public void GetHashCodeReturnsCorrectResult(
string name,
double unitPriceD,
int quantity)
{
var unitPrice = (decimal)unitPriceD;
var sut = new BasketItem(name, unitPrice, quantity);
var actual = sut.GetHashCode();
var expected =
name.GetHashCode() ^
unitPrice.GetHashCode() ^
quantity.GetHashCode();
Assert.Equal(expected, actual);
}