import static org.mockito.Mockito.verify;

import java.util.HashSet;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Stream;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;

     */
    @Test
    @DisplayName("Root cause propagation")
    void testRootCausePropagation() {
        Throwable root = mock(Throwable.class);
        SmbException ex = new SmbException(0, root);
        assertSame(root, ex.getRootCause());
    }

    /**
     * Verify that the string-ctor sets status to {@code NT_STATUS_UNSUCCESSFUL}.
     */
    @Test

    }

    @Test
    @DisplayName("Test FileBasicInfo size method")
    void testFileBasicInfoSize() {
        // Given
        FileBasicInfo info = new FileBasicInfo();

        // When & Then
        assertEquals(40, info.size());
    }

    @Test
    @DisplayName("Test FileBasicInfo toString method")
    void testFileBasicInfoToString() {

import java.net.URLStreamHandlerFactory;
import java.util.ArrayList;
import java.util.List;

import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;

        return new URL(null, spec, new Handler());
    }

    @Test
    @DisplayName("getConfig returns context config")
    void getConfig_returnsConfig() {
        SmbTreeConnection c = newConn();
        assertSame(config, c.getConfig());
    }

    @Test
    @DisplayName("acquire calls tree.acquire on first usage, release calls tree.release at zero")
    void acquire_release_lifecycle() {

    @DisplayName("Test sflags field with various byte values")
    public void testSflagsField(byte value) {
        // When
        serverData.sflags = value;

        // Then
        assertEquals(value, serverData.sflags);
    }

    /**
     * Test setting and getting int fields
     */
    @Test
    @DisplayName("Test int fields with various values")

    @ParameterizedTest
    @EmptySource
    @DisplayName("valueOf(\"\") throws IllegalArgumentException for empty input")
    void valueOfRejectsEmpty(String empty) {
        assertThrows(IllegalArgumentException.class, () -> RequestParam.valueOf(empty));
    }

    // Invalid: null is not allowed for valueOf
    @ParameterizedTest
    @NullSource
    @DisplayName("valueOf(null) throws NullPointerException")

            return buffer;
        }
    }

    @Nested
    @DisplayName("Response Tests")
    class ResponseTests {

        @Test
        @DisplayName("Should return null response by default")
        void testGetResponse() {
            assertNull(testMessage.getResponse());
        }

        @Test
        @DisplayName("Should accept response setting")
        void testSetResponse() {

        return new Handler(ctx);
    }

    @Test
    @DisplayName("getDefaultPort returns SMB default port")
    void testGetDefaultPort() {
        // Arrange
        Handler handler = newHandler();
        // Act & Assert
        assertEquals(SmbConstants.DEFAULT_PORT, handler.getDefaultPort(), "Default port should match SmbConstants");
    }

    @Test
    @DisplayName("openConnection returns SmbFile using provided CIFSContext")

        @Test
        @DisplayName("Should initialize with self-referencing next")
        void testConstructorInitialization() {
            DfsReferralDataImpl data = new DfsReferralDataImpl();
            assertNotNull(data.next());
            assertSame(data, data.next());
        }
    }

    @Nested
    @DisplayName("Unwrap Tests")
    class UnwrapTests {

        @Test