when(mockPrincipal.getName()).thenReturn(expectedUserName);

        // Act: Call the method under test
        String actualUserName = ntlmRequest.getRemoteUser();

        // Assert: Verify that the returned user name is the expected one
        assertEquals(expectedUserName, actualUserName, "getRemoteUser should return the principal's name.");
    }

    /**

            int bytesWritten = req.writeBytesWireFormat(buffer, 0);

            // Verify structure
            assertEquals(48, SMBUtil.readInt2(buffer, 0)); // Structure size
            assertEquals(1, SMBUtil.readInt2(buffer, 2)); // Lock count

            // Verify lock sequence (bits 4-7 are sequence number, bits 0-27 are index)
            int lockSequence = SMBUtil.readInt4(buffer, 4);

import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.io.IOException;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

import org.junit.jupiter.api.BeforeEach;

        ScriptEngineException exception = new ScriptEngineException(message, cause);

        // Verify stack trace exists
        StackTraceElement[] stackTrace = exception.getStackTrace();
        assertNotNull(stackTrace);
        assertTrue(stackTrace.length > 0);

        // Verify cause's stack trace is also available
        StackTraceElement[] causeStackTrace = exception.getCause().getStackTrace();

            // Read the buffer
            int bytesRead = notification.readBytesWireFormat(buffer, 0);

            // Verify the bytes read
            assertEquals(24, bytesRead);

            // Verify the fields were set correctly using reflection
            Field oplockLevelField = Smb2OplockBreakNotification.class.getDeclaredField("oplockLevel");

        assertTrue(region.hasAccess(RdmaAccess.LOCAL_READ), "Should have local read access");
        assertTrue(region.hasAccess(RdmaAccess.REMOTE_READ), "Should have remote read access");

        // Verify provider was called
        verify(mockProvider, atLeastOnce()).registerMemory(any(ByteBuffer.class), any());
    }

    @Test
    public void testReleaseSendRegion() throws Exception {

        ScheduledJobException exception = new ScheduledJobException("Stack trace test");

        assertNotNull(exception.getStackTrace());
        assertTrue(exception.getStackTrace().length > 0);

        // Verify the first stack trace element is from this test method
        StackTraceElement firstElement = exception.getStackTrace()[0];
        assertEquals(this.getClass().getName(), firstElement.getClassName());

        // when proper conditions are not met.

        Map<String, Object> docMap = new HashMap<>();

        // This will return false because getFessConfig() will fail
        // We verify the method handles the case gracefully
        try {
            emptyGenerator.isTarget(docMap);
        } catch (IllegalStateException e) {
            // Expected when container is not initialized

     * @param length
     *            The length of the data to verify
     * @param extraPad
     *            extra padding to include in signature
     * @param msg
     *            The message to verify
     * @return whether verification was unsuccessful
     */
    boolean verify(byte[] data, int offset, int length, int extraPad, CommonServerMessageBlock msg);

            } else {
                System.clearProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);
            }
        }
    }

    public void test_constructor_isPrivate() {
        // Verify that SystemUtil has a private constructor (utility class pattern)
        try {
            Constructor<SystemUtil> constructor = SystemUtil.class.getDeclaredConstructor();