HHH-17934 test demonstrating bug

Signed-off-by: Gavin King <gavin@hibernate.org>

Author: gavinking

hibernate-core/src/test/java/org/hibernate/orm/test/stateless/UpsertVersionedTest.java

@@ -0,0 +1,48 @@
+package org.hibernate.orm.test.stateless;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Version;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.Assert.assertEquals;
+
+@SessionFactory
+@DomainModel(annotatedClasses = UpsertVersionedTest.Record.class)
+public class UpsertVersionedTest {
+    @Test void test(SessionFactoryScope scope) {
+        scope.inStatelessTransaction(s-> {
+            s.upsert(new Record(123L,1L,"hello earth"));
+            s.upsert(new Record(456L,2L,"hello mars"));
+        });
+        scope.inStatelessTransaction(s-> {
+            assertEquals("hello earth",s.get(Record.class,123L).message);
+            assertEquals("hello mars",s.get(Record.class,456L).message);
+        });
+        scope.inStatelessTransaction(s-> {
+            s.upsert(new Record(123L,1L,"goodbye earth"));
+        });
+        scope.inStatelessTransaction(s-> {
+            assertEquals("goodbye earth",s.get(Record.class,123L).message);
+            assertEquals("hello mars",s.get(Record.class,456L).message);
+        });
+    }
+    @Entity
+    static class Record {
+        @Id Long id;
+        @Version Long version;
+        String message;
+
+        Record(Long id, Long version, String message) {
+            this.id = id;
+            this.version = version;
+            this.message = message;
+        }
+
+        Record() {
+        }
+    }
+}