// Test with new entraid.permission.fields key
        systemPropMap.put("entraid.permission.fields", "displayName,userPrincipalName");
        String[] fields = fessConfig.getEntraIdPermissionFields();
        assertEquals(2, fields.length);
        assertEquals("displayName", fields[0]);
        assertEquals("userPrincipalName", fields[1]);
    }

    @Test
    public void test_getEntraIdPermissionFields_withLegacyFallback() {