* Fix GroovySplitterTests for the current code base

Author: artembilan

spring-integration-groovy/src/test/java/org/springframework/integration/groovy/config/GroovySplitterTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -18,8 +18,7 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
@@ -32,16 +31,14 @@
 import org.springframework.messaging.Message;
 import org.springframework.messaging.MessageChannel;
 import org.springframework.messaging.MessageHandler;
-import org.springframework.test.context.ContextConfiguration;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 
 /**
  * @author Mark Fisher
  * @author Artem Bilan
  * @since 2.0
  */
-@ContextConfiguration
-@RunWith(SpringJUnit4ClassRunner.class)
+@SpringJUnitConfig
 public class GroovySplitterTests {
 
 	@Autowired
@@ -82,10 +79,10 @@ public void inlineScript() {
 	public void testInt2433VerifyRiddingOfMessageProcessorsWrapping() {
 		assertThat(this.groovySplitterMessageHandler instanceof MethodInvokingSplitter).isTrue();
 		@SuppressWarnings("rawtypes")
-		MessageProcessor messageProcessor = TestUtils.getPropertyValue(this.groovySplitterMessageHandler,
-				"messageProcessor", MessageProcessor.class);
+		MessageProcessor messageProcessor =
+				TestUtils.getPropertyValue(this.groovySplitterMessageHandler, "processor", MessageProcessor.class);
 		//before it was MethodInvokingMessageProcessor
-		assertThat(messageProcessor instanceof GroovyScriptExecutingMessageProcessor).isTrue();
+		assertThat(messageProcessor).isInstanceOf(GroovyScriptExecutingMessageProcessor.class);
 	}
 
 }