HHH-15784 Add test for primitive array as NaturalId.

hibernate-core/src/test/java/org/hibernate/orm/test/uniquekey/PrimitiveArrayNaturalIdTest.java

@@ -0,0 +1,68 @@
+package org.hibernate.orm.test.uniquekey;
+
+import org.hibernate.NaturalIdLoadAccess;
+import org.hibernate.annotations.NaturalId;
+
+import org.hibernate.testing.TestForIssue;
+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.Entity;
+import jakarta.persistence.Id;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+@TestForIssue(jiraKey = "HHH-15784")
+@DomainModel(annotatedClasses = PrimitiveArrayNaturalIdTest.HashedContent.class)
+@SessionFactory
+public class PrimitiveArrayNaturalIdTest {
+
+	@Test
+	public void testPersistByteArrayNaturalId(SessionFactoryScope scope) {
+		final byte[] naturalId = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+		scope.inTransaction(
+				session -> {
+					HashedContent content = new HashedContent(
+							1,
+							naturalId,
+							"content"
+					);
+
+					session.persist( content );
+				}
+		);
+
+		scope.inTransaction(
+				session -> {
+					NaturalIdLoadAccess<HashedContent> content = session.byNaturalId( HashedContent.class ).using(
+							"binaryHash",
+							naturalId
+					);
+					assertNotNull(content);
+				}
+		);
+	}
+
+	@Entity(name = "HashedContent")
+	public static class HashedContent {
+		@Id
+		private Integer id;
+
+		@NaturalId
+		private byte[] binaryHash;
+
+		private String name;
+
+		public HashedContent() {
+		}
+
+		public HashedContent(Integer id, byte[] binaryHash, String name) {
+			this.id = id;
+			this.binaryHash = binaryHash;
+			this.name = name;
+		}
+	}
+
+}