Supplier<Integer> supplier = new CountingSupplier();
    Function<@Nullable Object, Integer> function = Functions.forSupplier(supplier);

    assertEquals(1, (int) function.apply(null));
    assertEquals(2, (int) function.apply("foo"));

    new EqualsTester()
        .addEqualityGroup(function, Functions.forSupplier(supplier))
        .addEqualityGroup(Functions.forSupplier(new CountingSupplier()))

    }

    public void test_multipleJobExecutors() {
        // Test multiple JobExecutor instances
        JobExecutor executor1 = new TestJobExecutor();
        JobExecutor executor2 = new TestJobExecutor();

        AtomicInteger counter1 = new AtomicInteger(0);
        AtomicInteger counter2 = new AtomicInteger(0);

        executor1.addShutdownListener(() -> counter1.incrementAndGet());

        verifyTokenKeep(this::asIndexHtml);

        final String diagnosticId = "log" + new SimpleDateFormat("yyyyMMddHHmm").format(ComponentUtil.getSystemHelper().getCurrentTime());
        return asStream(diagnosticId + ".zip").contentTypeOctetStream().stream(out -> {
            try (ZipOutputStream zos = new ZipOutputStream(out.stream())) {
                writeLogFiles(zos, diagnosticId);

    public void test_generateId_virtualHost() {
        final Map<String, Object> dataMap = new HashMap<String, Object>();
        dataMap.put("url", "http://example.com/");
        final List<String> roleTypeList = new ArrayList<String>();
        roleTypeList.add("admin");
        dataMap.put("role", roleTypeList);
        final List<String> virtualHostList = new ArrayList<String>();
        virtualHostList.add("site1");

      return new PopulatableMapAsMultimap<>();
    }

    @SuppressWarnings("unchecked") // all methods throw immediately
    PopulatableMapAsMultimap() {
      this.map = new HashMap<>();
      this.unusableDelegate =
          (SetMultimap<K, V>)
              newProxyInstance(
                  SetMultimap.class.getClassLoader(),
                  new Class<?>[] {SetMultimap.class},

        DynamicProperties systemProps = new DynamicProperties(file);
        ComponentUtil.register(systemProps, "systemProperties");

        relatedContentHelper = new RelatedContentHelper() {
            @Override
            public List<RelatedContent> getAvailableRelatedContentList() {
                return mockBhv.getTestData();
            }
        };

        mockBhv = new MockRelatedContentBhv();

    @Test
    @DisplayName("readn should handle EOF correctly")
    void testReadnEOF() throws IOException {
        byte[] buffer = new byte[10];
        ByteArrayInputStream bais = new ByteArrayInputStream(new byte[0]);

        int bytesRead = SessionServicePacket.readn(bais, buffer, 0, 5);

        assertEquals(0, bytesRead);
    }

    @Test
    @DisplayName("readn should handle multiple read calls")

        assertNull(user.getName());

        // Test with special characters in name
        user = new TestFessUser("******@****.***", new String[] {}, new String[] {}, new String[] {});
        assertEquals("******@****.***", user.getName());

        // Test with Unicode characters
        user = new TestFessUser("ユーザー名", new String[] {}, new String[] {}, new String[] {});

    }

    @Test
    void testEquals() {
        ToolchainModel tm1 = new ToolchainModel();
        tm1.setType("jdk");
        tm1.addProvide("version", "1.5");
        tm1.addProvide("vendor", "sun");
        Xpp3Dom configuration1 = new Xpp3Dom("configuration");
        Xpp3Dom jdkHome1 = new Xpp3Dom("jdkHome");
        jdkHome1.setValue("${env.JAVA_HOME}");
        configuration1.addChild(jdkHome1);

  @GwtIncompatible // NullPointerTester
  public void testNullPointerExceptions() {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicInstanceMethods(new FakeTicker());
  }

  @GwtIncompatible // java.time.Duration
  public void testAdvance() {
    FakeTicker ticker = new FakeTicker();
    assertEquals(0, ticker.read());
    assertSame(ticker, ticker.advance(10));
    assertEquals(10, ticker.read());