HHH-17256 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/embeddable/ElementCollectionInitializationTest.java

@@ -0,0 +1,137 @@
+package org.hibernate.orm.test.embeddable;
+
+import java.util.List;
+
+import org.hibernate.jpa.SpecHints;
+
+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.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.CollectionTable;
+import jakarta.persistence.Column;
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.NamedAttributeNode;
+import jakarta.persistence.NamedEntityGraph;
+import jakarta.persistence.TypedQuery;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
+import jakarta.persistence.criteria.Root;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@Jpa(
+		annotatedClasses = {
+				ElementCollectionInitializationTest.DemoEntity.class
+		}
+)
+@JiraKey( "HHH-17256" )
+public class ElementCollectionInitializationTest {
+
+	private static final Long ENTITY_ID = 1l;
+	private static final String DEMO_CONTENT = "content";
+
+	@BeforeAll
+	public void setUp(EntityManagerFactoryScope scope) {
+		scope.inTransaction(
+				entityManager -> {
+					DemoEntity entity = new DemoEntity( ENTITY_ID );
+					DemoEmbeddable embeddable = new DemoEmbeddable();
+					embeddable.setContent( DEMO_CONTENT );
+					entity.setEmbeddables( List.of( embeddable ) );
+					entityManager.persist( entity );
+				}
+		);
+	}
+
+	@Test
+	public void testInitializingCollection(EntityManagerFactoryScope scope) {
+		scope.inTransaction(
+				entityManager -> {
+					DemoEntity entity = entityManager.find( DemoEntity.class, ENTITY_ID );
+
+					CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
+					CriteriaQuery<DemoEntity> criteriaQuery = criteriaBuilder.createQuery( DemoEntity.class );
+					Root<DemoEntity> root = criteriaQuery.from( DemoEntity.class );
+					criteriaQuery.where( criteriaBuilder.equal( root.get( "id" ), ENTITY_ID ) );
+
+					TypedQuery<DemoEntity> query = entityManager.createQuery( criteriaQuery ).setHint(
+							SpecHints.HINT_SPEC_FETCH_GRAPH,
+							entityManager.getEntityGraph( "embeddables" )
+					);
+
+					query.getResultList();
+					List<DemoEmbeddable> embeddables = entity.getEmbeddables();
+					assertThat( embeddables.size() ).isEqualTo( 1 );
+					DemoEmbeddable demoEmbeddable = embeddables.get( 0 );
+					assertNotNull( demoEmbeddable );
+					assertThat( demoEmbeddable.getContent() ).isEqualTo( DEMO_CONTENT );
+				}
+		);
+	}
+
+	@Embeddable
+	public static class DemoEmbeddable {
+		@Column
+		private String content;
+
+		public String getContent() {
+			return content;
+		}
+
+		public void setContent(String content) {
+			this.content = content;
+		}
+
+		@Override
+		public String toString() {
+			return "DemoEmbeddable(" + content + ")";
+		}
+	}
+
+	@Entity(name = "DemoEntity")
+
+	@NamedEntityGraph(
+			name = "embeddables",
+			attributeNodes = {
+					@NamedAttributeNode("embeddables"),
+			})
+	public static class DemoEntity {
+		@Id
+		private Long id;
+
+		@ElementCollection
+		@CollectionTable
+		private List<DemoEmbeddable> embeddables;
+
+		public DemoEntity() {
+		}
+
+		public DemoEntity(Long id) {
+			this.id = id;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public List<DemoEmbeddable> getEmbeddables() {
+			return embeddables;
+		}
+
+		public void setEmbeddables(List<DemoEmbeddable> embeddables) {
+			this.embeddables = embeddables;
+		}
+	}
+
+}