public void TotalCostAllOutings_ReturningHasValue()
{
Outing _outing = new Outing();
OutingsRepository _repo = new OutingsRepository();
_outing.Attendance = 50;
_outing.CostPerPerson = 60;
_repo.AddToList(_outing);
int totalSum = _repo.TotalCostAllOutings();
bool sumHasGirth = (totalSum > 0);
Assert.IsTrue(sumHasGirth);
}