HHH-15794 Add test for issue

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

@@ -0,0 +1,150 @@
+package org.hibernate.orm.test.embeddable;
+
+import java.util.HashSet;
+import java.util.Set;
+
+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 jakarta.persistence.CascadeType;
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@DomainModel(
+		annotatedClasses = {
+				NestedEmbeddedWitnNotOptionalManyToOneTest.TestEntity.class,
+				NestedEmbeddedWitnNotOptionalManyToOneTest.ChildEntity.class
+		}
+
+)
+@SessionFactory
+public class NestedEmbeddedWitnNotOptionalManyToOneTest {
+
+	@Test
+	public void testIt(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					ChildEntity child = new ChildEntity( 2, "child" );
+					SecondEmbeddable secondEmbeddable = new SecondEmbeddable( child );
+					FirstEmbeddable embedded = new FirstEmbeddable();
+					embedded.addEntry( secondEmbeddable );
+					TestEntity testEntity = new TestEntity( 1, "test", embedded );
+					session.persist( child );
+					session.persist( testEntity );
+				}
+		);
+
+		scope.inTransaction(
+				session -> {
+					TestEntity testEntity = session.get( TestEntity.class, 1 );
+					assertNotNull( testEntity );
+					FirstEmbeddable embeddedAttribute = testEntity.getEmbeddedAttribute();
+					assertNotNull( embeddedAttribute );
+					Set<SecondEmbeddable> entries = embeddedAttribute.getEntries();
+					assertThat( entries.size() ).isEqualTo( 1 );
+				}
+		);
+	}
+
+	@Entity(name = "TestEntity")
+	public static class TestEntity {
+
+		@Id
+		private Integer id;
+
+		private String name;
+
+		@Embedded
+		private FirstEmbeddable embeddedAttribute;
+
+		public TestEntity() {
+		}
+
+		public TestEntity(Integer id, String name, FirstEmbeddable embeddedAttribute) {
+			this.id = id;
+			this.name = name;
+			this.embeddedAttribute = embeddedAttribute;
+		}
+
+		public Integer getId() {
+			return id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public FirstEmbeddable getEmbeddedAttribute() {
+			return embeddedAttribute;
+		}
+	}
+
+	@Entity
+	public static class ChildEntity {
+		@Id
+		private Integer id;
+
+		private String name;
+
+		public ChildEntity() {
+		}
+
+		public ChildEntity(Integer id, String name) {
+			this.id = id;
+			this.name = name;
+		}
+
+		public Integer getId() {
+			return id;
+		}
+
+		public String getName() {
+			return name;
+		}
+	}
+
+
+	@Embeddable
+	public static class FirstEmbeddable {
+
+		@ElementCollection
+		private Set<SecondEmbeddable> entries = new HashSet<>();
+
+
+		public void addEntry(SecondEmbeddable entry) {
+			this.entries.add( entry );
+		}
+
+		public Set<SecondEmbeddable> getEntries() {
+			return entries;
+		}
+	}
+
+	@Embeddable
+	public static class SecondEmbeddable {
+
+		@ManyToOne(optional = false, cascade = CascadeType.ALL)
+		private ChildEntity child;
+
+		public SecondEmbeddable() {
+		}
+
+		public SecondEmbeddable(ChildEntity child) {
+			this.child = child;
+		}
+
+		public ChildEntity getChild() {
+			return child;
+		}
+	}
+
+}