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  package org.apache.cayenne.runtime;
  
  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.testdo.testmap.Artist;
  import org.apache.cayenne.tx.Transaction;
  import org.apache.cayenne.tx.TransactionListener;
  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.apache.cayenne.validation.ValidationException;
  import org.junit.Test;
  
  import java.sql.Connection;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.fail;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class CayenneRuntimeIT extends RuntimeCase {
  
      @Inject
      private CayenneRuntime runtime;
  
      @Inject
      private ObjectContext context;
  
      static class DefaultListenerImpl implements TransactionListener {
  
          @Override
          public void willCommit(Transaction tx) {
          }
  
          @Override
          public void willRollback(Transaction tx) {
          }
  
          @Override
          public void willAddConnection(Transaction tx, String connectionName, Connection connection) {
          }
      }
  
      @Test
      public void testPerformInTransaction_Local_Callback() {
  
          TransactionListener callback = mock(DefaultListenerImpl.class);
          when(callback.decorateConnection(any(Transaction.class), any(Connection.class))).thenCallRealMethod();
  
          Artist a = runtime.performInTransaction(() -> {
              Artist localArtist = runtime.newContext().newObject(Artist.class);
              localArtist.setArtistName("A1");
              localArtist.getObjectContext().commitChanges();
              return localArtist;
          }, callback);
  
          assertEquals("A1", a.getArtistName());
          assertEquals(PersistenceState.COMMITTED, a.getPersistenceState());
          verify(callback).willCommit(any(Transaction.class));
          verify(callback).willAddConnection(any(Transaction.class), any(String.class), any(Connection.class));
          verify(callback, times(0)).willRollback(any(Transaction.class));
          verify(callback).decorateConnection(any(Transaction.class), any(Connection.class));
      }
  
      @Test
      public void testPerformInTransaction_Local_Callback_Rollback() {
  
          TransactionListener callback = mock(TransactionListener.class);
          when(callback.decorateConnection(any(Transaction.class), any(Connection.class))).thenCallRealMethod();
  
          try {
              runtime.performInTransaction(() -> {
                  Artist localArtist = runtime.newContext().newObject(Artist.class);
                  localArtist.getObjectContext().commitChanges();
                  return localArtist;
              }, callback);
  
              fail("Exception expected");
          } catch (ValidationException v) {
              verify(callback).willRollback(any(Transaction.class));
              verify(callback, times(0)).willAddConnection(any(Transaction.class), any(String.class), any(Connection.class));
              verify(callback, times(0)).willCommit(any(Transaction.class));
          }
      }
  
      @Test
      public void testRollbackTransaction() {
          assertEquals(0, ObjectSelect.query(Artist.class).selectCount(context));
  
          try {
              runtime.performInTransaction(() -> {
                  // Default PK batch size is 20
                  for (int i = 0; i < 30; i++) {
                      Artist artist = context.newObject(Artist.class);
                      artist.setArtistName("test" + i);
                      context.commitChanges();
                  }
  
                  // this should fail with validation error
                  context.newObject(Artist.class);
                  context.commitChanges();
                  return null;
              });
          } catch (Exception ignored) {
          }
  
          assertEquals(0, ObjectSelect.query(Artist.class).selectCount(context));
      }
  }
  