@Test
public void countryAssociationIssueTest() {

    ReadOnlyDataSource dataSource = new ResourceDataSource("countryIssue", new ResourceSet("/", "countryIssue.uct"));
    Network network = new UcteImporter().importData(dataSource, null);
    assertEquals(Country.ES, network.getSubstation("EHORTA").getCountry().orElse(null));
    assertEquals(1, network.getSubstation("EHORTA").getVoltageLevelStream().count());
    assertEquals(Country.BE, network.getSubstation("BHORTA").getCountry().orElse(null));
    assertEquals(1, network.getSubstation("BHORTA").getVoltageLevelStream().count());
}