public void OutingRepository_GetTotalCost_ShouldReturnTotalCost()
{
//Arrange
List <Outings> outingsList = _outingsRepository.GetOutingsList();
Outings outings = new Outings();
outings.TotalCostEvent = 1000m;
_outingsRepository.AddOutingsToList(outings);
Outings outingsTwo = new Outings();
outingsTwo.TotalCostEvent = 500m;
_outingsRepository.AddOutingsToList(outingsTwo);
Outings outingsThree = new Outings();
outingsThree.TotalCostEvent = 250m;
_outingsRepository.AddOutingsToList(outingsThree);
//Act
decimal actual = _outingsRepository.GetTotalCost();
decimal expected = 1750m;
//Assert
Assert.AreEqual(expected, actual);
}