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

@RunWith is an old annotation from JUnit 4 to use test runners. If you're using JUnit 5 (Jupiter), you should use @ExtendWith to use JUnit extensions

See https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-testing

"If you are using JUnit 4, don’t forget to also add @RunWith(SpringRunner.class) to your test, otherwise the annotations will be ignored. If you are using JUnit 5, there’s no need to add the equivalent @ExtendWith(SpringExtension.class) as @SpringBootTest and the other @…Test annotations are already annotated with it.