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

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

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

            assertEquals("Delete failed", e.getMessage());
        }

        assertEquals(1, chain.deleteCalls.size());
    }

    // Test changePassword with valid credentials
    public void test_changePassword_success() {
        TestAuthenticationChain chain = new TestAuthenticationChain();
        chain.changePasswordResult = true;

        boolean result = chain.changePassword("testuser", "newpassword123");