@Test
public void toSortedBagBy_empty() {
ImmutableBag<Integer> immutableBag = Bags.immutable.of();
Function<Integer, Integer> function = object -> object * -1;
MutableSortedBag<Integer> sortedBag = immutableBag.toSortedBagBy(function);
sortedBag.addOccurrences(1, 3);
sortedBag.addOccurrences(10, 2);
Verify.assertSortedBagsEqual(
TreeBag.newBagWith(Comparators.byFunction(function), 10, 10, 1, 1, 1), sortedBag);
}
@Test
public void toSortedBag_empty() {
ImmutableBag<String> immutableBag = Bags.immutable.of();
MutableSortedBag<String> sortedBag =
immutableBag.toSortedBag(Comparators.reverseNaturalOrder());
sortedBag.addOccurrences("apple", 3);
sortedBag.addOccurrences("orange", 2);
Verify.assertSortedBagsEqual(
TreeBag.newBagWith(
Comparators.reverseNaturalOrder(), "orange", "orange", "apple", "apple", "apple"),
sortedBag);
}
@SafeVarargs
@Override
protected final <T> MutableSortedBag<T> newWithOccurrences(
ObjectIntPair<T>... elementsWithOccurrences) {
MutableSortedBag<T> bag = TreeBag.newBag();
for (int i = 0; i < elementsWithOccurrences.length; i++) {
ObjectIntPair<T> itemToAdd = elementsWithOccurrences[i];
bag.addOccurrences(itemToAdd.getOne(), itemToAdd.getTwo());
}
return bag.asUnmodifiable();
}