fix testcase. #1184

core/src/main/java/com/taobao/arthas/core/advisor/Enhancer.java

@@ -197,7 +197,7 @@ public class Enhancer implements ClassFileTransformer {
 
             // 这里要再次过滤一次，为啥？因为在transform的过程中，有可能还会再诞生新的类
             // 所以需要将之前需要转换的类集合传递下来，再次进行判断
-            if (!matchingClasses.contains(classBeingRedefined)) {
+            if (matchingClasses != null && !matchingClasses.contains(classBeingRedefined)) {
                 return null;
             }
 

core/src/test/java/com/taobao/arthas/core/advisor/EnhancerTest.java

@@ -41,14 +41,10 @@ public class EnhancerTest {
 
         AdviceListener listener = Mockito.mock(AdviceListener.class);
 
-        EnhancerAffect affect = new EnhancerAffect();
+        EqualsMatcher<String> methodNameMatcher = new EqualsMatcher<String>("print");
+        EqualsMatcher<String> classNameMatcher = new EqualsMatcher<String>(MathGame.class.getName());
 
-        Set<Class<?>> matchingClasses = new HashSet<Class<?>>();
-        matchingClasses.add(MathGame.class);
-
-        EqualsMatcher<String> matcher = new EqualsMatcher<String>("print");
-
-        Enhancer enhancer = new Enhancer(listener, true, false, matchingClasses, matcher, affect);
+        Enhancer enhancer = new Enhancer(listener, true, false, classNameMatcher, methodNameMatcher);
 
         ClassLoader inClassLoader = MathGame.class.getClassLoader();
         String className = MathGame.class.getName();