// When
        MessageDigest md4 = Crypto.getMD4();
        byte[] hash = md4.digest(data);

        // Then
        assertNotNull(hash);
        assertEquals(16, hash.length); // MD4 produces 128-bit hash
    }

    @Test
    @DisplayName("Should calculate MD5 hash correctly")
    void testMD5Hash() {
        // Given
        String input = "Hello World";
        byte[] data = input.getBytes();

            assertNull(nc.dc);
        }
    }

    @Nested
    @DisplayName("toString() Tests")
    class ToStringTests {

        @Test
        @DisplayName("toString with valid data produces expected format")
        void testToStringWithValidData() {
            byte[] challenge = new byte[] { (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0xFF };
            UniAddress dc = mock(UniAddress.class);

                different = true;
                break;
            }
        }
        assertEquals(true, different, "Different keys should produce different HMAC values");
    }

    @Test
    void testDifferentDataProducesDifferentResults() {
        // Test that different data produces different results
        byte[] data1 = "data1".getBytes();
        byte[] data2 = "data2".getBytes();

        assertTrue(result.contains("nextEntry="));
        assertTrue(result.contains("action="));
        assertTrue(result.contains("file=" + fileName));
        // Hexdump.toHexString produces 4-character padded uppercase hex
        String expectedHex = String.format("%04X", action);
        assertTrue(result.contains("0x" + expectedHex));
    }

    @Test

   * the order of entries.
   *
   * @param keyFunction the function used to produce the key for each value
   * @throws NullPointerException if any element of this iterable is {@code null}, or if {@code
   *     keyFunction} produces {@code null} for any key
   * @since 14.0
   */
  @SuppressWarnings("nullness") // Unsafe, but we can't do much about it now.

   * the order of entries.
   *
   * @param keyFunction the function used to produce the key for each value
   * @throws NullPointerException if any element of this iterable is {@code null}, or if {@code
   *     keyFunction} produces {@code null} for any key
   * @since 14.0
   */
  @SuppressWarnings("nullness") // Unsafe, but we can't do much about it now.

   *
   * @param minimumBits a positive integer. This can be arbitrarily large. The returned {@link
   *     HashFunction} instance may use memory proportional to this integer.
   * @return a hash function, described above, that produces hash codes of length {@code
   *     minimumBits} or greater
   */
  public static HashFunction goodFastHash(int minimumBits) {
    int bits = checkPositiveAndMakeMultipleOf32(minimumBits);

    if (bits == 32) {

         *
         * @param <R> The type of the result returned by the function.
         * @param stream A function that processes the stream and produces a result.
         * @return The result produced by applying the function to the stream.
         */
        public <R> R get(final Function<Stream<T>, R> stream) {
            try (Stream<T> s = supplier.get()) {

FIELD com.google.common.util.concurrent.AbstractFuture.Listener.executor com.google.common.util.concurrent.ExecutionSequencer.TaskNonReentrantExecutor

# ***** FALSE POSITIVES *****

# The Runnable type is so generic that it produces too many false positives.
TYPE java.lang.Runnable

FIELD com.google.common.base.Converter.reverse

        ace.sid = new SID("S-1-5-21-1234567890-123456789-123456789-1000");

        String result = ace.toString();

        assertTrue(result.startsWith("Allow "));
        // Hexdump.toHexString produces uppercase hex
        assertTrue(result.toLowerCase().contains("0x001200a9"));
        // ACE.toString() outputs "Direct    " with 4 spaces
        assertTrue(result.contains("Direct"));