pacMacMock.when(() -> PacMac.calculateMac(anyInt(), any(), any())).thenReturn(mockChecksum);

            // Create a minimal valid PAC structure
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            writeLittleEndianInt(baos, 3); // bufferCount = 3 (minimum required)
            writeLittleEndianInt(baos, PacConstants.PAC_VERSION); // version

            // Buffer 1: LOGON_INFO

import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;

import jcifs.pac.PACDecodingException;

class KerberosApRequestTest {

    // Helper: build a minimal, valid-looking ASN.1 AP-REQ sequence with tags 0/1/2
    private ASN1Sequence buildMinimalApReqSeq(byte apOptions) {
        ASN1EncodableVector v = new ASN1EncodableVector();
        // pvno [0] INTEGER 5

        testBuffer[5] = 0x00; // Access mask byte 1
        testBuffer[6] = 0x12; // Access mask byte 2
        testBuffer[7] = 0x00; // Access mask byte 3

        // Add minimal SID data (S-1-1-0 - Everyone)
        testBuffer[8] = 0x01; // Revision
        testBuffer[9] = 0x01; // Sub-authority count
        testBuffer[10] = 0x00; // Identifier authority
        testBuffer[11] = 0x00;

        assertEquals("Invalid PAC credential type", exception.getMessage());
    }

    /**
     * Tests the constructor with a byte array that is larger than the minimal buffer size.
     */
    @Test
    void testConstructorWithDataMuchLarger() {
        // A byte array with a length greater than 32 should also be considered too large.
        byte[] veryLargeData = new byte[100];

import java.io.IOException;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

/**
 * Tests for SpnegoToken.
 * Uses a minimal concrete subclass to exercise abstract methods.
 */
class SpnegoTokenTest {

    /**
     * Minimal concrete implementation for testing.
     * - parse: sets mechanismToken, throws on null
     * - toByteArray: returns mechanismToken or empty array if null
     */

            assertThrows(ArrayIndexOutOfBoundsException.class, () -> {
                response.readDataWireFormat(buffer, 0, 0);
            });
        }

        @Test
        @DisplayName("Should handle minimal DFS referral buffer")
        void testReadDataWireFormatMinimalBuffer() {
            byte[] buffer = createMinimalDfsReferralBuffer();

            int bytesRead = response.readDataWireFormat(buffer, 0, buffer.length);

import jcifs.Configuration;
import jcifs.NetbiosAddress;
import jcifs.NetbiosName;
import jcifs.ResolverType;

/**
 * Test class for NameServiceClientImpl focusing on public API methods.
 * Optimized for fast execution with minimal network calls.
 */
@ExtendWith(MockitoExtension.class)
@MockitoSettings(strictness = Strictness.LENIENT)
@DisplayName("NameServiceClientImpl Tests")
class NameServiceClientImplTest {

    @Mock

            Mockito.when(mock.getServerSignature()).thenReturn(mockServerSig);
            Mockito.when(mock.getKdcSignature()).thenReturn(mockKdcSig);
        })) {

            // Create minimal PAC data
            byte[] pacData = createMinimalPacData();

            // Test constructor
            KerberosPacAuthData authData = new KerberosPacAuthData(pacData, keys);
            assertNotNull(authData.getPac());

        assertTrue(keywords.size() > 0);
    }

    @Test
    public void testCreateBulkLineWithMinimalItem() {
        // Test with minimal SuggestItem
        SuggestItem item = new SuggestItem(new String[] { "minimal" }, new String[0][0], new String[0], 0, // queryFreq
                0, // docFreq
                1.0f, // userBoost

 * Mockito to guarantee that implementation classes do not inadvertently
 * bypass the filter logic.
 */
public class SmbFileFilterTest {

    /**
     * A minimal implementation that accepts every {@link SmbFile}.
     */
    private final SmbFileFilter ALWAYSACTIVE = new SmbFileFilter() {
        @Override
        public boolean accept(SmbFile file) throws SmbException {