Collection<String> values = unmod.values();
    assertThrows(UnsupportedOperationException.class, () -> values.add("4"));
    assertThrows(UnsupportedOperationException.class, () -> values.remove("four"));
    assertThrows(UnsupportedOperationException.class, () -> values.removeAll(singleton("four")));
    assertThrows(UnsupportedOperationException.class, () -> values.retainAll(singleton("four")));
    assertThrows(

        }

        @Test
        @DisplayName("Should handle all zero values correctly")
        void testReadBytesWireFormatWithZeroValues() throws SMBProtocolDecodingException {
            // Given
            byte[] buffer = new byte[60];
            SMBUtil.writeInt2(60, buffer, 0); // Structure size
            // All other values remain zero

            // When

     * @param name The name of the field.
     * @param values The list of values for the field.
     * @return The result data body.
     */
    protected String getResultDataBody(final String name, final List<String> values) {
        final StringBuilder buf = new StringBuilder();
        buf.append("<list>");
        if (values != null && !values.isEmpty()) {

   * inequality.
   */
  protected final <T> void setDefault(Class<T> type, T value) {
    tester.setDefault(type, value);
  }

  /**
   * Sets two distinct values for {@code type}. These values can be used for both null pointer
   * testing and equals testing.
   *
   * @since 17.0
   */
  protected final <T> void setDistinctValues(Class<T> type, T value1, T value2) {

        }
    }

    @Test
    void testNegativeValueHandling() {
        byte[] buffer = new byte[8];

        // Test negative values in writeInt4
        SMBUtil.writeInt4(-1L, buffer, 0);
        assertEquals(-1, SMBUtil.readInt4(buffer, 0));

        // Test negative values in writeInt8
        SMBUtil.writeInt8(-1L, buffer, 0);
        assertEquals(-1L, SMBUtil.readInt8(buffer, 0));
    }

    private static final int TEST_FID = 0x1234;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
    }

    @Test
    @DisplayName("Constructor should initialize with correct values")
    void testConstructor() {
        // Act
        transPeekNamedPipe = new TransPeekNamedPipe(mockConfig, TEST_PIPE_NAME, TEST_FID);

        // Assert
        assertNotNull(transPeekNamedPipe);

                @SuppressWarnings("unchecked")
                // map generators must past entry objects
                List<E> normalValues = (List<E>) asList(entries);

                // prepare extreme values to be filtered out of view
                sort(extremeValues, comparator);
                E firstExclusive = extremeValues.get(1);
                E lastExclusive = extremeValues.get(2);

    assertEquals("[" + JOINER.join(map.entrySet()) + "]", map.entrySet().toString());
    assertEquals("[" + JOINER.join(map.keySet()) + "]", map.keySet().toString());
    assertEquals("[" + JOINER.join(map.values()) + "]", map.values().toString());

    assertEquals(new HashSet<>(map.entrySet()), map.entrySet());
    assertEquals(new HashSet<>(map.keySet()), map.keySet());
  }

 * create a lightweight concrete subclass only to exercise the inherited
 * behaviour. The tests cover flag manipulation, byte‑buffer operations and
 * static helpers. Edge cases such as null or short arrays and negative
 * values are verified to ensure proper exception handling and byte
 * conversion.
 */
@ExtendWith(MockitoExtension.class)
class NtlmMessageTest {

    /** Lightweight concrete implementation used only for testing. */

    for (Charset charset : Charset.availableCharsets().values()) {
      PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
      Funnels.stringFunnel(charset).funnel("test", primitiveSink);
      verify(primitiveSink).putString("test", charset);
    }
  }

  public void testForStringsCharset_null() {
    for (Charset charset : Charset.availableCharsets().values()) {
      assertNullsThrowException(Funnels.stringFunnel(charset));