code: package it.unibz.inf.ontop.docker.mysql;
  
  import it.unibz.inf.ontop.docker.AbstractVirtualModeTest;
  import it.unibz.inf.ontop.owlapi.OntopOWLEngine;
  import it.unibz.inf.ontop.owlapi.connection.OntopOWLConnection;
  import it.unibz.inf.ontop.owlapi.connection.OntopOWLStatement;
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.semanticweb.owlapi.model.OWLException;
  import org.semanticweb.owlapi.model.OWLOntologyCreationException;
  
  
  public class NestedConcatTest extends AbstractVirtualModeTest {
  
      private static final String owlfile = "/mysql/nestedconcat/test.owl";
      private static final String obdafile = "/mysql/nestedconcat/test.obda";
      private static final String propertyfile = "/mysql/nestedconcat/test.properties";
  
      private static OntopOWLEngine REASONER;
      private static OntopOWLConnection CONNECTION;
  
      @BeforeClass
      public static void before() throws OWLOntologyCreationException {
          REASONER = createReasoner(owlfile, obdafile, propertyfile);
          CONNECTION = REASONER.getConnection();
      }
  
      @Override
      protected OntopOWLStatement createStatement() throws OWLException {
          return CONNECTION.createStatement();
      }
  
      @AfterClass
      public static void after() throws Exception {
          CONNECTION.close();
          REASONER.close();
      }
  
      @Test
      public void testConcat() throws Exception {
          countResults(1, "PREFIX : <http://www.semanticweb.org/meme/ontologies/2015/3/test#>\n" +
                  "SELECT ?per ?yS ?yE\n" +
                  "WHERE{\n" +
                  "?per a :Period ; :yStart ?yS ; :yEnd ?yE\n" +
                  "}\n" +
                  "LIMIT 1");
      }
  }
  