Hey guys :wave: Does anyone know if it’s possible to have kotest and junit5 tests coexist? I have a ...

# kotest

[Krystian Rybarczyk]

Hey guys 👋
Does anyone know if it’s possible to have kotest and junit5 tests coexist? I have a project with kotest setup and I wanted to give junit5 a go in Kotlin, but when I added

testImplementation(platform("org.junit:junit-bom:5.7.0"))
    testImplementation("org.junit.jupiter:junit-jupiter")

tests are not picked up by Gradle. Do Jupiter and Kotest not like one another?

[sam]

you should be able to use both together

[sam]

as long as jupiter is on the classpath, you might have to do the include engine configuration that gradle provides

[Krystian Rybarczyk]

thanks so much for confirming this @sam I’ve had a close look at my tests and I missed the fact that suspend tests are not run by junit and I have to wrap them in runBlocking (which is not ideal…). Thanks anyway! 🙂

[sam]

Ah ok. Let me know how you think junit compares to kotest for kotlin tests.

[Krystian Rybarczyk]

sure, will do! 🙂 Overall I think kotest is a great testing framework, thanks a lot for all the effort writing and maintaining it @sam My biggest complaint and the reason why I want to take a look at JUnit is the incredibly slow performance while editing although I do realise that this is probably an issue on the IntelliJ side. I’m in the process of filing a bug and still need to profile CPU usage, but editing a large test suite (over 200 lines of code) is an incredibly annoying experience on a 2020 MacBook Pro 2,3 GHz i7…

[sam]

It's intellij and generics

[sam]

It's also miles faster on 1.4.20

[sam]

And you can use annotation spec which is junit by another name

[Krystian Rybarczyk]

Oh, I’ve not thought about annotation spec, good call, thanks! Will definitely take a look! And will also check out 1.4.20, I’m still on 1.4.10

[sam]

I was surprised at how much faster it is - you don't need to upgrade your project, it's the 1.4.20 intellij plugin that is faster.

[Krystian Rybarczyk]

strange.. I can’t see this update yet in 2019.3 🤔 maybe I need to switch to 2020.3…

[Krystian Rybarczyk]

I’ve just remembered what I miss in kotest (again: probably IntelliJ’s thing): not being able to run test suites from IDE:

[Krystian Rybarczyk]

( ▶️ icon disappears as soon as I extend AnnotationSpec)

[sam]

do you have the kotest plugin ?

[Krystian Rybarczyk]

🤦‍♂️ no, I don’t. Oh man, you’ve literally made me a happy Kotlin developer again 😄 I just need to take 1.4.20 for a ride 🙂

[Krystian Rybarczyk]

wow, you’re right @sam 1.4.20 is unimaginably faster. Who would have thought? 😉 Thanks again for all the insights, I’ll happily stick to Kotest 🎉 😄

[sam]

I was super impressed when I tried the 1.4.20 rc, because I was like, what, how is this so much faster

[sam]

It was never a kotest thing, it was a problem with too many lambdas / type parameters. So things like arrow would grind to a halt as well.

[Krystian Rybarczyk]

I’ve only noticed massive slow down with Kotest, as I’ve not used arrow equally heavily 😅