问题
My team and I have been working on a bunch of microservices using Spring boot. Since the services went through JUnit and Spring Boot upgrades (We're using now Spring Boot 2 and JUnit 5), different JUnit implemented by different devs, are now using different patterns with:
- @ExtendWith
- @RunWith
Today what's the difference between the two of them and do we really need them for our Unit Tests or are embedded in some new Spring Boot annotation?
回答1:
If you are using Junit version < 5, so you have to use @RunWith(SpringRunner.class) or @RunWith(MockitoJUnitRunner.class) etc.
If you are using Junit version = 5, so you have to use @ExtendWith(SpringExtension.class) or @ExtendWith(MockitoExtension.class) etc.
- SpringRunner
- MockitoJUnitRunner
- SpringExtension
- MockitoExtension
回答2:
The answer can be found in the documentation:
If you are using JUnit 4, don’t forget to 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) as @SpringBootTest and the other @…Testannotations are already annotated with it
.
回答3:
@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.
来源：https://stackoverflow.com/questions/55276555/when-to-use-runwith-and-when-extendwith