private @Nullable Throwable thrown;

  @VisibleForTesting
  Closer(Suppressor suppressor) {
    this.suppressor = checkNotNull(suppressor); // checkNotNull to satisfy null tests
  }

  /**
   * Registers the given {@code closeable} to be closed when this {@code Closer} is {@linkplain
   * #close closed}.
   *
   * @return the given {@code closeable}
   */

    @Mock
    private Smb2WriteResponse mockWriteResponse;

    private SmbFileOutputStream outputStream;

    @BeforeEach
    void setUp() {
        // Common setup for most tests
        lenient().when(mockFileHandle.getTree()).thenReturn(mockTreeHandle);
        lenient().when(mockTreeHandle.getConfig()).thenReturn(mockConfig);
    }

    @Test

    }

    @Test
    public void testInvalidUncPath() throws Exception {
        // Due to normalization removing duplicate backslashes, true UNC validation doesn't work
        // These tests validate current behavior where problematic paths are caught by other checks

        // Test invalid server name with dots - caught by directory traversal check
        assertThrows(SmbException.class, () -> {

}

public boolean isWitnessServiceDiscovery() {
    return getBooleanProperty(WITNESS_SERVICE_DISCOVERY, true);
}
```

## 7. Testing Strategy

### 7.1 Unit Tests
```java
@Test
public void testWitnessRegistration() {
    WitnessRegistration registration = new WitnessRegistration(
        "\\\\server\\share", 
        InetAddress.getByName("192.168.1.100"),

import java.util.Objects;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Collections2}.
 *
 * @author Chris Povirk
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public class Collections2Test extends TestCase {
  @J2ktIncompatible
  @GwtIncompatible // suite

        partialExplicitTypeBoundIsNotSubtypeOfDifferentTypeBound(
            UseSerializableIterable<? extends Serializable> obj) {
      return notSubtype(obj);
    }
  }

  // TODO(benyu): migrate all subtyping tests from TypeTokenTest to this class using SubtypeTester.

  private interface Outdoor {}

  private interface Indoor {}

  private interface Grocery {}

  private interface Electronics {}

        inputList.clear();
        assertEquals(2, notifications.size());

        // Try to modify returned list - behavior depends on implementation
        // This tests that the implementation properly handles list modifications
        try {
            notifications.clear();
            // If this succeeds, the implementation allows modification

    private NetServerEnum2 netServerEnum2;
    private Configuration realConfig;

    @BeforeEach
    void setUp() throws Exception {
        MockitoAnnotations.openMocks(this);
        // Use real configuration for most tests
        realConfig = new BaseConfiguration(false);
        // Mock configuration setup
        when(mockConfig.getTransactionBufferSize()).thenReturn(65535);
    }

    @Test

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Unit tests on <code>MavenProperties</code>.
 */
@Deprecated
public class MavenPropertiesTest {

    private static final String LINE_SEPARATOR = System.getProperty("line.separator");

#include "tensorflow/core/platform/test.h"

using tensorflow::Status;
using tensorflow::string;
using tensorflow::TF_StatusPtr;

namespace tensorflow {
namespace {

// The tests are parameterized on:
// - a string representing the tracing implementation: "mlir" or "graphdef".
// - a boolean that when true enables TFRT as the execution engine.
class UnifiedCAPI