It's a two-fold question.
- What is the difference between
junit-vintage-engineandjunit-jupiter-engine? - SpringBoot starter projects come with an exclusion for
junit-vintage-engine. Is it to enforce the use of junit-jupiter-engine?
Below is the dependency of my SpringBoot project generated from Spring Initializr:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
3 Answers
junit-vintage-engine is used for running JUnit 4 tests; junit-jupiter-engine for JUnit 5 tests.
Presumably since you'll be writing only JUnit 5 tests for a new Spring Boot project, the vintage engine won't be needed, hence the default dependency exclusion in the POM.
Reference:
Answer : 1. Based on reading i found some difference like,
junit-vintage-engine :
- Used in Junit-4 Testing.
- Used to call core classes and annotations.
- 'Assert' which provide assertion methods for performing test.
- 'Assume' used to place assumptions.
- Use annotation like, @Ignore, @Before, etc...
junit-jupiter-engine :
- Used in Junit-5 Testing
- Provide some API which helpful to write test cases.
- 'Assertions' provides utility methods of assertion condition for testing.
- 'Assumptions' - utility method provide condition based on assumption.
- Change the bit of annotation name like, @Disable, @BeforeAll, @BeforeEach, etc...
Answer : 2. I'm also amazed they are still providing older vintage library probably there is some reason which i don't know till now but based on current usage we'll see that in next update.
Have a nice day!!! :)
First question is also related with the version of JDK. To be able to use jupiter engine, you must have Java 8 or higher. For second question; since the vintage engine is for JUnit4 and JUnit4 is greater than 10 years old, it is not recommended to be used. As far as I know, it has not been updated along this time although java has been evolved so much. I think that is why spring initializers enforce the use of junit-jupiter-engine.
