@Test
public void shouldMergeTwoPriorityQueues() {
final PriorityQueue<Integer> source = of(3, 1, 4, 1, 5);
final PriorityQueue<Integer> target = of(9, 2, 6, 5, 3);
assertThat(source.merge(target)).isEqualTo(of(3, 1, 4, 1, 5, 9, 2, 6, 5, 3));
assertThat(PriorityQueue.of(3).merge(PriorityQueue.of(toStringComparator(), 1)))
.isEqualTo(of(3, 1));
}
@Test
public void shouldComputeDistinctOfNonEmptyTraversableUsingKeyExtractor() {
final Comparator<String> comparator = (o1, o2) -> Integer.compare(o1.charAt(1), o2.charAt(1));
assertThat(
PriorityQueue.of(comparator, "5c", "1a", "3a", "1a", "2a", "4b", "3b")
.distinct()
.map(s -> s.substring(1)))
.isEqualTo(of("a", "b", "c"));
}
@Test
public void shouldKeepInstanceOfPriorityQueue() {
final PriorityQueue<Integer> queue = PriorityQueue.of(1, 3, 2);
assertThat(queue.toPriorityQueue()).isSameAs(queue);
}
