EasyMock的anyObject使用时候的问题
原因是： EasyMock的anyObject虽然是个模版方法，但是返回了一个null，这个在java自动类型转换的时候就回报异常。

public static <T> T anyObject(final Class<T> clazz) {        reportMatcher(Any.ANY);        return null;    }

关于这个问题，我已经给EasyMock报了bug了，bug链接地址：
https://jira.codehaus.org/browse/EASYMOCK-114

下面是复现代码：

import java.util.List;public interface IService {List<String> query(String key, int... startAndPerPages);}

import java.util.List;import java.util.Collections;public class ServiceImpl implements IService{@SuppressWarnings("unchecked")public List<String> query(String key, int... startAndPerPages) {return Collections.EMPTY_LIST;}}

import java.util.List;public class ClientService {private IService depenService;public List<String> query(String key, int... startAndPerPages) {List<String> rets = depenService.query(key, startAndPerPages);rets.add("aaaa");return rets;}public void setDepenService(IService depenService) {this.depenService = depenService;}}

import java.util.ArrayList;import java.util.List;import org.easymock.EasyMock;import org.junit.Before;import org.junit.Test;public class ClientServiceTest {@Testpublic void query_page_error(){    ClientService clientService = new ClientService();IService mockService = EasyMock.createMock(IService.class);EasyMock.expect(mockService.query(EasyMock.anyObject(String.class),EasyMock.anyObject(Integer.class),EasyMock.anyObject(Integer.class)));EasyMock.replay(mockService);clientService.setDepenService(mockService);String key = "test";int startPage = 1;int recordsPerPage = 10;clientService.query(key, startPage,recordsPerPage);EasyMock.verify(mockService);}@Testpublic void query_page_correct(){ClientService clientService = new ClientService(); List<String> rets = new ArrayList<String>();IService mockService = EasyMock.createMock(IService.class);EasyMock.expect(mockService.query(EasyMock.anyObject(String.class),EasyMock.anyInt(),EasyMock.anyInt())).andReturn(rets);EasyMock.replay(mockService);clientService.setDepenService(mockService);String key = "test";int startPage = 1;int recordsPerPage = 10;clientService.query(key, startPage,recordsPerPage);EasyMock.verify(mockService);}}

错误现象，第一个报NullPointException，

java.lang.NullPointerExceptionat ClientServiceTest.query_page_error(ClientServiceTest.java:17)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)at org.junit.runners.ParentRunner.run(ParentRunner.java:236)at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)