public void should_handle_null_shopping_carts()
{
var calculator = new NetValueCalculator();
var value = calculator.GetNetValue(null);
value.Should().BeApproximately(0, 0.005m);
}
public void zero_items_gives_zero_value()
{
var shoppingCart = new List <Tuple <decimal, int> >
{
new Tuple <decimal, int>(100, 0)
};
var calculator = new NetValueCalculator();
var value = calculator.GetNetValue(shoppingCart);
value.Should().BeApproximately(0, 0.005m);
}
public void applies_10_percent_discount()
{
var shoppingCart = new List <Tuple <decimal, int> >
{
new Tuple <decimal, int>(200.01m, 1)
};
var calculator = new NetValueCalculator();
var value = calculator.GetNetValue(shoppingCart);
value.Should().BeApproximately(180.01m, 0.005m);
}
public void should_sum_all_items_in_the_shopping_cart()
{
var shoppingCart = new List <Tuple <decimal, int> >
{
new Tuple <decimal, int>(10, 1),
new Tuple <decimal, int>(10, 1)
};
var calculator = new NetValueCalculator();
var value = calculator.GetNetValue(shoppingCart);
value.Should().BeApproximately(20, 0.005m);
}
