Exactly what makes it possible in kotlin to write ...

# spring

[Pihentagy]

Exactly what makes it possible in kotlin to write a Test with @Autowired val parameters?
So one can write this

class MyRepositoryTests(@Autowired val entityManager: TestEntityManager, @Autowired val repository: UserRepository)

while in java you should have an Autowired field (seen at https://docs.spring.io/spring-boot/reference/testing/spring-boot-applications.html#testing.spring-boot-applications.autoconfigured-spring-data-jpa)

[Daniel Pitts]

Spring is smart enough to wire up the constructor arguments. Works in Java as well.

[Szymon Jeziorski]

you can even configure spring to autowire fields to the test class constructor by default, letting you omit @Autowired, the same way as you can in the main source sets:

furthermore, you can set that globally for your tests by setting junit config parameter:
https://docs.spring.io/spring-framework/reference/languages/kotlin/spring-projects-in.html#constructor-injection