@Override
    public void setUp() throws Exception {
        // create runner instance
        runner = new OpenSearchRunner();
        // create ES nodes
        final String clusterName = UUID.randomUUID().toString();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");

        FessSystemException exception = new FessSystemException(cause);

        assertEquals(cause, exception.getCause());
        // When constructed with cause only, message contains the cause's toString()
        assertTrue(exception.getMessage().contains(cause.getClass().getName()));
        assertTrue(exception.getMessage().contains("Cause exception"));
    }

    public void test_constructor_withNullMessage() {

        node[3] = B(hex_to_bin(arr, 30, 2));
        node[4] = B(hex_to_bin(arr, 32, 2));
        node[5] = B(hex_to_bin(arr, 34, 2));
    }

    @Override
    public String toString() {
        return bin_to_hex(time_low, 8) + '-' + bin_to_hex(time_mid, 4) + '-' + bin_to_hex(time_hi_and_version, 4) + '-'

			} else {
				vars[idx] = escaper + "<binary>" + escaper
			}
		case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
			vars[idx] = utils.ToString(v)
		case float32:
			vars[idx] = strconv.FormatFloat(float64(v), 'f', -1, 32)
		case float64:
			vars[idx] = strconv.FormatFloat(v, 'f', -1, 64)
		case string:

        if (userAgentPattern == null) {
            userAgentPattern = Pattern.compile(getUserAgent());
        }
        return userAgentPattern.matcher(input);
    }

    @Override
    public String toString() {
        return "PathMapping [regexPattern=" + regexPattern + ", createdBy=" + createdBy + ", createdTime=" + createdTime + ", processType="

        sb.append(userTypeSupplier.supply().orElse("_"));
        sb.append(",").append(appTypeSupplier.supply()).append(",").append(resource.getModuleName());
        final String trace = sb.toString();
        final int columnSize = 200;
        return trace.length() > columnSize ? trace.substring(0, columnSize) : trace;
    }

    // Don't bother testing: Verify is like Preconditions. See the discussion on that class.
  }

  private static final Object IGNORE_ME =
      new Object() {
        @Override
        public String toString() {
          throw new AssertionFailedError();
        }
      };

  private static final String FORMAT = "I ate %s pies.";

  private static void checkMessage(Exception e) {

     */
    public DfsReferral() {
        this.next = this;
    }

    void append(final DfsReferral dr) {
        dr.next = next;
        next = dr;
    }

    @Override
    public String toString() {
        return "DfsReferral[pathConsumed=" + pathConsumed + ",server=" + server + ",share=" + share + ",link=" + link + ",path=" + path

    }

    @Override
    public int hashCode() {
      refreshIfEmpty();
      return delegate.hashCode();
    }

    @Override
    public String toString() {
      refreshIfEmpty();
      return delegate.toString();
    }

    Collection<V> getDelegate() {
      return delegate;
    }

    @Override
    public Iterator<V> iterator() {
      refreshIfEmpty();

        result = netShareEnum.readDataWireFormat(buffer, 0, 0);
        assertEquals(0, result);
    }

    @Test
    @DisplayName("Test toString method")
    void testToString() {
        netShareEnum = new NetShareEnum(realConfig);

        String result = netShareEnum.toString();

        assertNotNull(result);
        assertTrue(result.startsWith("NetShareEnum["));
        assertTrue(result.endsWith("]"));