assertFalse(UniAddress.isDotQuadIP(input));
        }

        @Test
        void shouldReturnTrueForInvalidOctetValues() {
            // isDotQuadIP does not validate octet values, only checks format
            assertTrue(UniAddress.isDotQuadIP("192.168.1.256"));
            assertTrue(UniAddress.isDotQuadIP("999.999.999.999"));
        }

        @Test
        void shouldThrowExceptionForNullInput() {

    @DisplayName("null and empty names are handled explicitly")
    @NullAndEmptySource
    @ValueSource(strings = { " \t\n" })
    void handlesNullAndEmptyNames(String name) throws Exception {
        // Filter accepts only when name is exactly null, otherwise false
        SmbFilenameFilter filter = (dir, n) -> n == null;

        boolean result = filter.accept(mockDir, name);

        if (name == null) {

        assertFalse(it.hasNext(), "No more elements expected");
        assertNull(it.next(), "next() returns null when exhausted in this implementation");
    }

    @Test
    @DisplayName("With filter: only accepted entries are returned and filter is invoked per entry")
    void withFilter_acceptsSome_skipsOthers_andVerifiesInteractions() throws Exception {
        SmbFile parent = newParent();

        // Assertions
        // When CAP_EXTENDED_SECURITY is set, it only copies GUID but doesn't update bufferIndex
        assertEquals(0, bytesRead);
        assertArrayEquals(guid, serverData.guid);
        assertEquals("", serverData.oemDomainName);
    }

    @Test
    void testReadBytesWireFormat_NoDomainName() {
        // Scenario where byteCount is only the encryption key length
        serverData.capabilities = 0;

        // Skip uses read internally, which may throw IOException when it tries to read the next header
        try {
            long skipped = sis.skip(10);
            // If it doesn't throw, it should only skip what's available
            assertEquals(3, skipped);
        } catch (IOException e) {
            // This is also acceptable behavior - skip may fail when it runs out of data

    /** queryId */
    protected String queryId;

    /** url */
    protected String url;

    /** userInfoId */
    protected String userInfoId;

    // [Referrers] *comment only

    // ===================================================================================
    //                                                                             DB Meta

import org.codelibs.core.exception.ParseRuntimeException;
import org.codelibs.core.misc.LocaleUtil;

/**
 * Utility for converting objects that represent only dates to {@link Date}, {@link Calendar}, or {@link java.sql.Date}.
 * <p>
 * For objects that represent only time, see {@link TimeConversionUtil}. For objects that represent both date and time, see {@link TimestampConversionUtil}.
 * </p>
 * <p>

    //                                                                           =========
    /** gidNumber */
    protected Long gidNumber;

    /** name */
    protected String name;

    // [Referrers] *comment only

    // ===================================================================================
    //                                                                             DB Meta

 */

package jcifs.internal.dtyp;

import java.io.IOException;

import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;
import jcifs.smb.SID;

/**
 * Internal use only
 *
 *
 * <p>This class is intended for internal use.</p>
 */
public class SecurityDescriptor implements SecurityInfo {

    /**
     * Descriptor type
     */
    private int type;

    /**

        final ExtractData result = textExtractor.getText(in, null);

        assertNotNull(result);
        assertNotNull(result.getContent());
    }

    /**
     * Test extraction with whitespace-only content.
     */
    public void test_getText_whitespaceOnly_extractsAsIs() {
        final String whitespaceContent = "   \t\n\r   ";
        final InputStream in = new ByteArrayInputStream(whitespaceContent.getBytes());