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  package org.apache.cayenne.dbsync.merge.token;
  
  import java.util.Collections;
  
  import org.apache.cayenne.dbsync.merge.factory.HSQLMergerTokenFactory;
  import org.apache.cayenne.dbsync.merge.factory.MergerTokenFactory;
  import org.apache.cayenne.map.DbAttribute;
  import org.apache.cayenne.map.DbEntity;
  import org.apache.cayenne.map.DbJoin;
  import org.apache.cayenne.map.DbRelationship;
  import org.apache.cayenne.map.Procedure;
  import org.junit.Assert;
  import org.junit.Test;
  
  import static org.apache.cayenne.dbsync.merge.builders.ObjectMother.dbAttr;
  import static org.apache.cayenne.dbsync.merge.builders.ObjectMother.dbEntity;
  
  /**
   * @since 4.0.
   */
  public class TokensReverseTest {
  
      @Test
      public void testReverses() {
          DbAttribute attr = dbAttr().build();
          DbEntity entity = dbEntity().attributes(attr).build();
          DbRelationship rel = new DbRelationship("rel");
          rel.setSourceEntity(entity);
          rel.addJoin(new DbJoin(rel, attr.getName(), "dontKnow"));
          Procedure procedure = new Procedure("Test");
  
          testOneToOneReverse(factory().createAddColumnToDb(entity, attr));
          testOneToOneReverse(factory().createAddColumnToModel(entity, attr));
          testOneToOneReverse(factory().createDropColumnToDb(entity, attr));
          testOneToOneReverse(factory().createDropColumnToModel(entity, attr));
  
          testOneToOneReverse(factory().createAddRelationshipToDb(entity, rel));
          testOneToOneReverse(factory().createAddRelationshipToModel(entity, rel));
          testOneToOneReverse(factory().createDropRelationshipToDb(entity, rel));
          testOneToOneReverse(factory().createDropRelationshipToModel(entity, rel));
  
          testOneToOneReverse(factory().createCreateTableToDb(entity));
          testOneToOneReverse(factory().createCreateTableToModel(entity));
          testOneToOneReverse(factory().createDropTableToDb(entity));
          testOneToOneReverse(factory().createDropTableToModel(entity));
  
          testOneToOneReverse(factory().createSetAllowNullToDb(entity, attr));
          testOneToOneReverse(factory().createSetAllowNullToModel(entity, attr));
          testOneToOneReverse(factory().createSetNotNullToDb(entity, attr));
          testOneToOneReverse(factory().createSetNotNullToModel(entity, attr));
  
          DbAttribute attr2 = dbAttr().build();
          testOneToOneReverse(factory().createSetColumnTypeToDb(entity, attr, attr2));
          testOneToOneReverse(factory().createSetColumnTypeToModel(entity, attr, attr2));
  
          testOneToOneReverse(factory().createSetPrimaryKeyToDb(entity, Collections.singleton(attr), Collections.singleton(attr2), "PK"));
          testOneToOneReverse(factory().createSetPrimaryKeyToModel(entity, Collections.singleton(attr), Collections.singleton(attr2), "PK"));
  
          testOneToOneReverse(factory().createSetValueForNullToDb(entity, attr, new DefaultValueForNullProvider()));
  
          testOneToOneReverse(factory().createDropProcedureToDb(procedure));
          testOneToOneReverse(factory().createAddProcedureToDb(procedure));
          testOneToOneReverse(factory().createDropProcedureToModel(procedure));
          testOneToOneReverse(factory().createAddProcedureToModel(procedure));
      }
  
      private void testOneToOneReverse(MergerToken token) {
          MergerToken token2 = token.createReverse(factory()).createReverse(factory());
  
          Assert.assertEquals(token.getTokenName(), token2.getTokenName());
          Assert.assertEquals(token.getTokenValue(), token2.getTokenValue());
          Assert.assertEquals(token.getDirection(), token2.getDirection());
      }
  
      private MergerTokenFactory factory() {
          return new HSQLMergerTokenFactory();
      }
  }
  