blocks|key|661304|text|Mockito.doThrow(new+NullpointerException()).when(spy).get(0);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|661305|我认为这里的问题是你正在尝试做一个部分模拟，所以你必须在你的测试类上有注解：|unstyled|661306|@PrepareForTest(List.class)|661307|这可能会也可能不会起作用。在我测试异常处理的代码中，我总是在完全模拟的对象上执行异常处理，而不是部分模拟的对象。此外，我在部分模拟时广泛使用了PowerMockito，所以库可能会做你需要的事情。|661308|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>Mockito.doThrow(new NullpointerException()).when(spy).get(0);
</code></pre>

I think the problem here is that you are trying to do a partial mock and so you have to have the annotation on your test class:

<pre><code>@PrepareForTest(List.class)
</code></pre>

This may or may not work. Looking at my code where I test exception handling, I always have done it on a fully-mocked object, not a partially mocked one. Also, I have made extensive use of PowerMockito when partial mocking, so it is possible that library will do what you need.

blocks|key|661404|text|import+static+org.mockito.Mockito.doThrow;
import+static+org.mockito.Mockito.spy;

import+java.lang.reflect.Method;

import+org.junit.Test;

import+net.sf.cglib.proxy.Enhancer;
import+net.sf.cglib.proxy.MethodInterceptor;
import+net.sf.cglib.proxy.MethodProxy;

public+class+MockitoSpyTest+{

++++@Test
++++public+void+execTest()+{

++++++++System.out.println("***+TEST+1+***");
++++++++System.out.println("Test+on+unmodified+object");
++++++++MySet+ms+=+new+MySetImpl();
++++++++ms.set("test+value");
++++++++System.out.println("Set+contains:+"+%2B+ms.get());

++++++++//+decorate+ms1+with+easymock
++++++++System.out.println("\n***+TEST+2+***");
++++++++MySet+spyMs+=+spy(ms);
++++++++doThrow(new+NullPointerException("my+test+nullpointer")).when(spyMs).get();
++++++++System.out.println("Test+decorated+object+with+SPY");
++++++++spyMs.set("test+value");
++++++++try+{
++++++++++++System.out.println("Set+contains:+"+%2B+spyMs.get());
++++++++}+catch+(NullPointerException+e)+{
++++++++++++System.out.println("NullPointerException+-+as+expected");
++++++++}

++++++++//+Enhance+call+with+CGLIB
++++++++System.out.println("\n***+TEST+3+***");
++++++++System.out.println("Test+on+CGLIB+decorated+object");
++++++++Enhancer+enc+=+new+Enhancer();
++++++++enc.setSuperclass(MySetImpl.class);
++++++++enc.setInterfaces(new+Class[]+{+MySet.class+});
++++++++enc.setCallback(new+MethodInterceptor()+{

++++++++++++@Override
++++++++++++public+Object+intercept(Object+obj,+Method+method,+Object[]+args,+MethodProxy+proxy)+throws+Throwable+{
++++++++++++++++if+("get".equals(method.getName()))+{
++++++++++++++++++++System.out.println("CGLIB+decorated+GET+call");
++++++++++++++++}
++++++++++++++++return+proxy.invokeSuper(obj,+args);
++++++++++++}
++++++++});
++++++++MySet+ms1+=+(MySet)+enc.create();
++++++++ms1.set("test+value");
++++++++System.out.println("Set+contains:+"+%2B+ms1.get());

++++++++//+decorate+ms1+with+easymock
++++++++System.out.println("\n***+TEST+4+***");
++++++++System.out.println("Test+on+CGLIB+decorated+object+with+SPY");
++++++++MySet+spyMs1+=+spy(ms1);
++++++++doThrow(new+NullPointerException("my+test+nullpointer")).when(spyMs1).get();
++++++++spyMs1.set("test+value");
++++++++System.out.println("Set+contains:+"+%2B+spyMs1.get());
++++}

++++public+interface+MySet+{
++++++++void+set(String+val);

++++++++String+get();
++++}

++++public+static+class+MySetImpl+implements+MySet+{
++++++++String+val;

++++++++public+void+set(String+val)+{
++++++++++++this.val+=+val;
++++++++++++System.out.println("Original+SET+call:"+%2B+val);
++++++++}

++++++++public+String+get()+{

++++++++++++System.out.println("Original+GET+call:"+%2B+val);
++++++++++++return+val;
++++++++}

++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|661405|上面的示例生成输出：|unstyled|661406|***+TEST+1+***
Test+on+unmodified+object
Original+SET+call:test+value
Original+GET+call:test+value
Set+contains:+test+value

***+TEST+2+***
Test+decorated+object+with+SPY
Original+SET+call:test+value
NullPointerException+-+as+expected

***+TEST+3+***
Test+on+CGLIB+decorated+object
Original+SET+call:test+value
CGLIB+decorated+GET+call
Original+GET+call:test+value
Set+contains:+test+value

***+TEST+4+***
Test+on+CGLIB+decorated+object+with+SPY
CGLIB+decorated+GET+call
Original+GET+call:test+value
Original+SET+call:test+value
CGLIB+decorated+GET+call
Original+GET+call:test+value
Set+contains:+test+value|661407|现在TEST+2和TEST+4应该在get调用上抛出NullPointerException+-基于mockito+spy：doThrow(new+NullPointerException("my+test+nullpointer")).when(spyMs1).get();|offset|length|style|CODE|661408|“测试4”没有抛出预期的异常，因为它已经被CGLIB装饰了-我们还可以在控制台上看到CGLIb调用正在执行：GLIB+decorated+GET+call，而不是在spy对象上调用。当结合使用Spring+AOP和CGLIB代理时，也可以达到同样的效果。|661409|entityMap^0|0|0|0|2|6|9|6|I|3|Q|K|1Q|24|0|1I|N|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|V|8|@$K|W|L|X|M|N]|$K|Y|L|Z|M|N]|$K|10|L|11|M|N]|$K|12|L|13|M|N]|$K|14|L|15|M|N]]|9|@]|A|$]]|$1|O|3|P|5|F|7|16|8|@$K|17|L|18|M|N]]|9|@]|A|$]]|$1|Q|3|-4|5|F|7|19|8|@]|9|@]|A|$]]]|R|$]]

<pre><code>import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.spy;

import java.lang.reflect.Method;

import org.junit.Test;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class MockitoSpyTest {

 @Test
 public void execTest() {

 System.out.println("*** TEST 1 ***");
 System.out.println("Test on unmodified object");
 MySet ms = new MySetImpl();
 ms.set("test value");
 System.out.println("Set contains: " + ms.get());

 // decorate ms1 with easymock
 System.out.println("\n*** TEST 2 ***");
 MySet spyMs = spy(ms);
 doThrow(new NullPointerException("my test nullpointer")).when(spyMs).get();
 System.out.println("Test decorated object with SPY");
 spyMs.set("test value");
 try {
 System.out.println("Set contains: " + spyMs.get());
 } catch (NullPointerException e) {
 System.out.println("NullPointerException - as expected");
 }

 // Enhance call with CGLIB
 System.out.println("\n*** TEST 3 ***");
 System.out.println("Test on CGLIB decorated object");
 Enhancer enc = new Enhancer();
 enc.setSuperclass(MySetImpl.class);
 enc.setInterfaces(new Class[] { MySet.class });
 enc.setCallback(new MethodInterceptor() {

 @Override
 public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
 if ("get".equals(method.getName())) {
 System.out.println("CGLIB decorated GET call");
 }
 return proxy.invokeSuper(obj, args);
 }
 });
 MySet ms1 = (MySet) enc.create();
 ms1.set("test value");
 System.out.println("Set contains: " + ms1.get());

 // decorate ms1 with easymock
 System.out.println("\n*** TEST 4 ***");
 System.out.println("Test on CGLIB decorated object with SPY");
 MySet spyMs1 = spy(ms1);
 doThrow(new NullPointerException("my test nullpointer")).when(spyMs1).get();
 spyMs1.set("test value");
 System.out.println("Set contains: " + spyMs1.get());
 }

 public interface MySet {
 void set(String val);

 String get();
 }

 public static class MySetImpl implements MySet {
 String val;

 public void set(String val) {
 this.val = val;
 System.out.println("Original SET call:" + val);
 }

 public String get() {

 System.out.println("Original GET call:" + val);
 return val;
 }

 }
}
</code></pre>

Example above produces output:

<pre><code>*** TEST 1 ***
Test on unmodified object
Original SET call:test value
Original GET call:test value
Set contains: test value

*** TEST 2 ***
Test decorated object with SPY
Original SET call:test value
NullPointerException - as expected

*** TEST 3 ***
Test on CGLIB decorated object
Original SET call:test value
CGLIB decorated GET call
Original GET call:test value
Set contains: test value

*** TEST 4 ***
Test on CGLIB decorated object with SPY
CGLIB decorated GET call
Original GET call:test value
Original SET call:test value
CGLIB decorated GET call
Original GET call:test value
Set contains: test value
</code></pre>

Now the <code>TEST 2</code> and <code>TEST 4</code> should throw <code>NullPointerException</code> on <code>get</code> call - based on mockito spy: <code>doThrow(new NullPointerException("my test nullpointer")).when(spyMs1).get();</code>

The "TEST 4" does not throw expected exception because it is already decorated with CGLIB - we can also see on the console that CGLIb call is being executed: <code>GLIB decorated GET call</code> and not call on spy object. The same effect can be achived when using Spring AOP with CGLIB proxies.

Imagine following code:

<pre><code>List list = .....
List spy = spy(list);
doThrow(new NullpointerException()).when(spy).get(0);
</code></pre>

<code>doThrow(....)</code> executes <code>list.get(0)</code> - this makes no sense at all. I would like to define mock behaviour and not to call a method here..... am I missing something?

EDIT:
List is decorated by CGLIB. When I remove CGLIB proxy Mockito works as expected. Any Idea how to solve such problem when using CGLIB proxies?

Mockito - spying on real objects calls original method

想象一下下面的代码：List list = .....List spy = spy(list);doThrow(new NullpointerException()).when(spy).get(0);doThrow(....)执行list.get(0) --这没有任何意义。我想在这里定义模拟行为，而不是调用方法……我...

问Mockito -监视真实对象调用原始方法
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