HHH-19596 Test case from example in Jira issue

Author: cigaly

hibernate-core/src/test/java/org/hibernate/orm/test/array/StructArrayWithNullElementTestDemoTest.java

@@ -0,0 +1,93 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.array;
+
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import org.hibernate.annotations.Struct;
+import org.hibernate.testing.orm.junit.*;
+import org.hibernate.testing.orm.junit.DialectFeatureChecks.SupportsStructAggregate;
+import org.hibernate.testing.orm.junit.DialectFeatureChecks.SupportsTypedArrays;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+@SessionFactory
+@DomainModel(annotatedClasses = {
+		StructArrayWithNullElementTestDemoTest.Book.class,
+		StructArrayWithNullElementTestDemoTest.Author.class
+})
+@RequiresDialectFeature(feature = SupportsStructAggregate.class)
+@RequiresDialectFeature(feature = SupportsTypedArrays.class)
+class StructArrayWithNullElementTestDemoTest {
+
+	@Test
+	void test(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			var book = new Book();
+			book.id = 1;
+			book.authors = Arrays.asList(
+					new Author( "John", "Smith" ),
+					null
+			);
+			session.persist( book );
+		} );
+
+		scope.inSession( session -> {
+			final var book = session.find( Book.class, 1 );
+			assertEquals( 2, book.authors.size() );
+			assertEquals( new Author( "John", "Smith" ), book.authors.get( 0 ) );
+			assertNull( book.authors.get( 1 ) );
+		} );
+	}
+
+	@Entity(name = "Book")
+	@Table(name = "books")
+	static class Book {
+		@Id
+		int id;
+		List<Author> authors;
+	}
+
+    @Embeddable
+    @Struct(name = "Author")
+    static final class Author {
+        String firstName;
+        String lastName;
+
+		public Author() {
+		}
+
+		public Author(String firstName, String lastName) {
+            this.firstName = firstName;
+            this.lastName = lastName;
+        }
+
+		@Override
+		public boolean equals(Object o) {
+			if (o == null || getClass() != o.getClass()) return false;
+			Author author = (Author) o;
+			return Objects.equals(firstName, author.firstName) && Objects.equals(lastName, author.lastName);
+		}
+
+		@Override
+		public int hashCode() {
+			return Objects.hash(firstName, lastName);
+		}
+
+		@Override
+        public String toString() {
+            return "Author[firstName=%s, lastName=%s]".formatted(firstName, lastName);
+        }
+
+    }
+}