*
 * <p>The Invoker is designed to be flexible, allowing for different implementations
 * that can handle various types of {@link InvokerRequest InvokerRequests}. It also implements
 * {@link AutoCloseable} to ensure proper resource management.</p>
 *
 * @since 4.0.0
 */
@Experimental
public interface Invoker extends AutoCloseable {
    /**
     * Invokes the Maven application using the provided {@link InvokerRequest}.

        byte[] raw = new byte[] { 0x01, 0x02, 0x03, 0x04 };
        AvPair avPair = new AvPair(type, raw);

        // Modify the original raw array
        raw[0] = 0x05;

        // Ensure the AvPair's internal raw array is not affected (defensive copy not made)
        // This test assumes that the AvPair constructor does NOT make a defensive copy of the raw array.

    if (value != null) {
      return value;
    }

    // Store a local reference to the cache entry. If the backing map is immutable, this,
    // in combination with immutable cache entries, will ensure a thread-safe cache.
    CacheEntry<K, V> entry;

    // Check cache. We use == on purpose because it's cheaper and a cache miss is ok.
    entry = cacheEntry1;
    if (entry != null && entry.key == key) {

package jcifs.internal.smb2;

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Echo request message.
 *
 * This command is used to test connectivity and ensure the
 * SMB2 connection is still active.
 *
 * @author mbechler
 */
public class Smb2EchoRequest extends ServerMessageBlock2Request<Smb2EchoResponse> {

    /**
     * Constructs an SMB2 echo request

        assertEquals(-1, result);
    }

    public void test_setProcessDestroyTimeout() {
        processHelper.setProcessDestroyTimeout(20);
        // We can't directly verify the timeout value, but we can ensure the method doesn't throw
        assertTrue(true);
    }

    public void test_sendCommand_jobNotFound() {
        try {
            processHelper.sendCommand("nonexistent", "test command");

    C --> F[Witness Protocol]
    D --> F
```

## Testing Strategy

### Unit Tests
- Individual component testing for each feature
- Mock-based testing for protocol interactions
- State machine validation

### Integration Tests
- Feature interaction testing
- Network failure simulation
- Performance benchmarking
- Compatibility testing with Windows Server 2016/2019/2022

        assertEquals(NtStatus.NT_STATUS_UNSUCCESSFUL, ex.getNtStatus());

        // Verify: constructor should not have interacted with the cause
        Mockito.verifyNoInteractions(mockCause);
    }

    /**
     * Ensure toString includes the exception class name and message, providing a readable representation.
     */
    @Test
    @DisplayName("toString contains class name and message")
    void toString_containsClassAndMessage() {

    void testIsSupportedAlwaysFalse() {
        SpnegoContext ctx = newContext();
        ASN1ObjectIdentifier any = new ASN1ObjectIdentifier("1.2.840.113554.1.2.2");
        assertFalse(ctx.isSupported(any));
        // Ensure delegate is not consulted
        verify(this.mechContext, never()).isSupported(any);
    }

    @Test
    @DisplayName("initSecContext with empty len returns initial NegTokenInit and delegates to mechContext")

        // Stub the getRemoteHostName method
        when(mock.getRemoteHostName()).thenReturn("test-host");
        // Verify the stubbing
        assertEquals("test-host", mock.getRemoteHostName());
        // Ensure that the mock was interacted with
        verify(mock).getRemoteHostName();
    }

      TestCharSource failSource = new TestCharSource(STRING, option);
      TestCharSink okSink = new TestCharSink();
      assertThrows(IOException.class, () -> failSource.copyTo(okSink));
      // ensure writer was closed IF it was opened (depends on implementation whether or not it's
      // opened at all if source.newReader() throws).
      assertTrue(