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  package org.apache.cayenne.exp.parser;
  
  import java.util.Calendar;
  import java.util.List;
  
  import org.apache.cayenne.ObjectContext;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.exp.Expression;
  import org.apache.cayenne.exp.ExpressionFactory;
  import org.apache.cayenne.query.ObjectSelect;
  import org.apache.cayenne.test.jdbc.DBHelper;
  import org.apache.cayenne.testdo.legacy_datetime.DateTestEntity;
  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 static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotEquals;
  import static org.junit.Assert.assertNotNull;
  
  /**
   * @since 4.0
   */
  @UseCayenneRuntime(CayenneProjects.LEGACY_DATE_TIME_PROJECT)
  public class ASTFunctionCallDateIT extends RuntimeCase {
  
      @Inject
      private ObjectContext context;
  
      @Inject
      private DBHelper dbHelper;
  
      @Inject
      private UnitDbAdapter unitDbAdapter;
  
      @Before
      public void createDataSet() throws Exception {
          Calendar cal = Calendar.getInstance();
          cal.set(Calendar.MILLISECOND, 0);
  
          int year = cal.get(Calendar.YEAR);
          int month = cal.get(Calendar.MONTH);
          int day = cal.get(Calendar.DAY_OF_MONTH);
  
          DateTestEntity o1 = context.newObject(DateTestEntity.class);
          cal.set(year - 1, month, day, 0, 0, 0);
          o1.setDateColumn(cal.getTime());
          cal.set(year, month, day, 0, 0, 0);
          o1.setTimeColumn(cal.getTime());
          cal.set(Calendar.DAY_OF_MONTH, day - 1);
          o1.setTimestampColumn(cal.getTime());
  
          DateTestEntity o2 = context.newObject(DateTestEntity.class);
          cal.set(year + 1, month, day, 0, 0, 0);
          o2.setDateColumn(cal.getTime());
          cal.set(year, month, day, 23, 59, 59);
          o2.setTimeColumn(cal.getTime());
          cal.set(Calendar.DAY_OF_MONTH, day + 1);
          o2.setTimestampColumn(cal.getTime());
  
          context.commitChanges();
      }
  
      @Test
      public void testCurrentDate() throws Exception {
          Expression exp = ExpressionFactory.greaterOrEqualExp("dateColumn", new ASTCurrentDate());
          DateTestEntity res1 = ObjectSelect.query(DateTestEntity.class, exp).selectOne(context);
          assertNotNull(res1);
  
          Expression exp2 = ExpressionFactory.lessExp("dateColumn", new ASTCurrentDate());
          DateTestEntity res2 = ObjectSelect.query(DateTestEntity.class, exp2).selectOne(context);
          assertNotNull(res2);
  
          assertNotEquals(res1, res2);
      }
  
      @Test
      public void testCurrentTime() throws Exception {
          Expression exp = ExpressionFactory.greaterOrEqualExp("timeColumn", new ASTCurrentTime());
          List<DateTestEntity> res = ObjectSelect.query(DateTestEntity.class, exp).select(context);
          if(!unitDbAdapter.supportsTimeSqlType()) {
              // check only that query is executed without error
              // result will be invalid most likely as DB doesn't support TIME data type
              return;
          }
          assertEquals(1, res.size());
          DateTestEntity res1 = res.get(0);
  
          Expression exp2 = ExpressionFactory.lessExp("timeColumn", new ASTCurrentTime());
          DateTestEntity res2 = ObjectSelect.query(DateTestEntity.class, exp2).selectOne(context);
          assertNotNull(res2);
  
          assertNotEquals(res1, res2);
      }
  
      @Test
      public void testCurrentTimestamp() throws Exception {
          Expression exp = ExpressionFactory.greaterOrEqualExp("timestampColumn", new ASTCurrentTimestamp());
          DateTestEntity res1 = ObjectSelect.query(DateTestEntity.class, exp).selectOne(context);
          assertNotNull(res1);
  
          Expression exp2 = ExpressionFactory.lessExp("timestampColumn", new ASTCurrentTimestamp());
          DateTestEntity res2 = ObjectSelect.query(DateTestEntity.class, exp2).selectOne(context);
          assertNotNull(res2);
  
          assertNotEquals(res1, res2);
      }
  
      @Test
      public void testASTCurrentDateParse() {
          Expression exp = ExpressionFactory.exp("dateColumn > currentDate()");
          DateTestEntity res = ObjectSelect.query(DateTestEntity.class, exp).selectOne(context);
          assertNotNull(res);
      }
  
      @Test
      public void testASTCurrentTimeParse() {
          Expression exp = ExpressionFactory.exp("timeColumn > currentTime()");
          DateTestEntity res = ObjectSelect.query(DateTestEntity.class, exp).selectOne(context);
          if(!unitDbAdapter.supportsTimeSqlType()) {
              return;
          }
          assertNotNull(res);
      }
  
      @Test
      public void testASTCurrentTimestampParse() {
          Expression exp = ExpressionFactory.exp("timestampColumn > now()");
          DateTestEntity res = ObjectSelect.query(DateTestEntity.class, exp).selectOne(context);
          assertNotNull(res);
      }
  }
  