Anyone got any tips for debugging kotest + depende...

# kotest

[Steve RB]

Anyone got any tips for debugging kotest + dependency issues? I've got an existing project using kotest 4.0.3, but when I add the following line to my build.gradle, non of my tests are getting run (with ./gradlew clean test):
• implementation 'com.github.thake.avro4kavro4k kafka serializer0.2.0'
I'm assuming its pulling in a dep that breaks kotest in some way, but can't figure out what, any advice would be really useful!

[Steve RB]

I can actually see some of the tests starting to run, but they never get allowed to complete and its just outputs:

Test result: SUCCESS
Test summary: 0 tests, 0 succeeded, 0 failed, 0 skipped

[sam]

So simply pulling in that dependency breaks kotest ?

[Steve RB]

yup. 🙂

[Steve RB]

Didn't add any extra code, just the line in the build.gradle file

[sam]

that's bizzare

[sam]

avro4k is one of my libraries as well

[sam]

I've checked both avro4k and the kafka wrapper by thake, and neither of them are doing anything weird with kotlintest deps

[Steve RB]

Oh, yeah - trying to use that with kafka streams and that lib seemed to have a serde serializer i could use

[sam]

I would do a gradle dependency tree, and grep it for both io.kotest and io.kotlintest dependencies and tell me what appears

[sam]

You can also run with an env var, KOTEST_DEBUG=true, and that will spam your logs with details on what kotest is doing. That might be useful

[Steve RB]

Ok, have ran with that debug and here is the before / after. Not sure if that tells you something? https://www.diffchecker.com/VeFifuz4

[sam]

This is really odd

[sam]

Can you try commenting out IntegrationTest and rerunning

[sam]

It's not finding any tests in there, and I wonder if some init exception is breaking.

[Steve RB]

OK, so commenting out that test allowed the other to pass - also there seems to be version mis-match with some of my deps, so i'll explore that too: https://www.diffchecker.com/WY6JgTzg

[sam]

So it seems that something in your integration tests breaks when adding in avro4k

[sam]

BUT kotest shouldn't just ignore all your tests

[sam]

If you can find out what exception is being thrown where, and file a bug report (or ping me) that would be amazing. It might be related to this https://github.com/kotest/kotest/issues/1381

[Mike]

@sam Gradle also has built-in tools to help with Dependencies. Take a look at Dependency Insight. https://docs.gradle.org/current/userguide/viewing_debugging_dependencies.html#example_using_the_dependency_insight_report_for_a_given_dependency

./gradlew dI --dependency kotest --configuration testRuntimeClasspath

dI is short for dependencyInsight as Gradle supports smart aliasing.

dependency seems to be a wildcard search

And configuration would be the one you're interested in. By default, it looks at the main sourceset, so the above looks at the test sourceset.

[sam]

Good to know mike, seems pretty handy

[sam]

The bug is definitely in kotest though, as it's swallowing an exception I think

[Mike]

It's definitely better than producing dependency reports before and after, and doing a file comparison. Very helpful tracking down dependency issues when you have them.

Good luck on your bug quest.

[sam]

Thank you 🙂

[Steve RB]

Ah damn, yup found the exception!

[Steve RB]

I had actually seen it before but thought it was unrelated to this kotest issue!

[Steve RB]

a kafka dependency issue...

[Steve RB]

Caused by: java.lang.NoClassDefFoundError: org/apache/kafka/clients/admin/Admin

[Steve RB]

(java.lang.reflect.InvocationTargetExceptio)

[sam]

And where in the integration test is that being thrown - constructor, a beforeTest block, or .....

[Steve RB]

beforeSpec block

[Steve RB]

of a FunSpec

[sam]

So it's basically the same thing as 1381

[sam]

I'll get a fix out for this next day or two, will be in 4.0.4 and 4.1.0 snapshot

[Steve RB]

Thanks for the help!!!

[Steve RB]

And my build is green - using avro4k + kotest + avro4k-kafka-serializer!

Thanks very much for your debugging advice!

[sam]

You are welcome. Don't forget to star all 3 repos ;)

[Steve RB]

Thats a fair nudge - have done!
So much more enjoyable to use data classes with kafka that the mutable java classes that the gradle-avro-plugin generates!