.isEqualTo(new char[] {(char) 1, (char) 0, (char) 0});
  }

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

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

     * Supported types are Kryo and JavaBin serialization.
     * </p>
     *
     * @param obj the object to serialize
     * @return the serialized object as a byte array
     * @throws IllegalArgumentException if an unsupported serializer type is configured
     * @throws IORuntimeException if an I/O error occurs during serialization
     */
    public byte[] fromObjectToBinary(final Object obj) {

    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();

     * @throws NullPointerException if {@code seg} is {@code null}.
     * @throws IllegalArgumentException if {@code seg} leads to non-existent directory.
     */
    public void change(String seg) {
        Path newCwd = resolve(seg);
        if (Files.isDirectory(newCwd)) {
            this.directory = newCwd;
        } else {
            throw new IllegalArgumentException("Directory '" + directory + "' does not exist");
        }
    }

    }

    /**
     * Adds a normalizer to the chain.
     * @param normalizer The normalizer to add.
     * @throws IllegalArgumentException if normalizer is null
     */
    public void add(final Normalizer normalizer) {
        if (normalizer == null) {
            throw new IllegalArgumentException("normalizer must not be null");
        }
        normalizers.add(normalizer);
    }

    @DisplayName("Test invalid configuration")
    void testInvalidConfiguration() {
        assertThrows(IllegalArgumentException.class, () -> new SimpleCircuitBreaker("invalid", 0, 2, 100));
        assertThrows(IllegalArgumentException.class, () -> new SimpleCircuitBreaker("invalid", 3, 0, 100));
        assertThrows(IllegalArgumentException.class, () -> new SimpleCircuitBreaker("invalid", 3, 2, -1));
    }

    @Test

   *
   * @throws IllegalArgumentException if duplicate keys are provided
   */
  public static <K, V> ImmutableMap<K, V> of(K k1, V v1, K k2, V v2) {
    return RegularImmutableMap.fromEntries(entryOf(k1, v1), entryOf(k2, v2));
  }

  /**
   * Returns an immutable map containing the given entries, in order.
   *
   * @throws IllegalArgumentException if duplicate keys are provided
   */

        try {
            return clazz.newInstance();
        } catch (final Exception e) {
            throw new IllegalArgumentException("Cannot create instance of: " + clazz, e);
        } catch (final LinkageError e) {
            throw new IllegalArgumentException("Cannot create instance of: " + clazz, e);
        }
    }

    /**

          ToOptionalState::getOptional,
          Collector.Characteristics.UNORDERED);

  /**
   * A collector that converts a stream of zero or one elements to an {@code Optional}.
   *
   * @throws IllegalArgumentException if the stream consists of two or more elements.
   * @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be

      if (b != (byte) 0xff) {
        return false;
      }
    }
    return true;
  }

  @FormatMethod
  private static IllegalArgumentException formatIllegalArgumentException(
      String format, Object... args) {
    return new IllegalArgumentException(String.format(Locale.ROOT, format, args));
  }