### 8.1 Unit Tests
```java
package jcifs.tests.smb3;

import org.junit.Test;
import static org.junit.Assert.*;

public class PersistentHandleTest {
    
    @Test
    public void testHandleGuidGeneration() {
        HandleGuid guid1 = new HandleGuid();
        HandleGuid guid2 = new HandleGuid();
        
        assertNotEquals(guid1, guid2);
        assertEquals(16, guid1.toBytes().length);