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  package org.apache.cayenne.dba;
  
  import org.apache.cayenne.access.DataNode;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.map.DbEntity;
  import org.apache.cayenne.unit.UnitDbAdapter;
  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.ArrayList;
  import java.util.List;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertTrue;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class PkGeneratorIT extends RuntimeCase {
  
      @Inject
      private UnitDbAdapter accessStackAdapter;
  
      @Inject
      private DataNode node;
  
      private PkGenerator pkGenerator;
      private DbEntity paintingEntity;
  
      @Before
      public void setUp() throws Exception {
          pkGenerator = node.getAdapter().getPkGenerator();
          paintingEntity = node.getEntityResolver().getDbEntity("PAINTING");
  
          List<DbEntity> list = new ArrayList<DbEntity>();
          list.add(paintingEntity);
          pkGenerator.createAutoPk(node, list);
          pkGenerator.reset();
      }
  
      @Test
      public void testGeneratePkForDbEntity() throws Exception {
          List<Object> pkList = new ArrayList<Object>();
  
          int testSize = (pkGenerator instanceof JdbcPkGenerator)
                  ? ((JdbcPkGenerator) pkGenerator).getPkCacheSize() * 2
                  : 25;
          if (testSize < 25) {
              testSize = 25;
          }
  
          for (int i = 0; i < testSize; i++) {
              Object pk = pkGenerator.generatePk(node, paintingEntity
                      .getPrimaryKeys()
                      .iterator()
                      .next());
              assertNotNull(pk);
              assertTrue(pk instanceof Number);
  
              // check that the number is continuous
              // of course this assumes a single-threaded test
              if (accessStackAdapter.supportsBatchPK() && pkList.size() > 0) {
                  Number last = (Number) pkList.get(pkList.size() - 1);
                  assertEquals(last.intValue() + 1, ((Number) pk).intValue());
              }
  
              pkList.add(pk);
          }
      }
  }
  