// Should wrap Appendable in a new object
    Appendable plainAppendable = new StringBuilder();
    Writer result = CharStreams.asWriter(plainAppendable);
    assertNotSame(plainAppendable, result);
    assertNotNull(result);

    // A Writer should not be wrapped
    Appendable secretlyAWriter = new StringWriter();
    result = CharStreams.asWriter(secretlyAWriter);
    assertSame(secretlyAWriter, result);
  }

    // Should wrap Appendable in a new object
    Appendable plainAppendable = new StringBuilder();
    Writer result = CharStreams.asWriter(plainAppendable);
    assertNotSame(plainAppendable, result);
    assertNotNull(result);

    // A Writer should not be wrapped
    Appendable secretlyAWriter = new StringWriter();
    result = CharStreams.asWriter(secretlyAWriter);
    assertSame(secretlyAWriter, result);
  }

    assertEquals(1, builder.size);
    builder.add("a");
    assertEquals(1, builder.size);
    builder.add("b", "c", "d");
    assertEquals(4, builder.size);
    Object[] table = builder.hashTable;
    assertNotNull(table);
    assertSame(table, ((RegularImmutableSet<String>) builder.build()).table);
  }

  @GwtIncompatible("Builder impl")
  public void testPresizedBuilderForceCopy() {

        try {
            // Use reflection to verify ProcessDestroyer class exists
            final Class<?> destroyerClass = Class.forName("org.codelibs.fess.thumbnail.impl.CommandGenerator$ProcessDestroyer");
            assertNotNull("ProcessDestroyer class should exist", destroyerClass);
            assertTrue("ProcessDestroyer should extend TimerTask", java.util.TimerTask.class.isAssignableFrom(destroyerClass));

    @Override
    public void tearDown() throws Exception {
        // Clear WebApiManagerFactory
        super.tearDown();
    }

    // Test constructor
    public void test_constructor() {
        assertNotNull(new WebApiFilter());
    }

    // Test init method
    public void test_init() throws ServletException {
        FilterConfig filterConfig = new FilterConfig() {
            @Override

    Object key = new Object();
    assertNotNull(cache.getUnchecked(key));

    CacheTesting.simulateValueReclamation(cache, key);

    // this blocks if computation can't deal with partially-collected values
    assertNotNull(cache.getUnchecked(key));
    assertEquals(1, cache.size());
    assertEquals(2, countingLoader.getCount());

            // Test that constructor is accessible when made accessible
            constructor.setAccessible(true);
            WebApiUtil instance = constructor.newInstance();
            assertNotNull(instance);

        } catch (NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
            fail("Should be able to access private constructor: " + e.getMessage());

    }

    public void test_getEnvMap_withoutCustomMap() {
        activityHelper.setEnvMap(null);
        Map<String, String> envMap = activityHelper.getEnvMap();
        assertNotNull(envMap);
    }

    public void test_init_withDockerEnvironment() {
        Map<String, String> dockerEnv = new HashMap<>();
        dockerEnv.put("FESS_APP_TYPE", "docker");

            // Test that constructor is accessible when made accessible
            constructor.setAccessible(true);
            KuromojiCSVUtil instance = constructor.newInstance();
            assertNotNull(instance);

        } catch (NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
            fail("Should be able to access private constructor: " + e.getMessage());

        osddHelper.setEncoding("UTF-8");
        osddHelper.init();
        assertTrue(osddHelper.hasOpenSearchFile());

        final StreamResponse streamResponse = osddHelper.asStream();
        assertNotNull(streamResponse);
        assertEquals("application/opensearchdescription+xml; charset=UTF-8", streamResponse.getContentType());
    }

    public void test_multiple_init_calls() {