java - 如何使用 EasyMock 模拟测试类中正在实例化的类？

Question

我正在尝试测试一个有点复杂的程序。getDatesMi 调用同一类中的方法。该方法进行调用到一个接口(interface)方法，该方法返回转换为 MarketLimits 类型的查询结果。

我正在使用 EasyMock 和 junit。

我的问题是:

1. 如何测试 getSqlMapClientTemplate().queryForObject ？
2. 如何模拟 getSqlMapClientTemplate().queryForObject 的结果转换为 MarketLimits

我是 java 和 EasyMock 的新手，所以也许答案是显而易见的，但我们将不胜感激。

我目前在 subDates.greaterThenOne() 上收到 NullPointerException

MyServiceDao 接口(interface)

import com.foo.bar.domain.MarketLimits;

public interface MyServiceDao {
    public MarketLimits getDates(long orgId) throws DataAccessException;
}

实现 MyServiceDao 的类

import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;
import com.foo.bar.domain.MarketLimits;


public class myServiceImpl implements MyServiceDao{

    @Override
    public MarketLimits getDates(long orgId) throws DataAccessException {
        return (MarketLimits) getSqlMapClientTemplate().queryForObject("retrieveLimits", orgId);
    }

}

被测主类

import com.foo.bar.dao.MyServiceDao;

public class myServiceImpl extends reports implements myService {

    @Autowired
    private MyServiceDao myServiceDao;


    public String getDatesMi() throws Exception {
        MarketLimits subDates = getDates(23);

        System.out.print(subDates);  // this prints out null

        if(subDates.greaterThenOne()){
            // do some things
        }

        return "result"
    }


    @Override
    public MarketLimits getDates(long orgId) {
        return myServiceDao.getDates(orgId);
    }


    public setMyServiceDao(MyServiceDao myServiceDao){
        this.myServiceDao = myServiceDao
    }

}

我的测试

@RunWith(EasyMockRunner.class)
public class myServiceImplTest {

    @org.easymock.Mock
    private MyServiceDao myServiceDao;

    @TestSubject
    private MyServiceImpl myServiceImpl = new MyServiceImpl();

    @Test
    public void testGetDatesMi() throws Exception {

        MarketLimits limits = new MarketLimits();
        limits.greaterThenOne(true);
        expect(myServiceDao.getDates()).andReturn(limits);
        replay(myServiceDao);

        myServiceImpl.getDatesMi(12);

    }
}

更新 1

由于某种原因，正在创建 EasyMock 实例 myServiceDao，但是当在 EasyMock 实例上调用方法时，它将返回 NULL。我的解决方案是在 myServiceImpl 上创建一个 setter 方法来设置我的 myServiceDao 模拟。这是 Deendayal Garg 的建议

更新2

事实证明我不需要 setter =)我更改了标题以反射(reflect)我面临的真正问题。

Answer 1

好的。为了给出更完整的答案，我尝试了您的代码。类(class)之间存在很多不一致的地方。我尽我所能修复了它们，这是一个有效的示例。正如您将看到的，注入(inject) Dao 不需要 setter。

@RunWith(EasyMockRunner.class)
public class MyServiceImplTest {

    @org.easymock.Mock
    private MyServiceDao myServiceDao;

    @TestSubject
    private MyServiceImpl myServiceImpl = new MyServiceImpl();

    @Test
    public void testGetDatesMi() throws Exception {

        MarketLimits limits = new MarketLimits();
        limits.greaterThenOne(true);
        expect(myServiceDao.getDates(23)).andReturn(limits);
        replay(myServiceDao);

        myServiceImpl.getDatesMi();

        verify(myServiceDao);
    }
}

public class MarketLimits {
    private boolean b;

    public void greaterThenOne(boolean b) {
        this.b = b;
    }

    public boolean greaterThenOne() {
        return b;
    }
}

public interface MyServiceDao {
    MarketLimits getDates(long orgId);
}

public class MyServiceImpl {

    private MyServiceDao myServiceDao;


    public String getDatesMi() throws Exception {
        MarketLimits subDates = getDates(23);

        System.out.print(subDates);  // this prints out null

        if(subDates.greaterThenOne()){
            // do some things
        }

        return "result";
    }

    public MarketLimits getDates(long orgId) {
        return myServiceDao.getDates(orgId);
    }

    public void setMyServiceDao(MyServiceDao myServiceDao){
        this.myServiceDao = myServiceDao;
    }

}