問(wèn)題描述

有時(shí)當(dāng)我編寫(xiě)單元測(cè)試時(shí)，我應(yīng)該模擬對(duì)超類(lèi)的引用.

Sometimes when I write unit tests I should to mock reference to superclass.

我讀過(guò)這個(gè)問(wèn)題:問(wèn)題

此答案answer with DI 建議重構(gòu)代碼.但我做不到

This answer answer with DI advice to refactor code. But I cannot it

如果超類(lèi)方法足夠大，則此答案另一個(gè)答案不適合.就我而言，我有非常大的代碼.是的，我知道它違反了 SOLID OOD 原則，但我應(yīng)該編寫(xiě)測(cè)試.我沒(méi)有足夠的時(shí)間進(jìn)行重構(gòu).

this answer another answer is not suitable if superclass method is enough big. In my case I have very big code. Yes I know that it is brokes SOLID OOD principes but I just should to write test. I have not enough time for refactor.

該問(wèn)題是 4 年前提出的！

said question was asked 4 years ago!

目前 Mockito 或 Powermock 是否可以解決此問(wèn)題?

Does currently Mockito or Powermock can resolve this issue ?

代碼示例:

class BaseService {  
    public void save() {
      // a lot of code here! I cannot change this code.
    }  
}

public Childservice extends BaseService {  
    public void save(){  
        //logic for testing
        super.save();
       //logic for testing
    }  
} 

更新 2

public class Parent {
    public int save() {
         return 99;
    }   
}

public class Child extends Parent {
    public int save() {
        int i = super.save();
        return i*2;
    }
}

和測(cè)試:

@RunWith(PowerMockRunner.class)
@PrepareForTest(Parent.class)
public class ParentTest {
    @Test
    public void testSave() {       
        PowerMockito.suppress(PowerMockito.methodsDeclaredIn(Parent.class));        
        System.out.println(new Child().save());
    }
}

輸出:198

推薦答案

使用 Powermock 您可以替換或抑制方法，因此可以更改 BaseService.save() 完成的操作.您還可以使方法對(duì)抑制不做任何事情.您甚至可以抑制靜態(tài)初始化程序塊.

With Powermock you can replace or suppress methods, so it is possible to change the action done by BaseService.save(). You can also make methods to do nothing with suppressing. You can even suppress static initializer blocks.

請(qǐng)閱讀 Powermock 作者的這篇博文.請(qǐng)參閱更換"一章.

Please read this blog entry of the Powermock authors. See chapter "Replacing".

更新:

抑制似乎對(duì)我有用，但替換不行.見(jiàn)下圖:

Suppress seems to work for me, but replace not. See the picture below:

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