Which type of Test is usefull for Jenkins Continous Integration (Spring Boot App)

My boss asked me to build some test on our Spring Boot application.

I'm asking myself which type of test should I implement, considering that the goal is to push the app on Jenkins that supports auto Testing.

Code based Test

@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
public class ConfigTagControllerTestReal {

    @Autowired
    MockMvc mockMvc;

    @Test
    public void shouldReturnTheTagName() throws Exception{

        this.mockMvc.perform(get("/configtag/librerie"))
                .andDo(print())
                .andExpect(status().isOk());

    }

Completely Mock Test

@RunWith(SpringRunner.class)
@WebMvcTest(value = ConfigTagController.class , secure = false)
public class ConfigTagControllerTestMocked {

    @Autowired
    private MockMvc mockMvc;

    @MockBean
    private ConfigTagService service;

    @Test
    public void shouldFindTheTagName() throws Exception{

        Collection<String> mockPaths= new ArrayList<>();

        ConfigTagEntity mockTag = new ConfigTagEntity("culo",mockPaths);

        Mockito.when(service.getByName(Mockito.anyString())).thenReturn(mockTag);

        RequestBuilder requestBuilder = MockMvcRequestBuilders.get("/configtag/culo")
                .accept(MediaType.APPLICATION_JSON);

        MvcResult result = mockMvc.perform(requestBuilder).andReturn();

    }

I'm very new in testing and i need to understand the working method