Difference between junit-vintage-engine and junit-jupiter-engine?

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.

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.