UNIT TEST: queryForObject method not fully covered the lines - spring-boot

Question

I am trying to mock queryForObject method using Mockito. Unit test actually is passed but the lines is not fully covered.
The code to get the people object is like below:
jdbcTemplate.queryForObject(GET_PEOPLE,
(rs, rowNum) -> new People()
.setId(rs.getInt("id"))
.setFirstName(rs.getString("first_name"))
.setLastName(rs.getString("last_name")),
department, position);
FYI: GET_PEOPLE is a static constant contain the SQL query.
and the unit test is:
People people = new People();
people.setId(1);
people.setFirstName("John");
people.setLastName("Doe");
when(jdbcTemplate.queryForObject(any(), (RowMapper<Object>) any(), any())).thenReturn(people);
Can anyone let me know how to mock to get the lines fully covered. Thanks in advance.

Answer 1

You are not getting coverage because you never execute that code.
You need to call your rowmapper:
#ExtendWith(MockitoExtension.class)
public class MyTest {
#Mock
JdbcTemplate jdbcTemplate;
#Mock
ResultSet resultSet;
#Test
public void myTest() throws SQLException {
when(resultSet.getInt(1)).thenReturn(1);
...
when(jdbcTemplate.queryForObject(any(), (RowMapper<People>) any(), any())).thenAnswer(new Answer<People>() {
#Override
public People answer(InvocationOnMock invocationOnMock) throws Throwable {
RowMapper<People> rowMapper = invocationOnMock.getArgument(1);
return rowMapper.mapRow(resultSet, 1);
}
});
...
}
}