i usually use `@Autowired lateinit var dependency: Dependency`

# spring

[leodeng]

i usually use @Autowired lateinit var dependency: Dependency

[Michael]

Super, thank you. I think I tried lateinit with val, and that didn’t work obviously; I wasn’t thinking it through properly.

[soudmaijer]

Be aware that the var dependency: Dependency is mutable. I would also consider looking at constructor injection where you can make the property a val again.

[Michael]

I always use constructor injection in my application classes; but that doesn’t seem to work in a junit test class.

[soudmaijer]

why not? I tend to always use it, have not had issues with JUnit tests.

[Michael]

interesting. It’s actually the SpringJUnit class runner: java.lang.Exception: Test class should have exactly one public zero-argument constructor

[soudmaijer]

ah, you are injecting in a test class... I overlooked that part

[soudmaijer]

my bad 😉

[Michael]

oh sorry, yeah. Trying to inject my repositories for an integration test to test the state afterwords.

[soudmaijer]

For a test I wouldnt be that bothered 🙂 Currently its a limitation of junit4 which will be/is fixed with junit5, https://junit.org/junit5/docs/current/user-guide/#writing-tests-dependency-injection

[Michael]

woohoo! Honestly, I haven’t even looked a little at junit 5 yet - I’m hoping I survive java 9. 😉

[deviant]

meanwhile java 10 is coming 🙂