Test status quo for private init/destroy methods in AOT mode

This commit only tests which init/destroy methods are "registered" in
AOT mode.

This commit does NOT test that the registered methods can actually be
invoked in AOT mode: that will be addressed in a separate commit.

See gh-30692

spring-beans/src/test/java/org/springframework/beans/factory/annotation/InitDestroyAnnotationBeanPostProcessorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,8 @@
 
 import org.junit.jupiter.api.Test;
 
+import org.springframework.beans.factory.DisposableBean;
+import org.springframework.beans.factory.InitializingBean;
 import org.springframework.beans.factory.support.AbstractBeanDefinition;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.beans.factory.support.RegisteredBean;
@@ -29,12 +31,15 @@
 import org.springframework.beans.testfixture.beans.factory.generator.lifecycle.MultiInitDestroyBean;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.SoftAssertions.assertSoftly;
 
 /**
  * Tests for {@link InitDestroyAnnotationBeanPostProcessor}.
  *
+ * @since 6.0
  * @author Stephane Nicoll
  * @author Phillip Webb
+ * @author Sam Brannen
  */
 class InitDestroyAnnotationBeanPostProcessorTests {
 
@@ -109,6 +114,35 @@ void processAheadOfTimeWhenHasMultipleInitDestroyAnnotationsAddsAllMethodNames()
 		assertThat(mergedBeanDefinition.getDestroyMethodNames()).containsExactly("anotherDestroyMethod", "destroyMethod");
 	}
 
+	@Test
+	void processAheadOfTimeWithMultipleLevelsOfPublicAndPrivateInitAndDestroyMethods() {
+		RootBeanDefinition beanDefinition = new RootBeanDefinition(CustomAnnotatedPrivateSameNameInitDestroyBean.class);
+		// We explicitly define "afterPropertiesSet" as a "custom init method"
+		// to ensure that it will be tracked as such even though it has the same
+		// name as InitializingBean#afterPropertiesSet().
+		beanDefinition.setInitMethodNames("afterPropertiesSet", "customInit");
+		// We explicitly define "destroy" as a "custom destroy method"
+		// to ensure that it will be tracked as such even though it has the same
+		// name as DisposableBean#destroy().
+		beanDefinition.setDestroyMethodNames("destroy", "customDestroy");
+		processAheadOfTime(beanDefinition);
+		RootBeanDefinition mergedBeanDefinition = getMergedBeanDefinition();
+		assertSoftly(softly -> {
+			softly.assertThat(mergedBeanDefinition.getInitMethodNames()).containsExactly(
+					"afterPropertiesSet",
+					"customInit",
+					CustomAnnotatedPrivateInitDestroyBean.class.getName() + ".privateInit", // fully-qualified private method
+					CustomAnnotatedPrivateSameNameInitDestroyBean.class.getName() + ".privateInit" // fully-qualified private method
+				);
+			softly.assertThat(mergedBeanDefinition.getDestroyMethodNames()).containsExactly(
+					"destroy",
+					"customDestroy",
+					CustomAnnotatedPrivateSameNameInitDestroyBean.class.getName() + ".privateDestroy", // fully-qualified private method
+					CustomAnnotatedPrivateInitDestroyBean.class.getName() + ".privateDestroy" // fully-qualified private method
+				);
+		});
+	}
+
 	private void processAheadOfTime(RootBeanDefinition beanDefinition) {
 		RegisteredBean registeredBean = registerBean(beanDefinition);
 		assertThat(createAotBeanPostProcessor().processAheadOfTime(registeredBean)).isNull();
@@ -133,4 +167,49 @@ private InitDestroyAnnotationBeanPostProcessor createAotBeanPostProcessor() {
 
 	static class NoInitDestroyBean {}
 
+	static class CustomInitDestroyBean {
+
+		public void customInit() {
+		}
+
+		public void customDestroy() {
+		}
+	}
+
+	static class CustomInitializingDisposableBean extends CustomInitDestroyBean
+			implements InitializingBean, DisposableBean {
+
+		@Override
+		public void afterPropertiesSet() {
+		}
+
+		@Override
+		public void destroy() {
+		}
+	}
+
+	static class CustomAnnotatedPrivateInitDestroyBean extends CustomInitializingDisposableBean {
+
+		@Init
+		private void privateInit() {
+		}
+
+		@Destroy
+		private void privateDestroy() {
+		}
+	}
+
+	static class CustomAnnotatedPrivateSameNameInitDestroyBean extends CustomAnnotatedPrivateInitDestroyBean {
+
+		@Init
+		@SuppressWarnings("unused")
+		private void privateInit() {
+		}
+
+		@Destroy
+		@SuppressWarnings("unused")
+		private void privateDestroy() {
+		}
+	}
+
 }