f.set("foo");
    assertEquals(1, ex.runCount);
  }

  // Error cases
  public void testSameThreadExecutionException() {
    SettableFuture<String> f = SettableFuture.create();
    Exception e = new IllegalArgumentException("foo not found");
    MockCallback callback = new MockCallback(e);
    addCallback(f, callback, directExecutor());
    f.setException(e);
  }

  public void testCancel() {

     * silently {@link #addNode(Object) add} each missing endpoint to the graph.
     *
     * @return this {@code Builder} object
     * @throws IllegalArgumentException if the introduction of the edge would violate {@link
     *     #allowsSelfLoops()}
     * @throws IllegalArgumentException if the endpoints are unordered and the graph is directed
     */
    @CanIgnoreReturnValue

            throw new IllegalArgumentException("Found duplicate term [" + values[0] + "] in user dictionary.");
        }
        return rule;
    }

    public static UserDictionary getUserDictionary(Environment env, Settings settings) {
        if (settings.get(USER_DICT_PATH_OPTION) != null && settings.get(USER_DICT_RULES_OPTION) != null) {
            throw new IllegalArgumentException(

        // Given
        Throwable cause = new IllegalArgumentException("Invalid argument");

        // When
        RuntimeCIFSException exception = new RuntimeCIFSException(cause);

        // Then
        assertNotNull(exception);
        assertEquals(cause, exception.getCause());
        assertTrue(exception.getMessage().contains("IllegalArgumentException"));

    public void test_execute_withIllegalArgumentException() {
        // Create mock SearchEngineClient that throws IllegalArgumentException
        searchEngineClient = new SearchEngineClient() {
            @Override
            public long deleteByQuery(String index, QueryBuilder query) {
                throw new IllegalArgumentException("Invalid argument provided");
            }
        };

    /**
     * Creates an artifact.
     *
     * @param request the request holding artifact creation parameters
     * @return an {@code Artifact}, never {@code null}
     * @throws IllegalArgumentException if {@code request} is null or {@code request.session} is null or invalid
     */
    @Nonnull
    Artifact create(@Nonnull ArtifactFactoryRequest request);

    @Nonnull
    default Artifact create(

     *             if encryption fails
     */
    public byte[] encryptMessage(final byte[] message, final long sessionId) throws CIFSException {
        if (message == null) {
            throw new IllegalArgumentException("Message cannot be null");
        }

        // Validate encryption parameters
        if (!validateEncryptionParameters()) {
            throw new CIFSException("Invalid encryption parameters");
        }

   * avoids the need for expensive resizing operations later, but setting this value unnecessarily
   * high wastes memory.
   *
   * @return this {@code CacheBuilder} instance (for chaining)
   * @throws IllegalArgumentException if {@code initialCapacity} is negative
   * @throws IllegalStateException if an initial capacity was already set
   */
  @CanIgnoreReturnValue
  public CacheBuilder<K, V> initialCapacity(int initialCapacity) {

    }
  }

  public void testPriority_tooLow() {
    assertThrows(
        IllegalArgumentException.class, () -> builder.setPriority(Thread.MIN_PRIORITY - 1));
  }

  public void testPriority_tooHigh() {
    assertThrows(
        IllegalArgumentException.class, () -> builder.setPriority(Thread.MAX_PRIORITY + 1));
  }

  public void testUncaughtExceptionHandler_custom() {

        pkcs8Base64Text.decodeBase64()
          ?: throw IllegalArgumentException("failed to decode private key")

      // The private key doesn't tell us its type but it's okay because the certificate knows!
      val keyType =
        when (certificate.publicKey) {
          is ECPublicKey -> "EC"
          is RSAPublicKey -> "RSA"
          else -> throw IllegalArgumentException("unexpected key type: ${certificate.publicKey}")
        }