public void MatchesSingleSelectionCost() { DistinctBookSelection selection = new DistinctBookSelection(1, 2, 3); decimal expectedCost = selection.CalculateCost(); BookSelectionGroup group = new BookSelectionGroup(selection); Assert.Equal(expectedCost, group.CalculateTotalCost()); }
public void TallySelectionCosts() { var selection = new[] { new DistinctBookSelection(1, 2), new DistinctBookSelection(2, 3), new DistinctBookSelection(3, 4) }; decimal expectedCost = selection.Sum(selection => selection.CalculateCost()); BookSelectionGroup group = new BookSelectionGroup(selection); Assert.Equal(expectedCost, group.CalculateTotalCost()); }
public void Returns0GivenNoSelections() { BookSelectionGroup group = new BookSelectionGroup(); Assert.Equal(0m, group.CalculateTotalCost()); }