// Assert
        assertNotNull(result, "Unwrapped transport should not be null");
        assertEquals(mockUnwrappedTransport, result, "Returned unwrapped transport should be the mocked one");
        verify(smbTransport).unwrap(SmbTransport.class); // Verify that the method was called
    }

    @Test
    void testClose() throws Exception {
        // Act
        smbTransport.close();

import java.util.concurrent.Executor;
import org.jspecify.annotations.Nullable;

/**
 * A {@link ListenableFuture} which forwards all its method calls to another future. Subclasses
 * should override one or more methods to modify the behavior of the backing future as desired per
 * the <a href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *

import com.google.common.annotations.J2ktIncompatible;
import com.google.common.base.Preconditions;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@link ImmutableSet} with exactly one element.
 *
 * @author Kevin Bourrillion
 * @author Nick Kralevich
 */
@GwtCompatible
@SuppressWarnings("serial") // uses writeReplace(), not default serialization

    public ImmutableValueGraph.Builder<N, V> addNode(N node) {
      mutableValueGraph.addNode(node);
      return this;
    }

    /**
     * Adds an edge connecting {@code nodeU} to {@code nodeV} if one is not already present, and
     * sets a value for that edge to {@code value} (overwriting the existing value, if any).
     *
     * <p>If the graph is directed, the resultant edge will be directed; otherwise, it will be

        new ByteSource() {
          @Override
          public InputStream openStream() throws IOException {
            if (counter[0]++ != 0) {
              throw new IllegalStateException("More than one source open");
            }
            return new FilterInputStream(source.openStream()) {
              @Override
              public void close() throws IOException {
                super.close();

        }

        startLatch.countDown();
        endLatch.await(10, TimeUnit.SECONDS);
        executor.shutdown();

        assertTrue(exceptions.isEmpty());
        // Final name should be from one of the threads
        assertNotNull(testTransformer.getName());
        assertTrue(testTransformer.getName().startsWith("thread"));
    }

    /**
     * Test inheritance behavior
     */

        // Calculate expected size: 1 byte for command + string bytes + 1 null terminator
        byte[] expectedString = "testfile.txt".getBytes("windows-1252");
        assertEquals(1 + expectedString.length + 1, used, "Expected exactly one command byte plus OEM string and NUL terminator");
        assertEquals(0x04, buffer[0] & 0xFF, "First byte must be SMB_COM_QUERY_INFORMATION type 0x04");
        // Verify that the string part ends with the null terminator

  private static final String NONALPHA = "0123456789`~-_=+[]{}|;:',.<>/?!@#$%^&*()\"\\";

  @Param({"20", "2000"})
  int size;

  @Param({"2", "20"})
  int nonAlphaRatio; // one non-alpha char per this many chars

  @Param boolean noWorkToDo;

  Random random;
  String testString;

  @BeforeExperiment
  void setUp() {

    // Hack to load AbstractFuture et. al. in a new classloader so that it re-reads the cancellation
    // cause system property.  This allows us to run with both settings of the property in one jvm
    // without resorting to even crazier hacks to reset static final boolean fields.
    System.setProperty("guava.concurrent.generate_cancellation_cause", "true");

import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import org.jspecify.annotations.Nullable;

/**
 * A map entry which forwards all its method calls to another map entry. Subclasses should override
 * one or more methods to modify the behavior of the backing map entry as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *