String ts = ex.toString();
        assertTrue(ts.contains("SmbUnsupportedOperationException"), "toString should contain class name");
        if (msg != null) {
            assertTrue(ts.contains(msg), "toString should contain provided message");
        } else {
            assertFalse(ts.contains(":"), "toString should not contain ':' when message is null");
        }
    }

    @Test

        if (badWord.contains(" ") || badWord.contains("  ")) {
            return "badWord contains space.";
        }
        return null;
    }

    /**
     * Update default bad words.
     */
    protected static void updateDefaultBadwords() {
        if (defaultWords != null) {
            return;
        }

        final List<String> list = new ArrayList<>();

            if (root_directory != null) {
                _dst = _dst.deferred;
                root_directory.encode(_dst);

            }
            if (object_name != null) {
                _dst = _dst.deferred;
                object_name.encode(_dst);

            }
            if (security_quality_of_service != null) {
                _dst = _dst.deferred;

        assertNotNull(exception);
        assertNull(exception.getCause());
        assertNull(exception.getMessage());
    }

    public void test_constructor_withNullMessageAndCause() {
        // Test with both null message and cause
        DataStoreException exception = new DataStoreException(null, null);

        assertNotNull(exception);
        assertNull(exception.getMessage());
        assertNull(exception.getCause());

    }

    @Test
    @DisplayName("readParameterWordsWireFormat with null buffer - throws NullPointerException")
    void testReadParameterWordsWithNullBuffer() {
        assertThrows(NullPointerException.class, () -> response.readParameterWordsWireFormat(null, 0));
    }

    @Test
    @DisplayName("readParameterWordsWireFormat with offset beyond buffer - throws exception")

    }

    @Override
    public @Nullable Integer next(Integer value) {
      int i = value;
      return (i == Integer.MAX_VALUE) ? null : i + 1;
    }

    @Override
    public @Nullable Integer previous(Integer value) {
      int i = value;
      return (i == Integer.MIN_VALUE) ? null : i - 1;
    }

    @Override
    Integer offset(Integer origin, long distance) {
      checkNonnegative(distance, "distance");

    void testNullDecryptionKey() {
        // When/Then
        assertThrows(NullPointerException.class, () -> {
            new Smb2EncryptionContext(1, DialectVersion.SMB311, testEncryptionKey, null);
        }, "Should throw NullPointerException for null decryption key");
    }

    @Test
    @DisplayName("Should accept null dialect during construction")
    void testNullDialect() {
        // When/Then

    @Nested
    @DisplayName("Invalid input – null file handling")
    class InvalidPath {
        @Test
        void acceptWithNullThrows() {
            SmbFileFilter throwOnNull = new SmbFileFilter() {
                @Override
                public boolean accept(SmbFile file) throws SmbException {
                    if (file == null) {
                        throw new SmbException("null file");
                    }

        StopwordsFile.StopwordsUpdater updater = stopwordsFile.new StopwordsUpdater(null);

        StopwordsItem result = updater.commit();
        assertNull(result);

        updater.close();
    }

    public void test_updater_writeLine() {
        StopwordsFile.StopwordsUpdater updater = stopwordsFile.new StopwordsUpdater(null);

        // Test writing a comment line

    }

    @Test
    void equals_withBothNullScope_shouldReturnTrue() {
        Name name1 = new Name(mockConfig, "TEST", 0x20, null);
        name1.scope = null;
        Name name2 = new Name(mockConfig, "TEST", 0x20, null);
        name2.scope = null;

        assertTrue(name1.equals(name2));
    }

    @Test
    void equals_withNonNameObject_shouldReturnFalse() {