Migrate JUnit 3 tests to JUnit 4

This commit migrates all remaining tests from JUnit 3 to JUnit 4, with
the exception of Spring's legacy JUnit 3.8 based testing framework that
is still in use in the spring-orm module.

Issue: SPR-13514

spring-aop/src/test/java/org/springframework/aop/support/ClassUtilsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -15,21 +15,24 @@
  */
 package org.springframework.aop.support;
 
-import junit.framework.TestCase;
+import org.junit.Test;
 
 import org.springframework.aop.framework.ProxyFactory;
 import org.springframework.tests.sample.beans.TestBean;
 import org.springframework.util.ClassUtils;
 
+import static org.junit.Assert.*;
+
 /**
  * @author Colin Sampaleanu
  * @author Juergen Hoeller
  * @author Rob Harrop
  * @author Rick Evans
  */
-public class ClassUtilsTests extends TestCase {
+public class ClassUtilsTests {
 
-	public void testGetShortNameForCglibClass() {
+	@Test
+	public void getShortNameForCglibClass() {
 		TestBean tb = new TestBean();
 		ProxyFactory pf = new ProxyFactory();
 		pf.setTarget(tb);