public void AddItem_throws_InvalidOperationException_if_sale_cancelled()
{
var sale = new Sale(SaleState.Cancelled);
var saleItem = new SaleItem(price: 1.00M);
Assert.Throws <InvalidOperationException>(() => SaleStateManager.Fire(sale, SaleEvent.AddItem, saleItem));
}
public void AddPayment_throws_InvalidOperationException_if_sale_complete()
{
var sale = new Sale(SaleState.Completed);
var payment = new Payment(amount: 1.00M);
Assert.Throws <InvalidOperationException>(() => SaleStateManager.Fire(sale, SaleEvent.AddPayment, payment));
}
public void AddPayment_while_Open_adds_payment_to_sale()
{
var sale = new Sale();
const decimal paymentAmount = 1.23M;
SaleStateManager.Fire(sale, SaleEvent.AddPayment, new Payment(paymentAmount));
Assert.Equal(-paymentAmount, sale.Balance);
}
public void AddPayment_on_Open_sale_sets_state_Completed_if_items_delivered_and_0_balance()
{
var sale = new Sale();
SaleStateManager.Fire(sale, SaleEvent.AddItem, new SaleItem(price: 1.00M, state: SaleItemState.Delivered));
SaleStateManager.Fire(sale, SaleEvent.AddPayment, new Payment(amount: 1.00M));
Assert.Equal(SaleState.Completed, sale.State);
}
public void GiveChange_throws_InvalidOperationException_when_amount_exceeds_balance()
{
var sale = new Sale(SaleState.Authorized)
{
Balance = -1
};
Assert.Throws <InvalidOperationException>(() => SaleStateManager.Fire(sale, SaleEvent.ChangeGiven, new ChangeTransaction(5.55M)));
}
public void AddPayment_on_Open_sale_leaves_state_Open_if_0_items()
{
var sale = new Sale();
var payment = new Payment(amount: 1.00M);
SaleStateManager.Fire(sale, SaleEvent.AddPayment, payment);
Assert.Equal(SaleState.Opened, sale.State);
}
public void Cancel_on_Authorized_goes_to_Cancelled()
{
var sale = new Sale();
SaleStateManager.Fire(sale, SaleEvent.AddItem, new SaleItem(price: 2.22M));
SaleStateManager.Fire(sale, SaleEvent.AddPayment, new Payment(amount: 5.00M));
SaleStateManager.Fire(sale, SaleEvent.Cancel);
Assert.Equal(SaleState.Cancelled, sale.State);
}
public void GiveChange_updates_balance()
{
var sale = new Sale();
SaleStateManager.Fire(sale, SaleEvent.AddItem, new SaleItem(price: 4.55M));
SaleStateManager.Fire(sale, SaleEvent.AddPayment, new Payment(amount: 5.00M));
Assert.True(SaleStateManager.IsInState(sale, SaleState.Authorized));
SaleStateManager.Fire(sale, SaleEvent.ChangeGiven, new ChangeTransaction(amount: .45M));
Assert.Equal(expected: 0, actual: sale.Balance);
}
public void AddPayment_adds_the_payment()
{
var sale = new Sale();
var payment = new Payment(amount: 1.00M);
Assert.Equal(expected: 0, actual: sale.PaymentCount);
SaleStateManager.Fire(sale, SaleEvent.AddPayment, payment);
Assert.Equal(expected: 1, actual: sale.PaymentCount);
}
public void Cancel_throws_InvalidOperationException_if_sale_has_undelivered_items()
{
var sale = new Sale();
SaleStateManager.Fire(sale, SaleEvent.AddItem, new SaleItem(1.00M)
{
RequiresDelivery = true
});
Assert.Throws <InvalidOperationException>(() => SaleStateManager.Fire(sale, SaleEvent.Cancel));
}
public void AddPayment_on_Open_sale_sets_state_ChangeDue_if_items_delivered_and_negative_balance()
{
var sale = new Sale();
SaleStateManager.Fire(sale, SaleEvent.AddItem, new SaleItem(price: 1.00M, state: SaleItemState.Delivered));
var payment = new Payment(amount: 3.00M);
SaleStateManager.Fire(sale, SaleEvent.AddPayment, payment);
Assert.Equal(SaleState.ChangeDue, sale.State);
}
public void AddPayment_on_Open_sale_sets_state_WaitingForDelivery_if_items_to_deliver()
{
var sale = new Sale();
SaleStateManager.Fire(sale, SaleEvent.AddItem, new SaleItem(price: 1.00M));
var payment = new Payment(amount: 1.00M);
SaleStateManager.Fire(sale, SaleEvent.AddPayment, payment);
Assert.Equal(SaleState.WaitingForDelivery, sale.State);
}
public void AddItem_adds_the_item()
{
var sale = new Sale();
var saleItem = new SaleItem(price: 1.00M);
Assert.Equal(expected: 0, actual: sale.ItemCount);
SaleStateManager.Fire(sale, SaleEvent.AddItem, saleItem);
Assert.Equal(expected: 1, actual: sale.ItemCount);
}
public void Cancel_cancels_all_items()
{
var sale = new Sale();
var saleItem = new SaleItem(price: 1.00M);
sale.AddItem(saleItem);
Assert.Equal(SaleItemState.NotDelivered, saleItem.State);
SaleStateManager.Fire(sale, SaleEvent.Cancel);
Assert.Equal(SaleItemState.Cancelled, saleItem.State);
}
public void AddItem_on_Authorized_sets_state_to_PartiallyAuthorized()
{
var sale = new Sale();
var saleItem = new SaleItem(price: 4.55M);
SaleStateManager.Fire(sale, SaleEvent.AddItem, saleItem);
SaleStateManager.Fire(sale, SaleEvent.ItemDelivered, saleItem);
SaleStateManager.Fire(sale, SaleEvent.AddPayment, new Payment(amount: 5.55M));
SaleStateManager.Fire(sale, SaleEvent.AddItem, new SaleItem(price: 2.22M));
Assert.Equal(SaleState.PartiallyAuthorized, sale.State);
}
public void ItemDelivered_sets_state_to_Completed_if_fully_balanced_and_delivered()
{
var sale = new Sale();
var saleItem = new SaleItem(price: 4.55M);
SaleStateManager.Fire(sale, SaleEvent.AddItem, saleItem);
SaleStateManager.Fire(sale, SaleEvent.AddPayment, new Payment(amount: 4.55M));
Assert.Equal(SaleState.WaitingForDelivery, sale.State);
SaleStateManager.Fire(sale, SaleEvent.ItemDelivered, saleItem);
Assert.Equal(SaleState.Completed, sale.State);
}
public void AddPayment_on_CancelledSale_throws_InvalidOperationException()
{
Assert.Throws <InvalidOperationException>(() => SaleStateManager.Fire(new Sale(SaleState.Cancelled), SaleEvent.AddPayment, new Payment(amount: 1)));
}