tdt.dart

tdt.dart

int function(int input) {
  if (input == 0) {
    return 0;
  }
  
  if (input % 2 == 0) {
    return 2;
  } else {
    return 1;
  }
}

typedef _Input = int;
typedef _Expected = int;

void main() async {
  <String, Tuple2<_Input, _Expected>>{
    'value is zero': Tuple2(0, 0),
    'value is odd': Tuple2(5, 0),
    'value is even': Tuple2(2, 2),
  }.forEach((title, testCase) {
    final input = testCase.item1;
    final expected = testCase.item2;
    
    test('function $title', () {
      expect(function(input), expected);
    });
  });
}

class Tuple2<T1, T2> {
  Tuple2(this.item1, this.item2);
  
  final T1 item1;
  final T2 item2;
}

void test(String title, void Function() body) {
  print('TEST: $title');
  body();
}

void expect(dynamic actual, dynamic expected) {
  if (actual != expected) {
    print('FAILED ACTUAL: $actual, EXPECTED: $expected');
  } else {
    print('PASSED');
  }
}