assertThat(expected).hasMessageThat().contains(message);
      }
      return;
    }
    fail("expected failure not reported");
  }

  private static class ForwardingRunnable implements Runnable {

    private final Runnable runnable;

    ForwardingRunnable(Runnable runnable) {
      this.runnable = runnable;
    }

    @Override
    public void run() {
      runnable.run();

    }
    assertFalse(errorNotThrown);
  }

  private static class ClassWhichDoesNotImplementEquals implements Serializable {
    private static final long serialVersionUID = 1L;
  }

  private static class ClassWhichIsAlwaysEqualButHasDifferentHashcodes implements Serializable {
    private static final long serialVersionUID = 2L;

    @SuppressWarnings("EqualsHashCode")
    @Override

    }
    assertFalse(errorNotThrown);
  }

  private static class ClassWhichDoesNotImplementEquals implements Serializable {
    private static final long serialVersionUID = 1L;
  }

  private static class ClassWhichIsAlwaysEqualButHasDifferentHashcodes implements Serializable {
    private static final long serialVersionUID = 2L;

    @SuppressWarnings("EqualsHashCode")
    @Override

        assertEquals("Complex response", response.getWrittenContent());
        assertTrue(chain.wasDoFilterCalled());
    }

    // Test implementation classes

    private static class TestWebApiManager implements WebApiManager {
        private final String basePath;
        private boolean processCalled = false;

        public TestWebApiManager(String basePath) {
            this.basePath = basePath;
        }

  @J2ktIncompatible
  @GwtIncompatible // ConcurrentLinkedQueue
  static class QueuingRemovalListener<K, V> extends ConcurrentLinkedQueue<RemovalNotification<K, V>>
      implements RemovalListener<K, V> {

    @Override
    public void onRemoval(RemovalNotification<K, V> notification) {
      add(notification);
    }
  }

  /**

This is preferred:

```groovy
public interface NewThing {
    Property<String> getSomeProperty()
}
```

This is acceptable:

```groovy
public interface NewThing {
    Property<String> getSomeProperty()
}

abstract class DefaultNewThing implements NewThing {

 * its {@code close} method. You could use a finalizer to accomplish this, but that has a
 * number of well-known problems. Here is how you might use this class instead:
 *
 * {@snippet :
 * public class MyServer implements Closeable {
 *   private static final FinalizableReferenceQueue frq = new FinalizableReferenceQueue();
 *   // You might also share this between several objects.
 *

    ForwardingObjectTester.testForwardingObject(ForwardToDelegate.class);
  }

  private abstract static class FailToForward extends ForwardingObject implements Runnable {
    @Override
    public void run() {}
  }

  private abstract static class ForwardToDelegate extends ForwardingObject implements Runnable {
    @Override
    public void run() {
      delegate().run();
    }

    @Override

 * its {@code close} method. You could use a finalizer to accomplish this, but that has a
 * number of well-known problems. Here is how you might use this class instead:
 *
 * {@snippet :
 * public class MyServer implements Closeable {
 *   private static final FinalizableReferenceQueue frq = new FinalizableReferenceQueue();
 *   // You might also share this between several objects.
 *

    return new ContainsPatternPredicate(new JdkPattern(pattern));
  }

  // End public API, begin private implementation classes.

  private enum ObjectPredicate implements Predicate<@Nullable Object> {
    /**
     * @see Predicates#alwaysTrue()
     */
    ALWAYS_TRUE {
      @Override
      public boolean apply(@Nullable Object o) {
        return true;
      }