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……我是不是遗漏了什么?
编辑:列表由CGLIB装饰。当我删除CGLIB代理时,Mockito可以正常工作。你知道如何在使用CGLIB代理时解决这样的问题吗?
发布于 2012-02-09 00:28:13
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;
}
}
}
上面的示例生成输出:
*** 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
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();
“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。
发布于 2012-02-08 11:16:31
Mockito.doThrow(new NullpointerException()).when(spy).get(0);
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:
@PrepareForTest(List.class)
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。
https://stackoverflow.com/questions/9110125
复制相似问题