byte[] actualWritten = new byte[6];
        System.arraycopy(buffer, 0, actualWritten, 0, 6);
        assertArrayEquals(expected, actualWritten, "wire format should match expectation");
    }

    static Stream<Arguments> validParams() {
        // fid 0x1234, lastWriteTime 0 -> UTime all 0xFF

        findNtStatus(dosErr).ifPresent(mock::consume);
        verify(mock).consume(expectedNt);
    }

    @Test
    @DisplayName("DOS_ERROR_MESSAGES length matches expectations")
    void testMessageArrayLength() {
        assertNotNull(DosError.DOS_ERROR_MESSAGES, "DOS_ERROR_MESSAGES should be non‑null");

 * validating constants.
 */
public class SmbConstantsTest {

    /**
     * Verify that the hard‑coded default values are present.
     */
    @Test
    @DisplayName("Default constant values match expectations")
    void defaultValues() {
        assertEquals(445, SmbConstants.DEFAULT_PORT);
        assertEquals(10, SmbConstants.DEFAULT_MAX_MPX_COUNT);
        assertEquals(30000, SmbConstants.DEFAULT_RESPONSE_TIMEOUT);

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

    @Test
    public void testConstructorInitializesFields() {
        // Test constructor initialization with proper expectations
        String pipeName = "\\\\pipe\\testPipe";
        TransWaitNamedPipe pipe = new TransWaitNamedPipe(pipeName);

        // Verify the name is set correctly
        assertEquals(pipeName, pipe.name);

public class SmbResourceLocatorTest {

    /**
     * A very small concrete implementation used only by the tests. It parses
     * the URL string and performs minimal validation – just enough to make the
     * happy-path expectations deterministic.
     */
    private static class DummySmbResourceLocator implements SmbResourceLocator {
        private final String urlStr;
        private final String host;
        private final String path;