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  package org.apache.cayenne.access;
  
  import java.util.List;
  
  import org.apache.cayenne.ObjectContext;
  import org.apache.cayenne.PersistenceState;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.query.ObjectSelect;
  import org.apache.cayenne.test.jdbc.DBHelper;
  import org.apache.cayenne.test.jdbc.TableHelper;
  import org.apache.cayenne.testdo.testmap.Painting;
  import org.apache.cayenne.testdo.testmap.PaintingInfo;
  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.assertFalse;
  
  /**
   * A test case for CAY-788.
   */
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class DataContextPrefetchExtras1IT extends RuntimeCase {
  
      @Inject
      protected ObjectContext context;
  
      @Inject
      protected DBHelper dbHelper;
  
      protected void createDataSet() throws Exception {
  
          TableHelper tPainting = new TableHelper(dbHelper, "PAINTING");
          tPainting.setColumns("PAINTING_ID", "PAINTING_TITLE");
  
          TableHelper tPaintingInfo = new TableHelper(dbHelper, "PAINTING_INFO");
          tPaintingInfo.setColumns("PAINTING_ID", "TEXT_REVIEW");
  
          for (int i = 1; i <= 10; i++) {
              tPainting.insert(i, "P" + i);
              tPaintingInfo.insert(i, "Review #" + i);
          }
      }
  
      @Test
      public void testPrefetchToOne() throws Exception {
          createDataSet();
  
          ObjectSelect<Painting> query = ObjectSelect.query(Painting.class)
                  .prefetch(Painting.TO_PAINTING_INFO.disjoint());
  
          List<Painting> objects = query.select(context);
          assertFalse(objects.isEmpty());
          for (Painting p : objects) {
              PaintingInfo pi = p.getToPaintingInfo();
              assertEquals(PersistenceState.COMMITTED, p.getPersistenceState());
              assertEquals(PersistenceState.COMMITTED, pi.getPersistenceState());
          }
      }
  
  }
  