assertFalse(ldapManager.changePassword("", "newPassword"));
        assertFalse(ldapManager.changePassword("   ", "newPassword"));
    }

    @Test
    public void test_changePassword_withNullPassword() {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            @Override
            public boolean isLdapAdminEnabled(String username) {
                return true;
            }