HHH-15520 Add test for issue

Author: dreab8

hibernate-core/src/test/java/org/hibernate/test/annotations/various/OneOneGeneratedValueTest.java

@@ -0,0 +1,117 @@
+package org.hibernate.test.annotations.various;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.OneToOne;
+import javax.persistence.PrimaryKeyJoinColumn;
+import javax.persistence.Table;
+
+import org.hibernate.annotations.Generated;
+import org.hibernate.annotations.GenerationTime;
+import org.hibernate.annotations.Subselect;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@TestForIssue(jiraKey = "HHH-15520")
+public class OneOneGeneratedValueTest extends BaseCoreFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] {
+				EntityA.class,
+				EntityB.class
+		};
+	}
+
+	@Test
+	public void testIt() {
+		inTransaction(
+				session -> {
+					EntityA entityA = new EntityA( 1l );
+					session.persist( entityA );
+				}
+		);
+		inTransaction(
+				session -> {
+					EntityA entityA = session.get( EntityA.class, 1l );
+					assertThat( entityA ).isNotNull();
+					EntityB entityB = entityA.getB();
+					assertThat( entityB ).isNotNull();
+					assertThat( entityB.getB() ).isEqualTo( 5l );
+				}
+		);
+	}
+
+	@Entity(name = "EntityA")
+	@Table(name = "TABLE_A")
+	public static class EntityA {
+
+		@Id
+		private Long id;
+
+		private String name;
+
+		@Generated(GenerationTime.INSERT)
+		@OneToOne(mappedBy = "a")
+		private EntityB b;
+
+		public EntityA() {
+		}
+
+		public EntityA(Long id) {
+			this.id = id;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public EntityB getB() {
+			return b;
+		}
+	}
+
+	@Entity(name = "EntityB")
+	@Subselect("SELECT 5 as b, a.id AS AId FROM TABLE_A a")
+	public static class EntityB {
+
+		private Long aId;
+
+		private EntityA a;
+
+		private Long b;
+
+		@Id
+		public Long getAId() {
+			return aId;
+		}
+
+		public void setAId(Long aId) {
+			this.aId = aId;
+		}
+
+		@OneToOne
+		@PrimaryKeyJoinColumn
+		public EntityA getA() {
+			return a;
+		}
+
+		public void setA(EntityA a) {
+			this.a = a;
+		}
+
+		public Long getB() {
+			return b;
+		}
+
+		public void setB(Long b) {
+			this.b = b;
+		}
+
+
+	}
+}