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0

I have a legacy code that not great.
I would like to write a test for it without changing anything in the code.
So I tried to use Powermock, but the mock of extended class keep going to a real class.

How can I test this? Is it even possible without changing the code dramatically?

public class A extends B 

 public static MyObject process(final List<String> myList) 
 List<Integer> myIntList = getSomething(123);
 MyObject obj = new MyObject();

 return obj.get(myIntList);
 


public class B 
 protected static MySource MY_SOURCE = new MySource();

 protected static List<Integer> getSomething(String id) 
 List<Integer> intList = new ArrayList<>();
 intList.add(123);
 return intList
 



@RunWith(PowerMockRunner.class)
@PrepareForTest(B.class)
public class ATest 

 @InjectMocks
 private A aClass;

 @Before
 public void setUp() 
 initMocks(this);

 PowerMockito.when(B.class, "getSomething", "123").thenReturn(Collections.EMPTY_LIST());
 

 @Test
 public void testProcess() 
 List<String> inputList = new ArrayList<>();
 inputList.add("mylist1");
 MyObject result = aClass.process(inputList);

 assertNotNull(result);
 

junit java-8 powermock powermockito

share|improve this question

asked Mar 7 at 2:51

user293655user293655

51110

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Your sample does not compile and is incomplete (what is MyObject and what does obj.get(myIntList) do?!) but from the looks of it you need to remove the aClass field, the initMocks(this) call and add a PowerMockito.mockStatic(B.class); before the PowerMockito.when(B.class.... call. If you can provide a correct sample I can double-check, but without it I can only guess/assume...
  
  – Morfic
  Mar 8 at 15:32
  
  

  
  
  
  

add a comment | 

0

I have a legacy code that not great.
I would like to write a test for it without changing anything in the code.
So I tried to use Powermock, but the mock of extended class keep going to a real class.

How can I test this? Is it even possible without changing the code dramatically?

public class A extends B 

 public static MyObject process(final List<String> myList) 
 List<Integer> myIntList = getSomething(123);
 MyObject obj = new MyObject();

 return obj.get(myIntList);
 


public class B 
 protected static MySource MY_SOURCE = new MySource();

 protected static List<Integer> getSomething(String id) 
 List<Integer> intList = new ArrayList<>();
 intList.add(123);
 return intList
 



@RunWith(PowerMockRunner.class)
@PrepareForTest(B.class)
public class ATest 

 @InjectMocks
 private A aClass;

 @Before
 public void setUp() 
 initMocks(this);

 PowerMockito.when(B.class, "getSomething", "123").thenReturn(Collections.EMPTY_LIST());
 

 @Test
 public void testProcess() 
 List<String> inputList = new ArrayList<>();
 inputList.add("mylist1");
 MyObject result = aClass.process(inputList);

 assertNotNull(result);
 

junit java-8 powermock powermockito

share|improve this question

asked Mar 7 at 2:51

user293655user293655

51110

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Your sample does not compile and is incomplete (what is MyObject and what does obj.get(myIntList) do?!) but from the looks of it you need to remove the aClass field, the initMocks(this) call and add a PowerMockito.mockStatic(B.class); before the PowerMockito.when(B.class.... call. If you can provide a correct sample I can double-check, but without it I can only guess/assume...
  
  – Morfic
  Mar 8 at 15:32
  
  

  
  
  
  

add a comment | 

I have a legacy code that not great.
I would like to write a test for it without changing anything in the code.
So I tried to use Powermock, but the mock of extended class keep going to a real class.

How can I test this? Is it even possible without changing the code dramatically?

public class A extends B 

 public static MyObject process(final List<String> myList) 
 List<Integer> myIntList = getSomething(123);
 MyObject obj = new MyObject();

 return obj.get(myIntList);
 


public class B 
 protected static MySource MY_SOURCE = new MySource();

 protected static List<Integer> getSomething(String id) 
 List<Integer> intList = new ArrayList<>();
 intList.add(123);
 return intList
 



@RunWith(PowerMockRunner.class)
@PrepareForTest(B.class)
public class ATest 

 @InjectMocks
 private A aClass;

 @Before
 public void setUp() 
 initMocks(this);

 PowerMockito.when(B.class, "getSomething", "123").thenReturn(Collections.EMPTY_LIST());
 

 @Test
 public void testProcess() 
 List<String> inputList = new ArrayList<>();
 inputList.add("mylist1");
 MyObject result = aClass.process(inputList);

 assertNotNull(result);
 

junit java-8 powermock powermockito

share|improve this question

asked Mar 7 at 2:51

user293655user293655

51110

public class A extends B 

 public static MyObject process(final List<String> myList) 
 List<Integer> myIntList = getSomething(123);
 MyObject obj = new MyObject();

 return obj.get(myIntList);
 


public class B 
 protected static MySource MY_SOURCE = new MySource();

 protected static List<Integer> getSomething(String id) 
 List<Integer> intList = new ArrayList<>();
 intList.add(123);
 return intList
 



@RunWith(PowerMockRunner.class)
@PrepareForTest(B.class)
public class ATest 

 @InjectMocks
 private A aClass;

 @Before
 public void setUp() 
 initMocks(this);

 PowerMockito.when(B.class, "getSomething", "123").thenReturn(Collections.EMPTY_LIST());
 

 @Test
 public void testProcess() 
 List<String> inputList = new ArrayList<>();
 inputList.add("mylist1");
 MyObject result = aClass.process(inputList);

 assertNotNull(result);
 

share|improve this question

asked Mar 7 at 2:51

user293655user293655

51110

share|improve this question

asked Mar 7 at 2:51

user293655user293655

51110

asked Mar 7 at 2:51

user293655user293655

51110

asked Mar 7 at 2:51

user293655user293655

51110