@Test
public void testAllOf() throws InterruptedException, ExecutionException {
Future<List<Integer>> i = CompletableFutures.allOf(futures);
complete(100);
assertEquals(IntStream.range(0, 100).boxed().collect(toList()), i.get());
}
@Test
public void testNullAllOf() throws InterruptedException, ExecutionException {
Future<List<Integer>> i = CompletableFutures.allOf();
assertTrue(i.isDone());
assertTrue(i.get().isEmpty());
}