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  package org.apache.cayenne.util;
  
  import org.apache.cayenne.Cayenne;
  import org.apache.cayenne.PersistenceState;
  import org.apache.cayenne.access.DataContext;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.testdo.testmap.Artist;
  import org.apache.cayenne.unit.di.DataChannelInterceptor;
  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.assertNotNull;
  import static org.junit.Assert.assertSame;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class DeepMergeOperationIT extends RuntimeCase {
  
      @Inject
      private DataChannelInterceptor queryInterceptor;
  
      @Inject
      private DataContext context;
  
      @Inject
      private DataContext context1;
  
      @Test
      public void testDeepMergeNonExistent() {
  
          final Artist a = context.newObject(Artist.class);
          a.setArtistName("AAA");
          context.commitChanges();
  
          final DeepMergeOperation op = new DeepMergeOperation(context1);
  
          queryInterceptor.runWithQueriesBlocked(() -> {
              Artist a2 = op.merge(a);
              assertNotNull(a2);
              assertEquals(PersistenceState.COMMITTED, a2.getPersistenceState());
              assertEquals(a.getArtistName(), a2.getArtistName());
          });
      }
  
      @Test
      public void testDeepMergeModified() {
  
          final Artist a = context.newObject(Artist.class);
          a.setArtistName("AAA");
          context.commitChanges();
  
          final Artist a1 = (Artist) Cayenne.objectForPK(context1, a.getObjectId());
          a1.setArtistName("BBB");
          final DeepMergeOperation op = new DeepMergeOperation(context1);
  
          queryInterceptor.runWithQueriesBlocked(() -> {
              Artist a2 = op.merge(a);
              assertNotNull(a2);
              assertEquals(PersistenceState.MODIFIED, a2.getPersistenceState());
              assertSame(a1, a2);
              assertEquals("BBB", a2.getArtistName());
          });
      }
  
  }
  