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  package org.apache.cayenne.access;
  
  import java.util.List;
  
  import org.apache.cayenne.DataRow;
  import org.apache.cayenne.QueryResponse;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.query.ObjectSelect;
  import org.apache.cayenne.query.QueryChain;
  import org.apache.cayenne.testdo.testmap.Artist;
  import org.apache.cayenne.unit.di.runtime.CayenneProjects;
  import org.apache.cayenne.unit.di.runtime.RuntimeCase;
  import org.apache.cayenne.unit.di.runtime.UseCayenneRuntime;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class DataContextQueryChainIT extends RuntimeCase {
  
      @Inject
      private DataContext context;
  
      @Test
      public void testSelectQuery() {
          Artist a1 = context.newObject(Artist.class);
          a1.setArtistName("X");
          context.commitChanges();
  
          QueryChain chain = new QueryChain();
          chain.addQuery(ObjectSelect.query(Artist.class));
          chain.addQuery(ObjectSelect.query(Artist.class));
  
          QueryResponse r = context.performGenericQuery(chain);
  
          // data comes back as datarows
          assertEquals(2, r.size());
          r.reset();
          r.next();
          List<?> l1 = r.currentList();
          r.next();
          List<?> l2 = r.currentList();
  
          assertTrue(l1.get(0) instanceof DataRow);
          assertTrue(l2.get(0) instanceof DataRow);
      }
  }
  