* already complete, we would not initialize the subclass before calling {@link
   * #collectValueFromNonCancelledFuture}. As this is called after the subclass is constructed,
   * we're guaranteed to have properly initialized the subclass.
   */
  final void init() {
    /*

        assert (str.endsWith("]"));
    }
}

// We need to add a helper method to TransTransactNamedPipeResponse to make the test more precise
// Or create a visible subclass for testing.
// For now, let's assume we can modify the original class slightly for testability,
// or we accept the less precise testToStringFormat test.

   * {@link SortedMultiset#entrySet}, and {@link SortedMultiset#remove(Object, int)}. In many
   * situations, you may wish to override {@link SortedMultiset#elementSet} to forward to this
   * implementation or a subclass thereof.
   *
   * @since 15.0
   */
  protected class StandardElementSet extends SortedMultisets.NavigableElementSet<E> {
    /** Constructor for use by subclasses. */
    public StandardElementSet() {

import java.io.IOException;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

/**
 * Tests for SpnegoToken.
 * Uses a minimal concrete subclass to exercise abstract methods.
 */
class SpnegoTokenTest {

    /**
     * Minimal concrete implementation for testing.
     * - parse: sets mechanismToken, throws on null

        assertEquals(cause, exception.getCause(), "Cause should match the provided throwable");
    }

    @Test
    void testIsInstanceOfTransportException() {
        // Verify that RequestTimeoutException is a subclass of TransportException
        RequestTimeoutException exception = new RequestTimeoutException();
        assertTrue(exception instanceof TransportException, "RequestTimeoutException should be an instance of TransportException");

import org.jspecify.annotations.Nullable;

/**
 * A utility similar to {@link IteratorTester} for testing a {@link ListIterator} against a known
 * good reference implementation. As with {@code IteratorTester}, a concrete subclass must provide
 * target iterators on demand. It also requires three additional constructor parameters: {@code
 * elementsToInsert}, the elements to be passed to {@code set()} and {@code add()} calls; {@code

/**
 * {@link FluentFuture} that forwards all calls to a delegate.
 *
 * <h3>Extension</h3>
 *
 * If you want a class like {@code FluentFuture} but with extra methods, we recommend declaring your
 * own subclass of {@link ListenableFuture}, complete with a method like {@link #from} to adapt an
 * existing {@code ListenableFuture}, implemented atop a {@link ForwardingListenableFuture} that
 * forwards to that future and adds the desired methods.

    }

    value = getWithoutCaching(key);
    if (value != null) {
      addToCache((K) key, value);
    }
    return value;
  }

  // Internal methods (package-visible, but treat as only subclass-visible)

  @Override
  @Nullable V getIfCached(@Nullable Object key) {
    V value = super.getIfCached(key);
    if (value != null) {
      return value;
    }

            // The actual logic is tested in AbstractUpgradeGoalTest
            // Here we just verify that Apply is properly configured as a subclass
            assertInstanceOf(AbstractUpgradeGoal.class, applyGoal, "Apply should extend AbstractUpgradeGoal");
            assertTrue(applyGoal.shouldSaveModifications(), "Apply should save modifications unlike Check goal");

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.jspecify.annotations.NullUnmarked;

/**
 * Tester for typical subclass of {@link ForwardingObject} by using Mockito.
 *
 * @author Ben Yu
 */
@NullUnmarked
final class ForwardingObjectTester {

  private static final Method DELEGATE_METHOD;

  static {
    try {