GH-3679: Better caching for SpringIntegrationTest (#3792)

* GH-3679: Better caching for SpringIntegrationTest

Fixes https://github.com/spring-projects/spring-integration/issues/3679

The `@SpringIntegrationTest` makes a test cache key based on its attributes values
when the same application context can be used in different test classes
with different endpoints to have stopped originally.

* Rework an `IntegrationEndpointsInitializer` to the `SpringIntegrationTestExecutionListener`
which consult a `MockIntegrationContext` for endpoints to be started or not before
the test execution and definitely stopped after the test execution to have a flexibility
with the cached context
* Improve a `MockIntegrationContext` to gather `AbstractEndpoint` beans and have them
marked for stopping in the beginning of the application context.
The `SpringIntegrationTestExecutionListener` takes care about startup in its `beforeTestClass()`
* Verify different state for the `SpringIntegrationTest` with the `CachedSpringIntegrationTestAnnotationTests`

* * Improve `SpringIntegrationTestExecutionListener` performance
when no `@SpringIntegrationTest.noAutoStartup()` is configured
* Fix `CachedSpringIntegrationTestAnnotationTests` check `isRunning()`
for the endpoint under the testing instead of `isAutoStartup()`
which is changed in one test class, but not other, and the order
of their execution would matter
* Migrate `MockMessageSourceTests` to JUnit 5 as a roadmap of the whole project

* Fixes https://github.com/spring-projects/spring-integration/issues/3787

spring-integration-test/src/test/java/org/springframework/integration/test/mock/CachedSpringIntegrationTestAnnotationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2019 the original author or authors.
+ * Copyright 2018-2022 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.
@@ -20,9 +20,11 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 import org.junit.jupiter.api.Test;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.integration.endpoint.AbstractEndpoint;
 import org.springframework.integration.test.context.SpringIntegrationTest;
 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 
@@ -37,22 +39,28 @@ public abstract class CachedSpringIntegrationTestAnnotationTests {
 
 	private static int beanFactoryPostProcessorCallCounter;
 
+	@Autowired
+	protected AbstractEndpoint someEndpoint;
+
 	public static class SpringIntegrationTestAnnotationCaching1Tests
 			extends CachedSpringIntegrationTestAnnotationTests {
 
 		@Test
 		public void testSingleApplicationContext() {
 			assertThat(beanFactoryPostProcessorCallCounter).isEqualTo(1);
+			assertThat(this.someEndpoint.isRunning()).isTrue();
 		}
 
 	}
 
+	@SpringIntegrationTest(noAutoStartup = "someEndpoint")
 	public static class SpringIntegrationTestAnnotationCaching2Tests
 			extends CachedSpringIntegrationTestAnnotationTests {
 
 		@Test
 		public void testSingleApplicationContext() {
 			assertThat(beanFactoryPostProcessorCallCounter).isEqualTo(1);
+			assertThat(this.someEndpoint.isRunning()).isFalse();
 		}
 
 	}
@@ -65,6 +73,23 @@ public abstract class CachedSpringIntegrationTestAnnotationTests {
 			return beanFactory -> beanFactoryPostProcessorCallCounter++;
 		}
 
+		@Bean
+		public AbstractEndpoint someEndpoint() {
+			return new AbstractEndpoint() {
+
+				@Override
+				protected void doStart() {
+
+				}
+
+				@Override
+				protected void doStop() {
+
+				}
+
+			};
+		}
+
 	}
 
 }

spring-integration-test/src/test/java/org/springframework/integration/test/mock/MockMessageSourceTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2019 the original author or authors.
+ * Copyright 2017-2022 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.
@@ -19,9 +19,8 @@ package org.springframework.integration.test.mock;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.fail;
 
-import org.junit.After;
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.BeanNotOfRequiredTypeException;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -47,16 +46,14 @@ import org.springframework.integration.test.context.SpringIntegrationTest;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.support.GenericMessage;
 import org.springframework.test.annotation.DirtiesContext;
-import org.springframework.test.context.ContextConfiguration;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 
 /**
  * @author Artem Bilan
  *
  * @since 5.0
  */
-@RunWith(SpringRunner.class)
-@ContextConfiguration(classes = MockMessageSourceTests.Config.class)
+@SpringJUnitConfig(classes = MockMessageSourceTests.Config.class)
 @SpringIntegrationTest(noAutoStartup = { "inboundChannelAdapter", "*Source*" })
 @DirtiesContext
 public class MockMessageSourceTests {
@@ -73,7 +70,7 @@ public class MockMessageSourceTests {
 	@Autowired
 	private IntegrationFlowContext integrationFlowContext;
 
-	@After
+	@AfterEach
 	public void tearDown() {
 		this.mockIntegrationContext.resetBeans("mySourceEndpoint", "inboundChannelAdapter");
 		this.results.purge(null);