@GwtIncompatible // SerializableTester
  public void testToStringFunctionSerializable() {
    checkCanReserializeSingleton(Functions.toStringFunction());
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNullPointerExceptions() {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(Functions.class);
  }

  public void testForMapWithoutDefault() {

    private SrvCopyChunkCopyResponse response;

    @BeforeEach
    void setUp() {
        response = new SrvCopyChunkCopyResponse();
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Should create response with default values")
        void testConstructor() {

            return lastResponseData;
        }

        public void setReturnedResultData(ResultData resultData) {
            this.returnedResultData = resultData;
        }

        public void setThrowException(boolean throwException) {
            this.throwException = throwException;
        }

        public void reset() {
            transformCallCount = 0;
            lastResponseData = null;

     */
    public void test_constructor_withNullMessage() {
        CrawlerSystemException exception = new CrawlerSystemException((String) null);

        assertNotNull(exception);
        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    /**
     * Test constructor with empty message
     */
    public void test_constructor_withEmptyMessage() {

     */
    @Override
    public void setRequestCredits(final int credits) {

    }

    /**
     * @return the command
     */
    @Override
    public final int getCommand() {
        return this.command;
    }

    /**
     * @param command
     *            the command to set
     */
    @Override
    public final void setCommand(final int command) {

class HandlerTest {

    private Handler handler;

    @BeforeEach
    void setUp() {
        handler = new Handler();
    }

    @Nested
    @DisplayName("Constructor Tests")
    class ConstructorTests {

        @Test
        @DisplayName("Should create handler with default constructor")
        void testDefaultConstructor() {
            // When
            Handler testHandler = new Handler();

        public void columnId() {
            doColumn("_id");
        }

        public void columnCreatedBy() {
            doColumn("createdBy");
        }

        public void columnCreatedTime() {
            doColumn("createdTime");
        }

        public void columnName() {
            doColumn("name");
        }

        public void columnSortOrder() {
            doColumn("sortOrder");

        runner.ensureYellow();
    }

    @AfterClass
    public static void afterClass() throws Exception {
        runner.close();
        runner.clean();
    }

    @Before
    public void before() throws Exception {
        runner.admin().indices().prepareDelete("_all").execute().actionGet();
        runner.refresh();

      this.countDownLatch = countDownLatch;
    }

    @Override
    public void run() {
      countDownLatch.countDown();
    }
  }

  public void testExceptionsCaught() {
    list.add(THROWING_RUNNABLE, directExecutor());
    list.execute();
    list.add(THROWING_RUNNABLE, directExecutor());
  }

  public void testNulls() {
    new NullPointerTester().testAllPublicInstanceMethods(new ExecutionList());

  }

  @AndroidIncompatible // Android forbids null parent ClassLoader
  public void testClassPathEntries_emptyURLClassLoader_noParent() {
    assertThat(ClassPath.getClassPathEntries(new URLClassLoader(new URL[0], null)).keySet())
        .isEmpty();
  }

  @AndroidIncompatible // Android forbids null parent ClassLoader
  public void testClassPathEntries_urlClassLoader_noParent() throws Exception {
    URL url1 = new URL("file:/a");