assertEquals(15, multimap.expectedValuesPerKey);
  }

  public void testCreateFromIllegalSizes() {
    assertThrows(IllegalArgumentException.class, () -> HashMultimap.create(-20, 15));

    assertThrows(IllegalArgumentException.class, () -> HashMultimap.create(20, -15));
  }

  public void testEmptyMultimapsEqual() {
    Multimap<String, Integer> setMultimap = HashMultimap.create();

    assertEquals(15, multimap.expectedValuesPerKey);
  }

  public void testCreateFromIllegalSizes() {
    assertThrows(IllegalArgumentException.class, () -> HashMultimap.create(-20, 15));

    assertThrows(IllegalArgumentException.class, () -> HashMultimap.create(20, -15));
  }

  public void testEmptyMultimapsEqual() {
    Multimap<String, Integer> setMultimap = HashMultimap.create();

    Interners.InternerBuilder builder = Interners.newBuilder();
    assertThrows(IllegalArgumentException.class, () -> builder.concurrencyLevel(0));
  }

  public void testConcurrencyLevel_negative() {
    Interners.InternerBuilder builder = Interners.newBuilder();
    assertThrows(IllegalArgumentException.class, () -> builder.concurrencyLevel(-42));
  }

    protected long lastLoadedTime = 0;

    public void add(final String name, final DataStore dataStore) {
        if (name == null || dataStore == null) {
            throw new IllegalArgumentException("name or dataStore is null.");
        }
        if (logger.isDebugEnabled()) {
            logger.debug("Loaded {}", name);
        }
        dataStoreMap.put(name.toLowerCase(Locale.ROOT), dataStore);

            case 'c':
            case 'd':
            case 'e':
            case 'f':
                value += 10 + ( arr[ ai ] - 'a' );
                break;
            default:
                throw new IllegalArgumentException(new String(arr, offset, length));
            }
            count++;
        }

        return value;
    }

    static final char[] HEXCHARS = {

  public void testMemoizeWithExpiration_longTimeUnitNegative() throws InterruptedException {
    assertThrows(
        IllegalArgumentException.class,
        () -> Suppliers.memoizeWithExpiration(() -> "", 0, MILLISECONDS));

    assertThrows(
        IllegalArgumentException.class,
        () -> Suppliers.memoizeWithExpiration(() -> "", -1, MILLISECONDS));
  }

  @J2ktIncompatible // Duration

  public void testMemoizeWithExpiration_longTimeUnitNegative() throws InterruptedException {
    assertThrows(
        IllegalArgumentException.class,
        () -> Suppliers.memoizeWithExpiration(() -> "", 0, MILLISECONDS));

    assertThrows(
        IllegalArgumentException.class,
        () -> Suppliers.memoizeWithExpiration(() -> "", -1, MILLISECONDS));
  }

  @J2ktIncompatible // Duration

    assertThat(Ints.ensureCapacity(ARRAY1, 2, 1)).isEqualTo(new int[] {(int) 1, (int) 0, (int) 0});
  }

  public void testEnsureCapacity_fail() {
    assertThrows(IllegalArgumentException.class, () -> Ints.ensureCapacity(ARRAY1, -1, 1));
    assertThrows(IllegalArgumentException.class, () -> Ints.ensureCapacity(ARRAY1, 1, -1));
  }

  public void testJoin() {
    assertThat(Ints.join(",", EMPTY)).isEmpty();

      fail(
          "calling setCount() with a negative count should throw "
              + "IllegalArgumentException or UnsupportedOperationException");
    } catch (IllegalArgumentException | UnsupportedOperationException expected) {
    }
  }

  // TODO: test adding element of wrong type

  /**
   * Returns {@link Method} instances for the {@code setCount()} tests that assume multisets support

   * is, the first call to {@link #next()} will return the first element (or throw {@link
   * NoSuchElementException} if {@code size} is zero).
   *
   * @throws IllegalArgumentException if {@code size} is negative
   */
  protected AbstractIndexedListIterator(int size) {
    this(size, 0);
  }

  /**