// import 'package:flutter_test/flutter_test.dart';

// import 'package:text_editor/text_editor.dart';

// void main() {
//   test('adds one to input values', () {
//     final calculator = Calculator();
//     expect(calculator.addOne(2), 3);
//     expect(calculator.addOne(-7), -6);
//     expect(calculator.addOne(0), 1);
//     expect(() => calculator.addOne(null), throwsNoSuchMethodError);
//   });
// }
