yet another time zone test

Author: gavinking

hibernate-core/src/test/java/org/hibernate/orm/test/instant/InstantTest.java

@@ -0,0 +1,64 @@
+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.instant;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import org.hibernate.annotations.JdbcTypeCode;
+import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
+import org.hibernate.testing.orm.junit.Jpa;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
+import java.time.ZoneOffset;
+
+import static org.hibernate.type.SqlTypes.TIMESTAMP;
+import static org.hibernate.type.SqlTypes.TIMESTAMP_WITH_TIMEZONE;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@Jpa(annotatedClasses = InstantTest.Instants.class)
+public class InstantTest {
+	@Test
+	public void test(EntityManagerFactoryScope scope) {
+		Instant now = Instant.now();
+		ZoneOffset zone = ZoneOffset.ofHours(1);
+		scope.getEntityManagerFactory()
+				.runInTransaction( entityManager -> {
+					Instants instants = new Instants();
+					instants.instantInUtc = now;
+					instants.instantInLocalTimeZone = now;
+					instants.instantWithTimeZone = now;
+					instants.localDateTime = LocalDateTime.ofInstant( now, zone );
+					instants.offsetDateTime = OffsetDateTime.ofInstant( now, zone );
+					instants.localDateTimeUtc = LocalDateTime.ofInstant( now, ZoneOffset.UTC );
+					instants.offsetDateTimeUtc = OffsetDateTime.ofInstant( now, ZoneOffset.UTC );
+					entityManager.persist( instants );
+				} );
+		scope.getEntityManagerFactory()
+				.runInTransaction( entityManager -> {
+					Instants instants = entityManager.find( Instants.class, 0 );
+					assertEquals( now, instants.instantInUtc );
+					assertEquals( now, instants.instantInLocalTimeZone );
+					assertEquals( now, instants.instantWithTimeZone );
+					assertEquals( now, instants.offsetDateTime.toInstant() );
+					assertEquals( now, instants.localDateTime.toInstant( zone ) );
+					assertEquals( now, instants.offsetDateTimeUtc.toInstant() );
+					assertEquals( now, instants.localDateTimeUtc.toInstant( ZoneOffset.UTC ) );
+				} );
+	}
+	@Entity
+	static class Instants {
+		@Id long id;
+		Instant instantInUtc;
+		@JdbcTypeCode(TIMESTAMP) Instant instantInLocalTimeZone;
+		@JdbcTypeCode(TIMESTAMP_WITH_TIMEZONE) Instant instantWithTimeZone;
+		LocalDateTime localDateTime;
+		OffsetDateTime offsetDateTime;
+		LocalDateTime localDateTimeUtc;
+		OffsetDateTime offsetDateTimeUtc;
+	}
+}