test for @SequenceGenerator/@TableGenerator with no name

Signed-off-by: Gavin King <gavin@hibernate.org>

hibernate-core/src/test/java/org/hibernate/orm/test/annotations/id/generators/AnonGeneratorTest.java

@@ -0,0 +1,45 @@
+package org.hibernate.orm.test.annotations.id.generators;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.SequenceGenerator;
+import jakarta.persistence.TableGenerator;
+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 static org.junit.jupiter.api.Assertions.assertEquals;
+
+@SessionFactory
+@DomainModel(annotatedClasses =
+		{AnonGeneratorTest.EntityWithAnonSequenceGenerator.class,
+		AnonGeneratorTest.EntityWithAnonTableGenerator.class})
+public class AnonGeneratorTest {
+	@Test
+	void testAnonGenerator(SessionFactoryScope scope) {
+		scope.inSession(s-> {
+			EntityWithAnonSequenceGenerator entity1 = new EntityWithAnonSequenceGenerator();
+			EntityWithAnonTableGenerator entity2 = new EntityWithAnonTableGenerator();
+			s.persist(entity1);
+			s.persist(entity2);
+			assertEquals(42, entity1.id);
+			assertEquals(69, entity2.id);
+		});
+	}
+	@Entity
+	static class EntityWithAnonSequenceGenerator {
+		@Id
+		@GeneratedValue
+		@SequenceGenerator(initialValue = 42)
+		long id;
+	}
+	@Entity
+	static class EntityWithAnonTableGenerator {
+		@Id
+		@GeneratedValue
+		@TableGenerator(initialValue = 69)
+		long id;
+	}
+}