How to test void method

Question

How do I test void method?

@Override
    public void insertUserDetails(String userData) throws JSONException {
        Map<String, Object> userDataMap = jsonUtil.convertJsonToMap(userData);
        dao.insertUserDetails(userDataMap);
    }

I have tried with many methods but i didn't get solution.

Possible duplicate of [How to make mock to void methods with mockito](https://stackoverflow.com/questions/2276271/how-to-make-mock-to-void-methods-with-mockito) — Stalemate Of Tuning, Feb 05 '19 at 16:53

score 1 · Answer 1 · answered Feb 05 '19 at 13:21

You can cover your lines with Mockito.

Example:

@Mock
private Dao dao;

@Test
public void insertUserDetails() {

    when(jsonUtil.convertJsonToMap(any(UserData.class)).thenReturn(...);

    obj.insertUserDetails(...);

    verify(dao, times(1)).insertUserDetails(expected);
}

score -1 · Accepted Answer · answered Feb 14 '19 at 11:58

-1

@Test
    public void insertUserDetailsTest() throws JSONException{
        String userdata = "{\"name\":\"test1\",\"dept\":\"test1\",\"id\":1}";
        Mockito.doNothing().when(mdmdao).insertUserDetails(Mockito.anyMap());
        mdmserviceimpl.insertUserDetails(userdata);
        Mockito.verify(mdmdao,times(1)).insertUserDetails(Mockito.anyMap());
    }

answered Feb 14 '19 at 11:58

devillllllll

1
2

What is the different beetveen this and the previous solution? – zappee Mar 23 '19 at 08:50
The solution u have provided contains thenreturn(...) but void methods actually do not return any values.so i have used doNothing(....). – devillllllll Mar 25 '19 at 07:13

How to test void method

2 Answers2