String result = response.toString();
        assertNotNull(result, "toString() should not return null.");
    }

    // Helper method to access the super.toString() for verification,
    // as we cannot call it directly from the test.
    // This requires a package-private or public method in the class under test,
    // or we can just check for the prefix and suffix.

    /**
     * Test that getDefaultMappings correctly loads and returns mapping resource.
     */
    @Test
    public void testGetDefaultMappings_loadsCorrectly() throws Exception {
        // Load resource directly to verify it exists
        try (InputStream is = getClass().getClassLoader().getResourceAsStream("suggest_indices/suggest/mappings-default.json")) {
            assertNotNull("Mapping resource should exist", is);

    private SmbTransport transport;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
        // Setup transport fields that are accessed directly
        transport.tconHostName = "testHost";
        // Setup session.transport field (accessed directly in SmbTree)
        session.transport = transport;
        // Setup session to return transport via method call
        when(session.transport()).thenReturn(transport);

        System.setProperty("jcifs.properties", nonExistentPath.toString());

        // Expect no exception to be thrown, but an error logged (which we can't directly assert here)
        assertDoesNotThrow(() -> SingletonContext.init(null));
        assertNotNull(SingletonContext.getInstance()); // Should still initialize
    }

    @Test

 * Tests for {@link SmbComLockingAndX}.  The source class exposes
 * its wire-format helpers as protected methods and its internal state
 * is stored in private fields; tests make use of the same package to
 * access those members directly.
 */
@ExtendWith(MockitoExtension.class)
class SmbComLockingAndXTest {

    /**
     * Helper for setting a field via reflection.
     */

        // Assert
        assertNotNull(handle);
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcLsarOpenPolicy2.class));
        // We cannot directly assert the 'opened' field as it's private, but successful construction implies it.
    }

    @Test
    void constructor_shouldHandleNullServerSuccessfully() throws IOException {
        // Arrange

    /**
     * Handles document redirection requests.
     * Validates the document ID, logs click events if enabled, and redirects
     * to the target URL or serves file content directly if configured.
     *
     * @param form the go form containing document ID and tracking parameters
     * @return action response for redirection or content streaming

        assertNotNull(tree1);
        assertNotNull(tree2);

        // When - Release session to trigger cleanup
        session.release();

        // Then - Trees should be cleared (we can't directly verify as it's internal,
        // but the cleanup code with synchronized block ensures it happens atomically)
        // The important part is that no exception occurs and the operation is atomic
    }

    /**

        int bodyStart = headerStart + Smb2Constants.SMB2_HEADER_LENGTH;
        byte[] blob = new byte[] { 10, 20, 30, 40, 50 };
        int secBufOffset = Smb2Constants.SMB2_HEADER_LENGTH + 8; // directly after fixed part
        int sessionFlags = Smb2SessionSetupResponse.SMB2_SESSION_FLAGS_IS_GUEST;
        buildSessionSetupBody(buf, headerStart, bodyStart, sessionFlags, secBufOffset, blob);

        SmbComClose smbComClose = new SmbComClose(config, fid, lastWriteTime);

        // Then
        assertEquals(ServerMessageBlock.SMB_COM_CLOSE, smbComClose.getCommand());
        // Private fields are not directly accessible, but we can check their effect in other methods.
    }

    /**
     * Test method for {@link jcifs.internal.smb1.com.SmbComClose#writeParameterWordsWireFormat(byte[], int)}.
     */
    @Test