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  package org.apache.cayenne.access;
  
  import org.apache.cayenne.CayenneRuntimeException;
  import org.apache.cayenne.DataRow;
  import org.apache.cayenne.ObjectContext;
  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.no_pk.NoPkTestEntity;
  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.Before;
  import org.junit.Test;
  
  import java.util.List;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertTrue;
  
  @UseCayenneRuntime(CayenneProjects.NO_PK_PROJECT)
  public class DataContextNoPkIT extends RuntimeCase {
  
      @Inject
      protected ObjectContext context;
  
      @Inject
      protected DBHelper dbHelper;
  
      @Before
      public void setUp() throws Exception {
          TableHelper noPkTestTable = new TableHelper(dbHelper, "NO_PK_TEST", "ATTRIBUTE1");
          noPkTestTable.deleteAll();
  
          noPkTestTable.insert(1);
          noPkTestTable.insert(2);
      }
  
      @Test(expected = CayenneRuntimeException.class)
      public void testNoPkFetchObjects() {
          ObjectSelect.query(NoPkTestEntity.class).select(context);
      }
  
      @Test
      public void testNoPkFetchDataRows() {
  
          List<DataRow> rows = ObjectSelect.dataRowQuery(NoPkTestEntity.class).select(context);
          assertNotNull(rows);
          assertEquals(2, rows.size());
  
          DataRow row1 = rows.get(0);
          DataRow row2 = rows.get(1);
  
          // assert that rows have different values
          // (there was a bug earlier that fetched distinct rows for
          // entities with no primary key.
          assertTrue(!row1.get("ATTRIBUTE1").equals(row2.get("ATTRIBUTE1")));
      }
  }
  