private var authenticator = JavaNetAuthenticator()
  private val fakeDns = FakeDns()
  private val recordingAuthenticator = RecordingAuthenticator()
  private val factory =
    TestValueFactory()
      .apply {
        dns = fakeDns
      }

  @BeforeEach
  fun setup() {
    Authenticator.setDefault(recordingAuthenticator)
  }

  @AfterEach
  fun tearDown() {
    Authenticator.setDefault(null)

   * non-null objects {@code x} and {@code y}, {@code equivalence.onResultOf(function).equivalent(a,
   * b)} is true if and only if {@code equivalence.equivalent(function.apply(a), function.apply(b))}
   * is true.
   *
   * <p>For example:
   *
   * {@snippet :
   * Equivalence<Person> SAME_AGE = Equivalence.equals().onResultOf(GET_PERSON_AGE);
   * }
   *

  public void testForwarding() {
    new ForwardingWrapperTester()
        .testForwarding(
            Deque.class,
            new Function<Deque, Deque<?>>() {
              @Override
              public Deque<?> apply(Deque delegate) {
                return wrap((Deque<?>) delegate);
              }
            });
  }

  private static <T> Deque<T> wrap(Deque<T> delegate) {
    return new ForwardingDeque<T>() {
      @Override

    new ForwardingWrapperTester()
        .testForwarding(
            ListIterator.class,
            new Function<ListIterator, ListIterator<?>>() {
              @Override
              public ListIterator<?> apply(ListIterator delegate) {
                return wrap((ListIterator<?>) delegate);
              }
            });
  }

  private static <T> ListIterator<T> wrap(ListIterator<T> delegate) {

    POSSIBILITY OF SUCH DAMAGES. THIS LIMITATION OF LIABILITY SHALL NOT
    APPLY TO LIABILITY FOR DEATH OR PERSONAL INJURY RESULTING FROM SUCH
    PARTY'S NEGLIGENCE TO THE EXTENT APPLICABLE LAW PROHIBITS SUCH
    LIMITATION. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR
    LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THIS EXCLUSION
    AND LIMITATION MAY NOT APPLY TO YOU.

8. U.S. GOVERNMENT END USERS.

import org.junit.runners.model.Statement

class MockWebServerRuleTest {
  @Test fun statementStartsAndStops() {
    val rule = MockWebServerRule()
    val called = AtomicBoolean()
    val statement: Statement =
      rule.apply(
        object : Statement() {
          override fun evaluate() {
            called.set(true)
            rule.server
              .url("/")
              .toUrl()
              .openConnection()

    new ForwardingWrapperTester()
        .testForwarding(
            ListIterator.class,
            new Function<ListIterator, ListIterator<?>>() {
              @Override
              public ListIterator<?> apply(ListIterator delegate) {
                return wrap((ListIterator<?>) delegate);
              }
            });
  }

  private static <T> ListIterator<T> wrap(ListIterator<T> delegate) {

    File asciiFile = getTestFile("ascii.txt");
    File dir = asciiFile.getParentFile();
    assertTrue(Files.isDirectory().apply(dir));
    assertFalse(Files.isFile().apply(dir));

    assertFalse(Files.isDirectory().apply(asciiFile));
    assertTrue(Files.isFile().apply(asciiFile));
  }

  /** Returns a root path for the file system. */
  private static File root() {
    return File.listRoots()[0];
  }

    new ForwardingWrapperTester()
        .testForwarding(
            Collection.class,
            new Function<Collection, Collection>() {
              @Override
              public Collection apply(Collection delegate) {
                return wrap(delegate);
              }
            });
  }

  private static <T> Collection<T> wrap(Collection<T> delegate) {
    return new ForwardingCollection<T>() {

  public void testForwarding() {
    new ForwardingWrapperTester()
        .testForwarding(
            Queue.class,
            new Function<Queue, Queue>() {
              @Override
              public Queue apply(Queue delegate) {
                return wrap(delegate);
              }
            });
  }

  private static <T> Queue<T> wrap(Queue<T> delegate) {
    return new ForwardingQueue<T>() {
      @Override