Fix resetting of spied FactoryBean output

Fixes gh-31204

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/MockitoPostProcessor.java

@@ -330,6 +330,7 @@ public class MockitoPostProcessor implements InstantiationAwareBeanPostProcessor
 		SpyDefinition definition = this.spies.get(beanName);
 		if (definition != null) {
 			bean = definition.createSpy(beanName, bean);
+			this.mockitoBeans.add(bean);
 		}
 		return bean;
 	}

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/mock/mockito/ResetMocksTestExecutionListenerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -47,6 +47,9 @@ class ResetMocksTestExecutionListenerTests {
 	@Autowired
 	private ApplicationContext context;
 
+	@SpyBean
+	ToSpy spied;
+
 	@Test
 	void test001() {
 		given(getMock("none").greeting()).willReturn("none");
@@ -54,6 +57,7 @@ class ResetMocksTestExecutionListenerTests {
 		given(getMock("after").greeting()).willReturn("after");
 		given(getMock("fromFactoryBean").greeting()).willReturn("fromFactoryBean");
 		assertThat(this.context.getBean(NonSingletonFactoryBean.class).getObjectInvocations).isEqualTo(0);
+		given(this.spied.action()).willReturn("spied");
 	}
 
 	@Test
@@ -63,6 +67,7 @@ class ResetMocksTestExecutionListenerTests {
 		assertThat(getMock("after").greeting()).isNull();
 		assertThat(getMock("fromFactoryBean").greeting()).isNull();
 		assertThat(this.context.getBean(NonSingletonFactoryBean.class).getObjectInvocations).isEqualTo(0);
+		assertThat(this.spied.action()).isNull();
 	}
 
 	ExampleService getMock(String name) {
@@ -116,6 +121,11 @@ class ResetMocksTestExecutionListenerTests {
 			return new NonSingletonFactoryBean();
 		}
 
+		@Bean
+		ToSpyFactoryBean toSpyFactoryBean() {
+			return new ToSpyFactoryBean();
+		}
+
 	}
 
 	static class BrokenFactoryBean implements FactoryBean<String> {
@@ -158,6 +168,14 @@ class ResetMocksTestExecutionListenerTests {
 
 	}
 
+	static class ToSpy {
+
+		String action() {
+			return null;
+		}
+
+	}
+
 	static class NonSingletonFactoryBean implements FactoryBean<ExampleService> {
 
 		private int getObjectInvocations = 0;
@@ -180,4 +198,18 @@ class ResetMocksTestExecutionListenerTests {
 
 	}
 
+	static class ToSpyFactoryBean implements FactoryBean<ToSpy> {
+
+		@Override
+		public ToSpy getObject() throws Exception {
+			return new ToSpy();
+		}
+
+		@Override
+		public Class<?> getObjectType() {
+			return ToSpy.class;
+		}
+
+	}
+
 }