HHH-4160 Add test to check JPA compliance for deleting detached entities

hibernate-core/src/test/java/org/hibernate/orm/test/deletedetached/DeleteDetachedJpaComplianceTest.java

@@ -0,0 +1,99 @@
+/*
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.deletedetached;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.IdClass;
+import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.Jpa;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+@JiraKey("HHH-4160")
+@Jpa(annotatedClasses = {
+		DeleteDetachedJpaComplianceTest.RestaurantWithCompositeKey.class,
+		DeleteDetachedJpaComplianceTest.Restaurant.class
+})
+public class DeleteDetachedJpaComplianceTest {
+	@Test
+	void testComposite(EntityManagerFactoryScope scope) {
+		RestaurantWithCompositeKey restaurant = new RestaurantWithCompositeKey();
+		restaurant.name = "Some stuff about the thing";
+		scope.inTransaction( s -> s.persist( restaurant ) );
+		scope.inTransaction( s -> {
+			RestaurantWithCompositeKey otherRestaurant = s.find(
+					RestaurantWithCompositeKey.class,
+					new RestaurantPK( restaurant.regionId, restaurant.restaurantId )
+			);
+			assertNotNull( otherRestaurant );
+			assertThrows(IllegalArgumentException.class,
+					() -> s.remove( restaurant ),
+					"Given entity is not associated with the persistence context"
+			);
+		} );
+		scope.inTransaction( s -> {
+			assertNotNull( s.find(
+					RestaurantWithCompositeKey.class,
+					new RestaurantPK( restaurant.regionId, restaurant.restaurantId )
+			) );
+		} );
+	}
+
+	@Test
+	void testRegular(EntityManagerFactoryScope scope) {
+		Restaurant restaurant = new Restaurant();
+		restaurant.name = "Some stuff about the thing";
+		scope.inTransaction( s -> s.persist( restaurant ) );
+		scope.inTransaction( s -> {
+			Restaurant otherRestaurant = s.find( Restaurant.class, restaurant.restaurantId );
+			assertNotNull( otherRestaurant );
+			assertThrows(IllegalArgumentException.class,
+					() -> s.remove( restaurant ),
+					"Given entity is not associated with the persistence context"
+			);
+		} );
+		scope.inTransaction( s -> {
+			assertNotNull( s.find( Restaurant.class, restaurant.restaurantId ) );
+		} );
+	}
+
+	@Entity
+	static class Restaurant {
+		@Id
+		@GeneratedValue
+		long restaurantId;
+		String name;
+	}
+
+	@Entity
+	@IdClass(value = RestaurantPK.class)
+	static class RestaurantWithCompositeKey {
+		@Id
+		@GeneratedValue
+		long regionId;
+		@Id
+		@GeneratedValue
+		long restaurantId;
+		String name;
+	}
+
+	static class RestaurantPK {
+		long regionId;
+		long restaurantId;
+
+		public RestaurantPK() {
+		}
+
+		public RestaurantPK(long regionId, long restaurantId) {
+			this.regionId = regionId;
+			this.restaurantId = restaurantId;
+		}
+	}
+}