leaseManager.releaseAll();

        assertNull(leaseManager.getLease(key1));
        assertNull(leaseManager.getLease(key2));
        assertTrue(leaseManager.getAllLeases().isEmpty());
    }

    @Test
    @DisplayName("Should clean up expired leases")
    void testCleanupExpiredLeases() throws InterruptedException {
        String path = "/share/expired.txt";

   *
   * @return {@code true} if the iterable contains no elements
   */
  public static boolean isEmpty(Iterable<?> iterable) {
    if (iterable instanceof Collection) {
      return ((Collection<?>) iterable).isEmpty();
    }
    return !iterable.iterator().hasNext();
  }

  /**

    assertEquals(expected.length, ByteSource.concat(b1, b2, b3).size());
    assertFalse(ByteSource.concat(b1, b2, b3).isEmpty());

    ByteSource emptyConcat = ByteSource.concat(ByteSource.empty(), ByteSource.empty());
    assertTrue(emptyConcat.isEmpty());
    assertEquals(0, emptyConcat.size());
  }

  public void testConcat_infiniteIterable() throws IOException {

      maxElements: Int,
    ) = error("unsupported")
  }

  /** Returns true if no tasks have been scheduled. This runs the coordinator for confirmation. */
  fun isIdle() = taskRunner.activeQueues().isEmpty()

  override fun close() {
    tasksExecutor.shutdownNow()
  }

  companion object {
    var instance = 0
  }

  }

  public void testEmptyRangeSubMultiset(SortedMultiset<E> multiset) {
    assertTrue(multiset.isEmpty());
    assertEquals(0, multiset.size());
    assertEquals(0, multiset.toArray().length);
    assertTrue(multiset.entrySet().isEmpty());
    assertFalse(multiset.iterator().hasNext());
    assertEquals(0, multiset.entrySet().size());

   * {@link ForwardingMultiset#clear}, {@link ForwardingMultiset#contains}, {@link
   * ForwardingMultiset#containsAll}, {@link ForwardingMultiset#count}, {@link
   * ForwardingMultiset#isEmpty}, the {@link Set#size} and {@link Set#iterator} methods of {@link
   * ForwardingMultiset#entrySet}, and {@link ForwardingMultiset#remove(Object, int)}. In many

        result.get(10, SECONDS);
      }
      // TODO(cpovirk): Verify that the cancelled futures are exactly ones that we expect.
    }

    assertThat(logHandler.getStoredLogRecords()).isEmpty();
  }

  public void testAvoidsStackOverflow_manySubmitted() throws Exception {
    SettableFuture<@Nullable Void> settableFuture = SettableFuture.create();

  }

  public void testAsMapEmpty() {
    Set<String> strings = ImmutableSet.of();
    Map<String, Integer> map = Maps.asMap(strings, LENGTH_FUNCTION);
    assertThat(map.entrySet()).isEmpty();
    assertTrue(map.isEmpty());
    assertThat(map.get("five")).isNull();
  }

  private static class NonNavigableSortedSet extends ForwardingSortedSet<String> {
    private final SortedSet<String> delegate = Sets.newTreeSet();

        }
        return Optional.empty();
    }

    @Override
    public Optional<List<String>> goals() {
        if (!commandLine.getArgList().isEmpty()) {
            return Optional.of(commandLine.getArgList());
        }
        return Optional.empty();
    }

    @Override
    protected CommonsCliMavenOptions copy(

            String msg = "Cannot register null or empty query: name=" + name + " value=" + value;
            throw new InvalidQueryRegisteredException(msg);
        }
    }

    protected void checkEsInvalidQueryCollection(String name, Collection<?> values) {
        if (values == null || values.isEmpty()) {