無法使用PowerMockito部分模擬靜態方法

Question

我將在Util類中模擬名爲toBeMockedFunction的靜態函數。該方法從調用到BeUnitTested這是一個公共靜態無效方法。我想要讓BeMockedFunction不做任何事情。我嘗試了很多方法（片段貼出這樣的2個）部分模擬和存根並且無法成功。

請建議我做錯了什麼。

public class Util { 
    // Some code 
    public static void toBeUnitTested(CustomObject cb, CustomObject1 cb1, List<CustomObject2> rows, boolean delete) { 
     // some code 

     toBeMockedFunction(cb, "test", "test"); 
    } 

    public static CustomObject toBeMockedFunction(CustomObject cb, String str1) { 
     // some code 
    } 

} 

而下面是我JUnit類

@RunWith(PowerMockRunner.class) 
@PrepareForTest({ Util.class}) 
public class UtilTest { 
    @Test 
    public void Test1() { 
     PowerMockito.spy(Util.class);    

//mock toBeMocked function and make it do nothing 
PowerMockito.when(PowerMockito.spy(Util.toBeMockedFunction((CustomObject)Mockito.anyObject(), Mockito.anyString()))).thenReturn(null); 

     Util.toBeUnitTested(cb, "test", "test"); 
    } 
    } 

Approach2

PowerMockito.mockStatic(Util.class); 
    PowerMockito.when(Util.toBeUnitTested((CustomObject)Mockito.anyObject(),Mockito.anyString())).thenCallRealMethod(); 
    Util.toBeUnitTested(cb, "test", "test"); 

Answer 1

這是如何能做到這一點的例子：

@RunWith(PowerMockRunner.class) 
@PrepareForTest({ Util.class}) 
public class UtilTest { 
    @Test 
    public void Test1() { 

     PowerMockito.spy(Util.class); 
     PowerMockito.doReturn(null).when(Util.class, "toBeMockedFunction", Mockito.any(CustomObject.class), Mockito.anyString(), Mockito.anyString()); 

     List<CustomObject2> customObject2List = new ArrayList<>(); 
     customObject2List.add(new CustomObject2()); 

     Util.toBeUnitTested(new CustomObject(), new CustomObject1(), customObject2List, true); 
    } 
} 

請注意，OP的代碼不能編譯。方法toBeMockedFunction(CustomObject cb, String str1)只收到2個參數，並且您使用3：toBeMockedFunction(cb, "test", "test");進行呼叫。如您所見，我已將最後一個添加到方法簽名中。

希望它有幫助