*/
    @Test
    public void testConnectedFlag() {
        assertFalse("Initially not connected", fesenClient.connected());

        // After destroy, should be disconnected
        fesenClient.destroy();
        assertFalse("Should be disconnected after destroy", fesenClient.connected());
    }

    rangeMap.put(Range.closedOpen(7, 10), 2);
    rangeMap.put(Range.closedOpen(12, 15), 2);
    rangeMap.put(Range.closedOpen(18, 19), 3);

    rangeMap.putCoalescing(Range.closedOpen(-5, -4), 0); // disconnected
    rangeMap.putCoalescing(Range.closedOpen(-6, -5), 0); // lower than minimum

    rangeMap.putCoalescing(Range.closedOpen(2, 4), 1); // between
    rangeMap.putCoalescing(Range.closedOpen(9, 14), 0); // different value

                client.close();
            } catch (final OpenSearchException e) {
                logger.warn("Failed to close OpenSearch client: address={}", address, e);
            }
            logger.info("Disconnected from {}", address);
        }
        connected = false;
    }

    /**
     * Gets the thread pool from the underlying client.
     *
     * @return The thread pool.
     */
    @Override

    // test that connected ranges are coalesced
    for (int i = 0; i + 1 < asRanges.size(); i++) {
      Range<C> range1 = asRanges.get(i);
      Range<C> range2 = asRanges.get(i + 1);
      assertFalse(range1.isConnected(range2));
    }

    // test that there are no empty ranges
    for (Range<C> range : asRanges) {
      assertFalse(range.isEmpty());
    }

    // test that the RangeSet's span is the span of all the ranges

    for (Range<Integer> query : QUERY_RANGES) {
      boolean expectIntersect = false;
      for (Range<Integer> expectedRange : rangeSet.asRanges()) {
        if (expectedRange.isConnected(query) && !expectedRange.intersection(query).isEmpty()) {
          expectIntersect = true;
          break;
        }
      }
      assertEquals(

                ftpClient.disconnect();
            } catch (final IOException e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to disconnect FTP client: connected={}", ftpClient.isConnected(), e);
                }
            }
        }
        if (logger.isDebugEnabled()) {
            logger.debug("FTP client closed");
        }
    }

    /*
     * (non-Javadoc)
     *