TestService service = new TestService();
    assertEquals(0, service.startUpCalled);
    service.startAsync().awaitRunning();
    assertEquals(1, service.startUpCalled);
    assertEquals(Service.State.RUNNING, service.state());
    assertThat(service.transitionStates).containsExactly(Service.State.STARTING);
  }

  public void testStart_failed() {
    Exception exception = new Exception("deliberate");

    }

    @Test
    public void test_register_entitySet() {
        RenderData data = new RenderData();

        BsUser entity1 = new BsUser();
        entity1.setName("name1");

        BsUser entity2 = new BsUser();
        entity2.setName("name2");

        Set<BsUser> entitySet = new HashSet<>();
        entitySet.add(entity1);
        entitySet.add(entity2);

      invalidate(key);
    }
  }

  @Override
  public void invalidateAll() {
    throw new UnsupportedOperationException();
  }

  @Override
  public CacheStats stats() {
    throw new UnsupportedOperationException();
  }

  @Override
  public ConcurrentMap<K, V> asMap() {
    throw new UnsupportedOperationException();
  }

  /**

        final NullPointerException npeCause = new NullPointerException("Null query parameter");
        final IllegalStateException iseCause = new IllegalStateException("Invalid parser state");
        final OutOfMemoryError oomCause = new OutOfMemoryError("Query too large");

        // Execute
        final InvalidQueryException npeException = new InvalidQueryException(messageCode, message, npeCause);

        FessCrawlerThread crawlerThread = new FessCrawlerThread();
        assertNotNull(crawlerThread, "FessCrawlerThread should be instantiable");
    }

    /**
     * Test URL deduplication in getAnchorSet
     */
    @Test
    public void test_getAnchorSet_deduplication() {
        FessCrawlerThread crawlerThread = new FessCrawlerThread();

        List<String> urls = new ArrayList<>();

        }
    }

    // Test add multiple engines
    @Test
    public void test_add_multipleEngines() {
        TestScriptEngine engine1 = new TestScriptEngine("engine1");
        TestScriptEngine engine2 = new TestScriptEngine("engine2");
        CustomScriptEngine customEngine = new CustomScriptEngine();

        scriptEngineFactory.add("engine1", engine1);
        scriptEngineFactory.add("engine2", engine2);

        NameQueryRequest request = new NameQueryRequest(mockConfig, mockName);
        byte[] src = new byte[100];
        int srcIndex = 0;

        int result = request.readRDataWireFormat(src, srcIndex);

        assertEquals(0, result);
    }

    @Test
    void testToString() {
        // Test the toString method's output format
        NameQueryRequest request = new NameQueryRequest(mockConfig, mockName);

    BigDecimal maxDoubleAsBigDecimal = new BigDecimal(Double.MAX_VALUE);
    new RoundToDoubleTester(maxDoubleAsBigDecimal)
        .setExpectation(Double.MAX_VALUE, RoundingMode.values())
        .test();
  }

  public void testRoundToDouble_maxDoublePlusOne() {
    BigDecimal maxDoubleAsBigDecimal = new BigDecimal(Double.MAX_VALUE).add(BigDecimal.ONE);
    new RoundToDoubleTester(maxDoubleAsBigDecimal)

        orderedNodeConnections = null;
        break;
      case STABLE:
        orderedNodeConnections = new ArrayList<>();
        break;
      default:
        throw new AssertionError(incidentEdgeOrder.type());
    }

    return new DirectedGraphConnections<>(
        /* adjacentNodeValues= */ new HashMap<N, Object>(initialCapacity, INNER_LOAD_FACTOR),
        orderedNodeConnections,
        /* predecessorCount= */ 0,

        if (isWindows()) {
            return new String[]{"powershell", "-Command", "\"Get-CimInstance Win32_Process | ForEach-Object { \\\"$($_.CommandLine) $($_.ProcessId)\\\" }\""};
        } else if (isMacOS()) {
            return new String[]{"ps", "x", "-o", "pid,command"};
        } else if (isAlpine()) {
            return new String[]{"ps", "x", "-o", "pid,args"};
        } else {