public void OutingsRepository_AddToCostList_ShouldIncreaseCountByOne() { Outings royalPin = new Outings(EventType.Bowling, 15, "6/23/2018", 23.00m, 345.0m); _totalCostList.AddToCostList(royalPin.TotalEventCost); var actual = _totalCostList.GetDecimalList().Count; var expected = 1; Assert.AreEqual(expected, actual); }