import 'package:test/test.dart';
  
  void main() {
    group('StringSink methods - comprehensive', () {
      test('write', () {
        const source = '''
        main() {
          StringBuffer buffer = StringBuffer();
          buffer.write("hello");
          return buffer.toString();
        }
        ''';
        expect(execute(source), equals('hello'));
      });
  
      test('writeln', () {
        const source = '''
        main() {
          StringBuffer buffer = StringBuffer();
          buffer.writeln("hello");
          buffer.writeln("world");
          return buffer.toString();
        }
        ''';
        expect(execute(source), equals('hello\nworld\n'));
      });
  
      test('writeAll', () {
        const source = '''
        main() {
          StringBuffer buffer = StringBuffer();
          buffer.writeAll(["hello", "world"], " ");
          return buffer.toString();
        }
        ''';
        expect(execute(source), equals('hello world'));
      });
  
      test('writeCharCode', () {
        const source = '''
        main() {
          StringBuffer buffer = StringBuffer();
          buffer.writeCharCode(104); // 'h'
          buffer.writeCharCode(101); // 'e'
          buffer.writeCharCode(108); // 'l'
          buffer.writeCharCode(108); // 'l'
          buffer.writeCharCode(111); // 'o'
          return buffer.toString();
        }
        ''';
        expect(execute(source), equals('hello'));
      });
    });
  }
  