Test statistics of criteria(s) executed

hibernate-core/src/test/java/org/hibernate/orm/test/stats/CriteriaStatTest.java

@@ -0,0 +1,66 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.orm.test.stats;
+
+import java.util.List;
+
+import org.hibernate.query.spi.QueryImplementor;
+import org.hibernate.stat.spi.StatisticsImplementor;
+
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+
+import org.junit.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class CriteriaStatTest extends BaseCoreFunctionalTestCase  {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] { Employee.class };
+	}
+
+	@Test
+	public void test() {
+		inTransaction( session -> {
+			StatisticsImplementor statistics = session.getSessionFactory().getStatistics();
+			statistics.setStatisticsEnabled( true );
+
+			assertThat( statistics.getQueryExecutionCount() ).isZero();
+
+			CriteriaBuilder criteriaBuilder = session.getCriteriaBuilder();
+			CriteriaQuery<Employee> criteriaQuery = criteriaBuilder.createQuery( Employee.class );
+			criteriaQuery.from( Employee.class );
+			QueryImplementor<Employee> query = session.createQuery( criteriaQuery );
+
+			List<Employee> employees = query.getResultList();
+			assertThat( employees ).isEmpty();
+
+			assertThat( statistics.getQueryExecutionCount() ).isOne();
+		} );
+	}
+
+	@Entity(name = "Employee")
+	public static class Employee {
+
+		@Id
+		private String name;
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+	}
+}