TestCloseable c3 = closer.register(TestCloseable.normal());

    assertFalse(c1.isClosed());
    assertFalse(c2.isClosed());
    assertFalse(c3.isClosed());

    closer.close();

    assertTrue(c1.isClosed());
    assertTrue(c2.isClosed());
    assertTrue(c3.isClosed());

    assertTrue(suppressor.suppressions.isEmpty());
  }

    TestCloseable c3 = closer.register(TestCloseable.normal());

    assertFalse(c1.isClosed());
    assertFalse(c2.isClosed());
    assertFalse(c3.isClosed());

    closer.close();

    assertTrue(c1.isClosed());
    assertTrue(c2.isClosed());
    assertTrue(c3.isClosed());

    assertTrue(suppressor.suppressions.isEmpty());
  }

    assertThat(c1.socket().isClosed).isFalse()
    assertThat(c2.socket().isClosed).isFalse()

    // Add a third connection
    val c3 = factory.newConnection(pool, routeC1, 75L)

    // The third connection bounces the first.
    assertThat(pool.closeConnections(100L)).isEqualTo(0L)
    assertThat(pool.connectionCount()).isEqualTo(2)
    assertThat(c1.socket().isClosed).isTrue()

          new FinalizablePhantomReference<MyServerExampleWithFrq>(myServer, frq) {
            @Override
            public void finalizeReferent() {
              references.remove(this);
              if (!serverSocket.isClosed()) {
                try {
                  serverSocket.close();
                  finalizeReferentRan.set(true);
                } catch (IOException e) {
                  throw new UncheckedIOException(e);

        resourceManager.registerResource(resource2);

        assertFalse(resource1.isClosed());
        assertFalse(resource2.isClosed());

        int cleaned = resourceManager.forceCleanup();
        assertTrue(cleaned >= 2);

        assertTrue(resource1.isClosed());
        assertTrue(resource2.isClosed());
    }

    @Test
    @DisplayName("Test leak detection for unclosed resources")

        assertFalse(auth.isClosed());

        // Close multiple times
        auth.close();
        assertTrue(auth.isClosed());

        auth.close(); // Should not throw
        assertTrue(auth.isClosed());

        auth.close(); // Should still not throw
        assertTrue(auth.isClosed());
    }

    /**

        PooledObject<CloseableTestComponent> pooledObject = new DefaultPooledObject<>(component);

        assertFalse(component.isClosed());
        assertEquals(0, CloseableTestComponent.getCloseCount());

        closeableFactory.destroyObject(pooledObject);

        assertTrue(component.isClosed());
        assertEquals(1, CloseableTestComponent.getCloseCount());
    }

    /**

    }

    /**
     * Stop the mock witness service
     */
    public void stop() {
        running.set(false);

        if (serverSocket != null && !serverSocket.isClosed()) {
            try {
                serverSocket.close();
            } catch (IOException e) {
                log.debug("Error closing server socket", e);
            }
        }

 *     Reference<?> reference = new FinalizablePhantomReference<MyServer>(myServer, frq) {
 *       @Override
 *       public void finalizeReferent() {
 *         references.remove(this):
 *         if (!serverSocket.isClosed()) {
 *           ...log a message about how nobody called close()...
 *           try {
 *             serverSocket.close();
 *           } catch (IOException e) {
 *             ...
 *           }
 *         }

        Socket s = mock(Socket.class);
        when(s.isClosed()).thenReturn(false);
        setField(transport, "socket", s);

        // Act & Assert
        assertFalse(transport.isDisconnected());
        assertFalse(transport.isFailed());

        // Close socket -> both should be true
        when(s.isClosed()).thenReturn(true);
        assertTrue(transport.isDisconnected());