public void GetOldestPersonsInCity_for_Chester_has_5_with_same_age() { var oldestInChester = _statistics.GetOldestPersonsInCity("Chester"); Debug.WriteLine($"{oldestInChester.Count} persons are born on {oldestInChester.FirstOrDefault()?.DateOfBirth}"); Assert.AreEqual(5, oldestInChester.Count); }