@Before
public void setup() {
promotionElement = new PromotionElement();
promotionElement.setDiscountElements(Lists.newArrayList(firstTwo, nextOne));
promotionElement.setMatcher(productMatcher);
promotionElement.setTotalRequired(3);
}
@Test
public void testCriteriaMet_itemsInList() {
// setup
Transaction transaction =
TransactionTestUtils.createTransaction(
toothBrush, milkCarton, toothBrush, chips, toothBrush, toothBrush);
Set<Integer> alreadyClaimedProducts = Sets.newHashSet(1, 3);
// test
boolean result = promotionElement.criteriaMet(transaction, alreadyClaimedProducts);
// verify
assertThat(result, is(false));
assertThat(alreadyClaimedProducts, IsIterableContainingInAnyOrder.containsInAnyOrder(1, 3));
}
private void testCriteriaMet(
String reason, Transaction transaction, boolean expected, Integer... ids) {
// setup
Set<Integer> alreadyClaimedProducts = Sets.newHashSet();
// test
boolean result = promotionElement.criteriaMet(transaction, alreadyClaimedProducts);
// verify
checkThat(reason, result, equalTo(expected));
if (expected) {
checkThat(
reason, alreadyClaimedProducts, IsIterableContainingInAnyOrder.containsInAnyOrder(ids));
} else {
checkThat(reason, alreadyClaimedProducts, IsCollectionWithSize.hasSize(0));
}
}
@Test
public void testApplyPromotion_noDiscountsApplied() {
// setup
Transaction transaction =
TransactionTestUtils.createTransaction(
toothBrush, milkCarton, toothBrush, chips, toothBrush, toothBrush, toothBrush);
// test
promotionElement.applyPromotion(transaction);
// verify
List<TransactionItem> brushes = Lists.newArrayList(transaction.getItemMap().get(toothBrush));
assertDiscountApplied("brush 1", brushes.get(0), true, noDiscount);
assertDiscountApplied("brush 2", brushes.get(1), true, noDiscount);
assertDiscountApplied("brush 3", brushes.get(2), true, freeDiscount);
assertDiscountApplied("brush 4", brushes.get(3), false, null);
assertDiscountApplied("brush 5", brushes.get(4), false, null);
}