import 'package:tdd_katas/string_calculator.dart';
import 'package:test/test.dart';

void main() {
  group('String Calculator - Bug Hunt', () {
    late StringCalculator calculator;

    setUp(() {
      calculator = StringCalculator();
    });

    test('empty string returns 0', () {
      expect(calculator.add(''), equals(0));
    });

    test('single number returns that number', () {
      expect(calculator.add('5'), equals(5));
      expect(calculator.add('42'), equals(42));
    });

    test('two comma-delimited numbers return sum', () {
      expect(calculator.add('1,2'), equals(3));
      expect(calculator.add('10,20'), equals(30));
    });

    test('multiple comma-delimited numbers return sum', () {
      expect(calculator.add('1,2,3'), equals(6));
      expect(calculator.add('5,10,15,20'), equals(50));
    });

    test('custom delimiter works correctly', () {
      expect(calculator.add('//;\n1;2'), equals(3));
      expect(calculator.add('//|\n10|20|30'), equals(60));
    });

    test('numbers greater than 1000 are ignored', () {
      expect(calculator.add('2,1001'), equals(2));
      expect(calculator.add('1000,1001,2'), equals(1002));
    });
  });
}