// Test delete with null user
        ldapChain.delete(null);

        assertNull(testLdapManager.deletedUser);
        assertTrue(testLdapManager.deleteCalled);
    }

    @Test
    public void test_changePassword_success() {
        // Test successful password change when LDAP admin sync is disabled
        testLdapManager.changePasswordResult = true;
        testFessConfig.ldapAdminSyncPassword = false;