I am attempting to revive using Jacoco in a Kotlin multiplat

Question

I am attempting to revive using Jacoco in a Kotlin multiplatform project It is worse than pulling teeth given that 1 there is no Java or Application plugin in use that defines jacocoTestReport 2 I am using Kotlin DSL so creating the task jacocoTestReport is non trivial for me anyway 3 I am using Kotlin test not Junit which I m guessing does not support Jacoco and 4 the GooglePlex Stack Overflow Medium etc all are coming up empty for a simple example that illustrates what needs to be done I would not be surprised at all to learn that it is even more complicated In any case a link to a project that has worked around the constraints I described would be much appreciated Additional insight will also likely be invaluable

pajatopmr · Answer

Please post responses to this thread Thanks

gildor · Answer

2 What do you mean Could you share some sample

gildor · Answer

Just to be clear do you try to configure it for JVM part of your MPP project right

pajatopmr · Answer

I did not do anything specific to configure Jacoco for the JVM only part right now other than common

pajatopmr · Answer

This example taken from an old Groovy script I found was my starting point `task jacocoJVMTestReport type JacocoReport dependsOn = test group = Reporting description = Generate Jacoco coverage report classDirectories = fileTree dir $buildDir classes kotlin jvm main def coverageSourceDirs = src commonMain kotlin src jvmMain kotlin additionalSourceDirs = files coverageSourceDirs sourceDirectories = files coverageSourceDirs executionData = files $buildDir jacoco jvmTest exec reports html enabled = true xml enabled = true csv enabled = false `

pajatopmr · Answer

Mapping that to use Kotlin DSL and a multiplatform project has been difficult to say the least But I am still at it while trying to find a version already converted and using MPP

pajatopmr · Answer

< gildor> do you have any insight into 3

gildor · Answer

Why do you convert it to Kotlin DSL if you not familiar with it You can continue to use groovy even move it to groovy script

gildor · Answer

I did some super fast test using kmath project and it works for me

gildor · Answer

But it uses standard kotlin `org jebrains kotlin test` and `org jebrains kotlin test junit`

gildor · Answer

and this task above works for me

gildor · Answer

if you have some sampe project that uses kotlin test please share I never used it maybe it really has some problems but as I understand how Jacoco works it shouldn t be related

gildor · Answer

I pushed sample here <https github com gildor kmath blob jacoco test kmath core build gradle kts>

gildor · Answer

Also check that you applied `jacoco` plugin without it code instrumentation will not be applied so you cannot get reports

gildor · Answer

But again this sample uses `org jebrains kotlin test` + `org jebrains kotlin test junit` but most probably it will work with kotlintest

LeoColman · Answer

I use Kotlintest and Jacoco and they work correctly I didn t try it with MPP however

LeoColman · Answer

I don t think jacoco depends on how it s being executed but KT uses JUnit to execute tests

pajatopmr · Answer

< LeoColman> do you have a public repo where I can look at your build script

pajatopmr · Answer

< gildor> your kmath core directory is helpful However jvmTest is unresolved in my build gradle kts when I copy the tasks block from your kmath core project This makes no sense to me Here s my build script

gildor · Answer

< pajatopmr> Maybe you just share some sample that doesn t work for you because JVM only and MPP configs are pretty differnt not sure how this would help you especially if kotlintest uses Junit 5

gildor · Answer

gt However jvmTest is unresolved in my build gradle kts Because I use type safe accessors which available because I have custom plugin with basic config Just use dynamic syntax ```named jvmTest finalizeBy coverage ```

gildor · Answer

< pajatopmr> Your config will not work because you didn t apply `jacoco` plugin

gildor · Answer

Also to configure finalizeBy you can do the same syntax as on line 68 `named` just does this lazy

pajatopmr · Answer

Hmmm I thought that apply happened automagically via using the plugins block

gildor · Answer

I don t see jacoco plugin in your plugins block

pajatopmr · Answer

My bad I took it out and did not put it back disappointed

pajatopmr · Answer

Can you elaborate on fixing finalizeBy

gildor · Answer

replace ``` jvmTest finalizedBy coverage ``` With ``` named jvmTest finalizeBy coverage ```

gildor · Answer

you don t need this line if you don t want to run coverage each time after test run

pajatopmr · Answer

That I did but now finalizedBy is not resolved

pajatopmr · Answer

got it now

gildor · Answer

there is just a typo `finalizeBy` gt `finalizedBy`

gildor · Answer

but as I said it the same what you do in line 68 just using eager syntax ```tasks get name = jvmTest dependsOn += tasks get name = copyTestResources ```

gildor · Answer

you can combine those 2 configs

gildor · Answer

named jvmTest dependsOn named copyTestResources finalizedBy coverage

pajatopmr · Answer

And now I get coverage Awesome Thanks for the help

mben · Answer

Hello i m interested about this topic since i m trying to also launch some test coverage for my commonTest module but couldn t get your solution to work since i m having Task with name jvmTest not found in project

LeoColman · Answer

I think jvmTest must be inside a `kotlin` block isn t it

mben · Answer

Nope my kotlin block looks like this

mben · Answer

so i have no clue on how to make it work

gildor · Answer

Of course you don t have jvmTest because you don t have jvm as target platform instead you have Android test tasks

mben · Answer

i m not that good on gradle configuration and neither test coverage so if you could enlighten me i would be thankful

mben · Answer

my all build gradle look like this it work well i can generate and use framework with cocoapods plugin and all my tests are inside a commonTest folder and now i wanted to try test coverage with jacoco that i never used before

gildor · Answer

Do you understand that jacoco is JVM only tool There is also experimental K N coverage tool

mben · Answer

you are talking about this one <https github com JetBrains kotlin native blob master CODE COVERAGE md>

LeoColman · Answer

nothing for MPP yet I suppose

gildor · Answer

Yes this is coverage tool for K N