public void ScenarioATest()
{
//Arrange
var items = new List <Item>()
{
new Item(_a, 1), new Item(_b, 1), new Item(_c, 1)
};
//Act
var cart = new Cart(items, _calculationService.Calculate(items, _promotions));
//Assert
Assert.Equal(100, cart.Total);
}
public CalculationResult Calculate(string expression)
{
return(_engine.Calculate(expression));
}