User loadedUser = createTestUser("loadeduser", "Loaded User");
        chain.loadResult = loadedUser;

        User result = chain.load(inputUser);

        assertNotNull(result);
        assertEquals(loadedUser, result);
        assertEquals(1, chain.loadCalls.size());
        assertEquals(inputUser, chain.loadCalls.get(0));
    }

    // Test load with null user
    @Test

        assertEquals(user, chain3.lastUpdatedUser);
    }

    // Test changePassword with no chains
    @Test
    public void test_changePassword_noChains() {
        boolean result = authenticationManager.changePassword("testuser", "newpass");
        assertTrue(result); // Returns true when no chains present
    }

    // Test changePassword with single chain success
    @Test
    public void test_changePassword_singleChain_success() {

                        result.getMessage().getContent() != null ? result.getMessage().getContent().length() : 0);
            }

            writeJsonResponse(response, HttpServletResponse.SC_OK,
                    createSuccessResponse(result.getSessionId(), result.getMessage().getContent(), result.getMessage().getSources()));

    }

    @Override
    protected <RESULT extends AccessToken> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));

    }

    @Override
    protected <RESULT extends KeyMatch> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setBoost(DfTypeUtil.toFloat(source.get("boost")));
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));

        // Test with various locales
        OptionalThing<String> result = provider.determineAlias(Locale.ENGLISH);
        assertFalse(result.isPresent());

        result = provider.determineAlias(Locale.JAPANESE);
        assertFalse(result.isPresent());

        result = provider.determineAlias(Locale.GERMAN);
        assertFalse(result.isPresent());

        result = provider.determineAlias(null);
        assertFalse(result.isPresent());

    }

    @Override
    protected <RESULT extends RelatedContent> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setContent(DfTypeUtil.toString(source.get("content")));
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));

    }

    @Override
    protected <RESULT extends User> RESULT createEntity(final Map<String, Object> source, final Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setName(DfTypeUtil.toString(source.get(NAME)));
            result.setPassword(DfTypeUtil.toString(source.get(PASSWORD)));
            result.setGroups(toStringArray(source.get(GROUPS)));

    }

    @Override
    protected <RESULT extends RelatedQuery> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));
            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));
            result.setQueries(toStringArray(source.get("queries")));

        ComponentUtil.register(systemHelper, "systemHelper");
        ComponentUtil.setFessConfig(fessConfig);

        // Execute
        String result = pingSearchEngineJob.execute();

        // Assert
        assertEquals("Status of test-cluster is changed to GREEN.", result);
    }

    // Test normal operation with YELLOW status and no state change
    @Test
    public void test_execute_yellowStatusNoChange() {