import 'package:flutter_test/flutter_test.dart'; import 'package:ansu_ui/ansu_ui.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); }); }