@BeforeClass
public static void setUpBeforeClass() {
itemSupplier = CertainItemSupplier.getInstance();
supplierItemIds = new HashSet<Integer>();
supplierItemIds.add(101);
supplierItemIds.add(102);
supplierItemIds.add(103);
itemSupplier.initializeItems(supplierItemIds);
}
@Test
public void orderingBadItemsThrowsException() {
/*
* Check that items with ID not supported by the supplier get rejected
*/
ItemQuantity wrongItem = new ItemQuantity(201, 5);
List<ItemQuantity> wrongItemQuantities = new ArrayList<ItemQuantity>();
wrongItemQuantities.add(wrongItem);
OrderStep wrongStep = new OrderStep(1, wrongItemQuantities);
boolean exceptionWasThrown = false;
try {
itemSupplier.executeStep(wrongStep);
} catch (OrderProcessingException ex) {
exceptionWasThrown = true;
}
assertTrue(exceptionWasThrown);
/*
* Check that items with negative quantity get rejected
*/
wrongItem = new ItemQuantity(101, -5);
wrongItemQuantities = new ArrayList<ItemQuantity>();
wrongItemQuantities.add(wrongItem);
wrongStep = new OrderStep(1, wrongItemQuantities);
exceptionWasThrown = false;
try {
itemSupplier.executeStep(wrongStep);
} catch (OrderProcessingException ex) {
exceptionWasThrown = true;
}
assertTrue(exceptionWasThrown);
}
@Test
public void orderingItemsIncreasesCumulativeOrders() {
/*
* Place first order
*/
ItemQuantity itemQ1 = new ItemQuantity(101, 5);
ItemQuantity itemQ2 = new ItemQuantity(102, 10);
List<ItemQuantity> itemQuantities = new ArrayList<ItemQuantity>();
itemQuantities.add(itemQ1);
itemQuantities.add(itemQ2);
OrderStep step = new OrderStep(1, itemQuantities);
try {
itemSupplier.executeStep(step);
} catch (OrderProcessingException e) {
e.printStackTrace();
fail();
}
List<ItemQuantity> ordersPerItem = null;
try {
ordersPerItem = itemSupplier.getOrdersPerItem(supplierItemIds);
} catch (InvalidItemException e) {
e.printStackTrace();
fail();
}
for (ItemQuantity itemQ : ordersPerItem) {
if (itemQ.getItemId() == 101) assertEquals(5, itemQ.getQuantity());
if (itemQ.getItemId() == 102) assertEquals(10, itemQ.getQuantity());
if (itemQ.getItemId() == 103) assertEquals(0, itemQ.getQuantity());
}
/*
* Place another order
*/
itemQ1 = new ItemQuantity(101, 10);
itemQ2 = new ItemQuantity(103, 3);
itemQuantities = new ArrayList<ItemQuantity>();
itemQuantities.add(itemQ1);
itemQuantities.add(itemQ2);
step = new OrderStep(1, itemQuantities);
try {
itemSupplier.executeStep(step);
} catch (OrderProcessingException e) {
e.printStackTrace();
fail();
}
ordersPerItem = null;
try {
ordersPerItem = itemSupplier.getOrdersPerItem(supplierItemIds);
} catch (InvalidItemException e) {
e.printStackTrace();
fail();
}
for (ItemQuantity itemQ : ordersPerItem) {
if (itemQ.getItemId() == 101) assertEquals(15, itemQ.getQuantity());
if (itemQ.getItemId() == 102) assertEquals(10, itemQ.getQuantity());
if (itemQ.getItemId() == 103) assertEquals(3, itemQ.getQuantity());
}
}