@Test
public void should_not_be_available() throws Exception {
assertThat(DiscountOptimization.get().available(Arrays.asList())).isFalse();
assertThat(DiscountOptimization.get().available(Arrays.asList(Discount.NO_DISCOUNT))).isFalse();
assertThat(
DiscountOptimization.get()
.available(Arrays.asList(Discount.FIVE_DISCOUNT, Discount.FIVE_DISCOUNT)))
.isFalse();
assertThat(
DiscountOptimization.get()
.available(Arrays.asList(Discount.TEN_DISCOUNT, Discount.TEN_DISCOUNT)))
.isFalse();
}
@Test
public void should_apply_optimization() throws Exception {
List<Discount> optimizedDiscounts =
DiscountOptimization.get()
.apply(Arrays.asList(Discount.TWENTY_FIVE_DISCOUNT, Discount.TEN_DISCOUNT));
assertThat(optimizedDiscounts)
.containsExactly(Discount.TWENTY_DISCOUNT, Discount.TWENTY_DISCOUNT);
}
