assertTrue(testLdapManager.changePasswordCalled);
    }

    @Test
    public void test_changePassword_withNullPassword() {
        // Test password change with null password
        testLdapManager.changePasswordResult = false;
        testFessConfig.ldapAdminSyncPassword = false;

        boolean result = ldapChain.changePassword("testuser", null);

    }

    /**
     * Validates a password against configured password policy requirements.
     *
     * @param password The password to validate.
     * @return An empty string if the password is valid, or an error key for the validation failure.
     */
    public String validatePassword(final String password) {
        if (StringUtil.isBlank(password)) {
            return "errors.blank_password";
        }

errors.blank_password = Password is required.
errors.password_length = Password must be at least {0} characters long.
errors.password_no_uppercase = Password must contain at least one uppercase letter.
errors.password_no_lowercase = Password must contain at least one lowercase letter.
errors.password_no_digit = Password must contain at least one digit.
errors.password_no_special_char = Password must contain at least one special character.

errors.blank_password = Password is required.
errors.password_length = Password must be at least {0} characters long.
errors.password_no_uppercase = Password must contain at least one uppercase letter.
errors.password_no_lowercase = Password must contain at least one lowercase letter.
errors.password_no_digit = Password must contain at least one digit.
errors.password_no_special_char = Password must contain at least one special character.

labels.suggestWord=Suggest Word
labels.targetLabel=Label
labels.term=Term
labels.fields=Fields
labels.ex_q=Extended Query
labels.oldPassword=Current Password
labels.newPassword=New Password
labels.confirmNewPassword=New Password (Confirm)

labels.menu_system=System
labels.menu_wizard=Wizard
labels.menu_crawl_config=General
labels.menu_scheduler_config=Scheduler
labels.menu_dashboard_config=Dashboard

        boolean result = chain.changePassword(null, "password");

        assertFalse(result);
        assertEquals(1, chain.changePasswordCalls.size());
        assertNull(chain.changePasswordCalls.get(0).getKey());
        assertEquals("password", chain.changePasswordCalls.get(0).getValue());
    }

    // Test changePassword with null password
    @Test
    public void test_changePassword_nullPassword() {

        private final String password;

        public TestLoginCredential(String username, String password) {
            this.username = username;
            this.password = password;
        }

        public String getUsername() {
            return username;
        }

        public String getPassword() {
            return password;
        }
    }

        }

        paramsForBuildToolBuild(BuildToolBuildJvm, Os.LINUX)

        params {
            password(
                "env.DEVELOCITY_ACCESS_KEY",
                "%ge.gradle.org.access.key%;%develocity.grdev.net.access.key%;%develocity-ext-hetzner.grdev.net.access.key%",
            )
            password("env.ORG_GRADLE_PROJECT_botGradleGitHubToken", "%github.bot-gradle.token%")
        }

        features {

labels.suggestWord=Suggest Word
labels.targetLabel=Label
labels.term=Term
labels.fields=Fields
labels.ex_q=Extended Query
labels.oldPassword=Current Password
labels.newPassword=New Password
labels.confirmNewPassword=New Password (Confirm)

labels.menu_system=System
labels.menu_wizard=Wizard
labels.menu_crawl_config=General
labels.menu_scheduler_config=Scheduler
labels.menu_dashboard_config=Dashboard

                return "";
            }
        });

        assertEquals("errors.password_no_uppercase", systemHelper.validatePassword("password"));
        assertEquals("", systemHelper.validatePassword("Password"));
        assertEquals("", systemHelper.validatePassword("PASSWORD"));
    }

    @Test
    public void test_validatePassword_requireLowercase() {