Mockito junit springboot

@RunWith(MockitoJUnitRunner.class)
@TestPropertySource("classpath:application-test.properties")
public class DemoTest{
    @InjectMocks
    private Service service;
    @Mock
    private Dao dao;

    @Test
    public void test() {
        when(dao.xxx(any(), any())).thenReturn(new xxx());
        service.xxx();
        asertXXX..
    }