// Call retainPayload and check if it becomes true
        message.retainPayload();
        assertTrue(message.isRetainPayload(), "isRetainPayload should be true after calling retainPayload");
    }

    @Test
    void testSetAndGetRawPayload() {
        // Initially, rawPayload should be null
        assertNull(message.getRawPayload(), "rawPayload should be null initially");

/**
 * A class to allow {@link Network} implementations to be backed by a provided delegate. This is not
 * currently planned to be released as a general-purpose forwarding class.
 *
 * @author James Sexton
 * @author Joshua O'Madadhain
 */
abstract class ForwardingNetwork<N, E> extends AbstractNetwork<N, E> {

  abstract Network<N, E> delegate();

  @Override
  public Set<N> nodes() {

/**
 * A generic JUnit test which tests {@code toString()} operations on a map. Can't be invoked
 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
 *
 * @author Kevin Bourrillion
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")

 * time-limited would be extremely annoying, so this gives you a time-limiter you can easily swap in
 * for your real time-limiter while you're debugging.
 *
 * @author Kevin Bourrillion
 * @author Jens Nyman
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class FakeTimeLimiter implements TimeLimiter {
  /** Creates a new {@link FakeTimeLimiter}. */
  public FakeTimeLimiter() {}

        // Read the three data bytes
        assertEquals(1, sis.read());
        assertEquals(2, sis.read());
        assertEquals(3, sis.read());

        // After consuming all data, trying to read again will attempt to read
        // another packet header, but since there's no more data, it will throw IOException
        assertThrows(IOException.class, () -> sis.read());
    }

 * time-limited would be extremely annoying, so this gives you a time-limiter you can easily swap in
 * for your real time-limiter while you're debugging.
 *
 * @author Kevin Bourrillion
 * @author Jens Nyman
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class FakeTimeLimiter implements TimeLimiter {
  /** Creates a new {@link FakeTimeLimiter}. */
  public FakeTimeLimiter() {}

        assertTrue(checkTarget.exists(), "Target file should exist after rename");

        // Verify content is preserved
        try (InputStream in = checkTarget.getInputStream()) {
            String readContent = new String(in.readAllBytes(), "UTF-8");
            assertEquals(content, readContent, "Content should be preserved after rename");
        }

        // Best effort to verify source is gone

 * com.google.common.html.HtmlEscapers} and {@link com.google.common.xml.XmlEscapers}. To create
 * your own escapers extend this class and implement the {@link #escape(int)} method.
 *
 * @author David Beaumont
 * @since 15.0
 */
@GwtCompatible
@SuppressWarnings("EscapedEntity") // We do mean for the user to see "<" etc.
public abstract class UnicodeEscaper extends Escaper {

 * com.google.common.html.HtmlEscapers} and {@link com.google.common.xml.XmlEscapers}. To create
 * your own escapers extend this class and implement the {@link #escape(int)} method.
 *
 * @author David Beaumont
 * @since 15.0
 */
@GwtCompatible
@SuppressWarnings("EscapedEntity") // We do mean for the user to see "<" etc.
public abstract class UnicodeEscaper extends Escaper {

/**
 * A generic JUnit test which tests {@code toString()} operations on a map. Can't be invoked
 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
 *
 * @author Kevin Bourrillion
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")