HHH-11396 - Conversion of Date to LocalDate does not consider timezone difference

- add test case to replicate the actual root cause behind this issue

Author: vladmihalcea

hibernate-core/src/test/java/org/hibernate/test/timestamp/LocalDateCustomSessionLevelTimeZoneTest.java

@@ -0,0 +1,110 @@
+/*
+ * 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.test.timestamp;
+
+import java.time.LocalDate;
+import java.util.Map;
+import java.util.TimeZone;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.dialect.MySQLDialect;
+
+import org.hibernate.testing.RequiresDialect;
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
+import org.hibernate.test.util.jdbc.ConnectionProviderDelegate;
+import org.junit.Test;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInHibernateSessionBuilder;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author Vlad Mihalcea
+ */
+@RequiresDialect(MySQLDialect.class)
+public class LocalDateCustomSessionLevelTimeZoneTest
+		extends BaseNonConfigCoreFunctionalTestCase {
+
+	private static final TimeZone TIME_ZONE = TimeZone.getTimeZone(
+			"Europe/Berlin" );
+
+	private ConnectionProviderDelegate connectionProvider = new ConnectionProviderDelegate() {
+		@Override
+		public void configure(Map configurationValues) {
+			String url = (String) configurationValues.get( AvailableSettings.URL );
+			if(!url.contains( "?" )) {
+				url += "?";
+			}
+			else if(!url.endsWith( "&" )) {
+				url += "&";
+			}
+			url += "zeroDateTimeBehavior=convertToNull&useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=Europe/Berlin";
+
+			configurationValues.put( AvailableSettings.URL, url);
+			super.configure( configurationValues );
+		}
+	};
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class<?>[] {
+				Person.class
+		};
+	}
+
+	@Override
+	protected void addSettings(Map settings) {
+		settings.put(
+				AvailableSettings.CONNECTION_PROVIDER,
+				connectionProvider
+		);
+	}
+
+	@Override
+	protected void releaseResources() {
+		super.releaseResources();
+		connectionProvider.stop();
+	}
+
+	@Test
+	@TestForIssue( jiraKey = "HHH-11396" )
+	public void testTimeZone() {
+		TimeZone old = TimeZone.getDefault();
+		try {
+			// The producer (MySQL) Berlin and returns 1980-01-01
+			TimeZone jdbcTimeZone = TimeZone.getTimeZone( "Europe/Berlin" );
+			TimeZone.setDefault( jdbcTimeZone );
+
+			//hibernate.connection.url jdbc:mysql://localhost/hibernate_orm_test
+			doInHibernateSessionBuilder( () -> sessionFactory().withOptions().jdbcTimeZone( TIME_ZONE ), s -> {
+				Person person = new Person();
+				person.id = 1L;
+				s.persist( person );
+			} );
+
+			doInHibernateSessionBuilder( () -> sessionFactory().withOptions().jdbcTimeZone( TIME_ZONE ), s -> {
+				Person person = s.find( Person.class, 1L );
+				assertEquals( LocalDate.of( 2017, 3, 7 ), person.createdOn );
+			} );
+		}
+		finally {
+			TimeZone.setDefault( old );
+		}
+	}
+
+	@Entity(name = "Person")
+	public static class Person {
+
+		@Id
+		private Long id;
+
+		private LocalDate createdOn = LocalDate.of( 2017, 3, 7 );
+	}
+}
+