SpringRunner vs SpringBootTest

Question

In unit test, what are the differences between @Runwith(SpringRunner.class) & @SpringBootTest?

Can you explain to me the use cases of

Answer 1

From spring.io :

@RunWith(SpringRunner.class) tells JUnit to run using Spring’s testing support. SpringRunner is the new name for SpringJUnit4ClassRunner, it’s just a bit easier on the eye.

@SpringBootTest is saying “bootstrap with Spring Boot’s support” (e.g. load application.properties and give me all the Spring Boot goodness)

So if you don't need everything that Spring Boot loads for your integration test, you may not need @SpringBootTest