Polish "Prevent container to be closed twice"

See gh-35120

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/lifecycle/TestcontainersLifecycleApplicationContextInitializer.java

@@ -23,7 +23,7 @@ import org.springframework.context.ConfigurableApplicationContext;
 
 /**
  * {@link ApplicationContextInitializer} to manage the lifecycle of {@link Startable
- * startable container}.
+ * startable containers}.
  *
  * @author Phillip Webb
  * @since 3.1.0

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/lifecycle/TestcontainersLifecycleBeanPostProcessor.java

@@ -20,16 +20,16 @@ import org.testcontainers.lifecycle.Startable;
 
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.config.BeanPostProcessor;
-import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
 
 /**
  * {@link BeanPostProcessor} to manage the lifecycle of {@link Startable startable
- * container}.
+ * containers}.
  *
  * @author Phillip Webb
+ * @author Stephane Nicoll
  * @see TestcontainersLifecycleApplicationContextInitializer
  */
-class TestcontainersLifecycleBeanPostProcessor implements DestructionAwareBeanPostProcessor {
+class TestcontainersLifecycleBeanPostProcessor implements BeanPostProcessor {
 
 	@Override
 	public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
@@ -39,14 +39,4 @@ class TestcontainersLifecycleBeanPostProcessor implements DestructionAwareBeanPo
 		return bean;
 	}
 
-	@Override
-	public void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException {
-		// Startable extends AutoCloseable will always be closed by context
-	}
-
-	@Override
-	public boolean requiresDestruction(Object bean) {
-		return bean instanceof Startable;
-	}
-
 }

spring-boot-project/spring-boot-testcontainers/src/test/java/org/springframework/boot/testcontainers/lifecycle/TestcontainersLifecycleApplicationContextInitializerTests.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2012-2023 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.testcontainers.lifecycle;
+
+import org.junit.jupiter.api.Test;
+import org.testcontainers.lifecycle.Startable;
+
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+import static org.mockito.BDDMockito.then;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+
+/**
+ * Tests for {@link TestcontainersLifecycleApplicationContextInitializer}.
+ *
+ * @author Stephane Nicoll
+ */
+class TestcontainersLifecycleApplicationContextInitializerTests {
+
+	@Test
+	void whenStartableBeanInvokesStartOnRefresh() {
+		Startable container = mock(Startable.class);
+		try (AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext()) {
+			applicationContext.registerBean("container", Startable.class, () -> container);
+			new TestcontainersLifecycleApplicationContextInitializer().initialize(applicationContext);
+			then(container).shouldHaveNoInteractions();
+			applicationContext.refresh();
+			then(container).should().start();
+		}
+	}
+
+	@Test
+	void whenStartableBeanInvokesDestroyOnShutdown() {
+		Startable mock = mock(Startable.class);
+		AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext();
+		applicationContext.registerBean("container", Startable.class, () -> mock);
+		new TestcontainersLifecycleApplicationContextInitializer().initialize(applicationContext);
+		applicationContext.refresh();
+		then(mock).should(never()).close();
+		applicationContext.close();
+		then(mock).should().close();
+	}
+
+}