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  package org.apache.cayenne.exp;
  
  import org.apache.cayenne.ObjectContext;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.exp.property.PropertyFactory;
  import org.apache.cayenne.exp.property.StringProperty;
  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.testmap.Painting;
  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.Assert;
  import org.junit.Before;
  import org.junit.Test;
  
  import java.util.List;
  
  import static org.apache.cayenne.exp.ExpressionFactory.betweenExp;
  import static org.apache.cayenne.exp.ExpressionFactory.caseWhen;
  import static org.apache.cayenne.exp.ExpressionFactory.wrapScalarValue;
  
  @UseCayenneRuntime(CayenneProjects.TESTMAP_PROJECT)
  public class CaseWhenIT extends RuntimeCase {
  
      @Inject
      private ObjectContext context;
  
      @Inject
      protected DBHelper dbHelper;
  
      @Before
      public void setUp() throws Exception {
          new TableHelper(dbHelper, "PAINTING")
                  .setColumns("PAINTING_ID", "PAINTING_TITLE", "PAINTING_DESCRIPTION", "ESTIMATED_PRICE")
                  .insert(1, "Black square", "Oil on linen, 79.5 x 79.5 cm", 15);
      }
  
      @Test
      public void caseWhenExpressionFactoryTest() {
          Expression caseWhenNoDefault = caseWhen(
                  List.of((betweenExp("estimatedPrice", 0, 9)),
                          (betweenExp("estimatedPrice", 10, 20))),
                  List.of((wrapScalarValue("firstThenResult")),
                          (wrapScalarValue("secondThenResult"))));
  
          StringProperty<String> propertyNoDefault = PropertyFactory.createString(caseWhenNoDefault, String.class);
          String result = ObjectSelect.columnQuery(Painting.class, propertyNoDefault).selectFirst(context);
          Assert.assertEquals("secondThenResult", result);
      }
  
      @Test
      public void caseWhenDefaultExpressionFactoryTest() {
          Expression caseWhenNoDefault = caseWhen(
                  List.of(betweenExp("estimatedPrice", 0, 14)),
                  List.of((wrapScalarValue("firstThenResult"))),
                  wrapScalarValue("defaultResult"));
  
          StringProperty<String> propertyNoDefault = PropertyFactory.createString(caseWhenNoDefault, String.class);
          String result = ObjectSelect.columnQuery(Painting.class, propertyNoDefault).selectFirst(context);
          Assert.assertEquals("defaultResult", result.trim());
  
      }
  
  }
  