/** Environment variable name for specifying the application type */
    private static final String FESS_APP_TYPE = "FESS_APP_TYPE";

    /** Constant value representing Docker application type */
    private static final String FESS_APP_DOCKER = "docker";

    /**
     * Protected constructor to prevent instantiation of this utility class.
     * This class is designed to be used statically.
     */
    protected ResourceUtil() {

    }

    @Test
    public void test_getOverrideConfPath() {
        // Test when app type is not docker
        OptionalEntity<String> confPath = ResourceUtil.getOverrideConfPath();
        assertNotNull(confPath);
        // Should be empty when not docker app type
        if (!"docker".equalsIgnoreCase(ResourceUtil.getAppType())) {
            assertFalse(confPath.isPresent());
        }
    }

        // Setup ingest factory
        TestIngester ingester = new TestIngester();
        ingestFactory.ingesters.add(ingester);
        ComponentUtil.register(ingestFactory, "ingestFactory");

        // Reinitialize to pick up factory
        indexUpdateCallback.init();

        DataStoreParams paramMap = new DataStoreParams();
        Map<String, Object> dataMap = new HashMap<>();
        dataMap.put("test", "value");

- **FSS Generator**: https://fss-generator.codelibs.org/
- **JSON API Reference**: https://fess.codelibs.org/12.5/user/json-response.html
- **GitHub Repository**: https://github.com/codelibs/fess
- **Docker Images**: https://hub.docker.com/r/codelibs/fess

---

    @Test
    public void test_searchWithQuery_tracksQueryString() {
        chatClient.resetSearchDocumentsCalled();
        chatClient.testSearchWithQuery("Fess Docker");
        assertEquals(1, chatClient.getSearchedQueries().size());
        assertEquals("Fess Docker", chatClient.getSearchedQueries().get(0));
    }

    @Test
    public void test_searchWithQuery_multipleSearches_tracksAll() {

        logger = LogManager.getLogger(loggerName);
        final String logFormat = ComponentUtil.getFessConfig().getAppAuditLogFormat();
        if (StringUtil.isBlank(logFormat)) {
            useEcsFormat = "docker".equals(getEnvMap().get("FESS_APP_TYPE"));
        } else if ("ecs".equals(logFormat)) {
            useEcsFormat = true;
        }
    }

    /**
     * Get the environment map.

            // but our test implementation always checks system properties
            String value2 = fessConfig.get(testKey);
            // In our test implementation, it will pick up the new value
            assertEquals(newValue, value2);
        } finally {
            // Clean up system property
            System.clearProperty(Constants.FESS_CONFIG_PREFIX + testKey);
        }
    }

        assertNotNull(envMap);
    }

    @Test
    public void test_init_withDockerEnvironment() {
        Map<String, String> dockerEnv = new HashMap<>();
        dockerEnv.put("FESS_APP_TYPE", "docker");
        activityHelper.setEnvMap(dockerEnv);
        activityHelper.init();
        assertTrue(activityHelper.useEcsFormat);
    }

    @Test
    public void test_init_withNonDockerEnvironment() {

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