public void AddMoreUnitsForTheSameSku()
{
var checkout = new Checkout();
checkout.AddUnit(_testSkuId, _testNumberOfUnits);
checkout.AddUnit(_testSkuId, _testNumberOfUnits);
var firstUnit = checkout.Units.Single();
Assert.Equal(_testSkuId, firstUnit.SkuId);
Assert.Equal(_testNumberOfUnits * 2, firstUnit.NumberOfUnits);
}
public async Task <int> AddUnits(Checkout checkout, int skuId, int numberOfUnits = 1)
{
Guard.Against.NegativeOrZero(numberOfUnits, nameof(numberOfUnits));
var totalUnits = checkout.AddUnit(skuId, numberOfUnits);
await _checkoutRepository.UpdateAsync(checkout);
return(totalUnits);
}
public void AddNewUnit()
{
var checkout = new Checkout();
int numberOfUnitsReturned = checkout.AddUnit(_testSkuId, _testNumberOfUnits);
var firstUnit = checkout.Units.Single();
Assert.Equal(_testSkuId, firstUnit.SkuId);
Assert.Equal(_testNumberOfUnits, firstUnit.NumberOfUnits);
Assert.Equal(_testNumberOfUnits, numberOfUnitsReturned);
}