assertEquals(2, fields.length);
        assertEquals("displayName", fields[0]);
        assertEquals("userPrincipalName", fields[1]);
    }

    @Test
    public void test_getEntraIdPermissionFields_withLegacyFallback() {
        final Map<String, String> systemPropMap = new HashMap<>();
        FessProp.propMap.clear();
        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override