My first attempt at using code coverage in a multiplatform library is up at https://github.com/pajato/ArgusCoreKML . Critiques and questions will be appreciated.

btw, if anyone else is interested in collaborating on a solution to this problem, either DM me or start a thread.

This is important and timely: https://kotlinlang.slack.com/archives/C0BJ0GTE2/p1548681883151800

Hi @Anthony f, it seems that when i use Intellij code coverage, it only works for one class at a time. If i try running all test classes at once, i will get 0% coverage everywhere

Having a coverage question with respect to using the

?:

elvis operator to provide a default: If I have code that does something like:

val x = nullableObject?.method() ?: default

JaCoCo tells me I have one of 4 branches uncovered. If I change that to:

val nullableX = nullableObject?.method()
    val x = nullableX ?: default

JaCoCo tells me all branches are covered (2 branches per line). I'm guessing the "uncovered" branch is when

nullableObject

is non-null, but

method()

returns null -- is there a way to get JaCoCo to realize that branch is not possible based on

method()

not being nullable? Or is there a better practice here?

Can anyone share their configuration of jacoco (or any other tool) for Android project coverage reporting? What to look out for? I've seen some work being done for Kotlin support but not sure if it's worth investing time in (https://www.jacoco.org/jacoco/trunk/doc/changes.html)

anyone now about 991 development lifecycle?

90% -> ci / build success rate
90% -> code coverage
under 10mins -> execution time

I came accross it, when attending a local meetup, but I’m forgot to get the presentation slide, and after a while researching the web, the result seems not relevant.

Hey everyone, I’m having some hard time finding out at what point I should create the code coverage reports (probably with JaCoco), considering I’m using Github for version control, Sonarcloud for code analysis and Jenkins for CI, I’m not sure how to put those building blocks together

Hi everyone, I’m currently doing research on which Code Coverage tool to use in a Kotlin Multiplatform Project (Android + iOS) to generate a Code Coverage report, but I don’t seem to find anything besides Jacoco, which would only work for the JVM. I want to be able to have the coverage for commonMain, androidMain and iosMain. Do you have any suggestion on how I could achieve that? Thank you!

Ok folks. I've finally had enough. The code coverage situation in general is deplorable, for Kotlin it is even worse and for KMP worse still. So I am going to bite the bullet and take a few months to, hopefully, kickstart a new code coverage tool, an open source project that treats KMP as a first class citizen and any language that has a Language Server Protocol implementation reasonably well. The tool be source based (use a source-source transformation) thus eliminating the myriad problems caused by code generation tools with Jacoco and other current object based instances. Jetpack Compose doesn't stand a prayer with Jacoco based on my early experiences instrumenting the JetNews sample app. For now, I will call this tool CCT (names are not my forte). I will be asking lots of questions in this channel about Kotlin of course. If you have opinions, comments, observations, questions ... the thread awaits them.

I recently generated a Jacoco (0.8.5) code coverage report for the Jetpack Compose sample app, JetNews, and

lateinit

was marked in yellow. Hovering revealed both cases were missed. I seem to recall not seeing this behavior in less experimental code. Two questions: 1) is Jacoco doing the right thing for your uses of

lateinit

statements? 2) should the code coverage tool even care about

lateinit

? I think not because it is the accesses that are relevant and important to execute. Note that code coverage is not the right tool to ensure that using un-initialized variables are caught. That state can happen at runtime and be missed by a 100% code coverage run. Therefore knowing that no test tripped an un-initialised execution is not helpful.

Does anyone have a guide for how to enable code coverage, either from jacoco or IntelliJ, for a Kotlin Multiplatform project? I seem to only find conflicting/out of date resources and I’m really struggling here.

Anyone experienced

java.lang.IllegalStateException: Unexpected SMAP line: *S KotlinDebug

when generating Jacoco coverage reports with Kotlin 1.5.0?

Anyone else lost code coverage highlighting in IntelliJ after upgrading to Kotlin 1.5.10 (from 1.4.21)? I opened an issue, but will close it if I just did something dumb: https://youtrack.jetbrains.com/issue/KT-47057

Hey People - I just read the Program of Kotlin 2021 Premier Online Event. However I stumbled over Kover. Since I currently develop a Coverage Plugin for Multiplatform (currently it's working for Android and JVM and iOS is on it's way)...I am of course super curious about, which cases Kover will cover and if I can spare my time and move on to another topic. Can anybody leak some information in this regard?

Hello everyone. People in this group might know the answer to this simple question. I’m looking for some good CASE tools or software architecture tools that convert system diagrams into Kotlin code. Does anyone have any recommendations?

Hello, I’m trying to use Kover in my project, but when I use

./gradlew koverHtmlReport

runs the test for all the variants, how can I run Kover just for my tests in develop variant?

anyone is using kover + sonarqube?

Hi, I’m trying to use

kover

for my android project. For regular jUnit tests it works fine but I don’t see any results for tests run via

./gradlew connectedAndroidTest

Is that supported? Is it necessary to configure it somehow?

I'm using kotlinx-kover for code coverage in a project. I am using interfaces to maximize code reuse. I'm seeing something strange in one of my projects. I have the following interfaces that add convenient members (LogicGate is another interface)

interface SingleOutput: LogicGate {
    val output: Pin
        get() = outputs.first()
}
interface SingleInput: LogicGate {
    var input
        get() = inputs.first()
        set(value) { inputs[0] = value }
}

I generally implement Input first, then Output, but when I do that, kover shows that the line that says

interface SingleOutput: LogicGate

is not run. I had to switch the order of imports for one of my classes in order for the line to show as Green in kover's report. Is this expected, or a bug in kover?

Has anybody managed to get Jacoco working on gradle 7? I keep getting failures when I run the jacocoTestReport task but it doesn't really tell me what? I'm trying to use it with Sonarqube for my JenkinsFile which will build it on Jenkins. Worked on our old non gradle 7 project but I'm not sure what the problem here is. Is there any examples of it with a KMM project for android/ios that anyboy knows of? Just reading here and sounds like Kover could be a good use case?

What is the latest preferred way of dealing with JaCoCo and

@Serializable

classes? I see several StackOverflow questions and answers that are 3+ years old, and there is a still outstanding issue 961. Has anyone solved the problem satisfactorily?

Wherever I call bufferedWriter(), JaCoCo complains that one of two branches is missed. I presume this is because it's an inline function that calls

writer().buffered()

which are both also inline, and the call boils down to something similar to this:

val x = OutputStreamWriter(this)
return if (x is BufferedWriter) x else BufferedWriter(x)

Now we know that the

if

true branch will never be called in this case, so there is nothing we can do in our own code to test this branch. Is there a way to silence JaCoCo from outputing this false positive?

Isn't Kover supposed to handle these Kotlin edge-cases that Jacoco couldn't? Not sure why it thinks the object line needs testing when I accessed a constant in the object...

📣 Hi everyone! Please share what you think about the Kover code coverage tool by taking this short 10-question survey. 🎁 3 lucky survey respondents will win prizes! 🙂

I am using Kover with INTELLIJ agent. Does anyone know how to feed the xml report to Sonarqube? (similar to

sonar.coverage.jacoco.xmlReportPaths

) ?

Can Kover be applied to Android Connected/Instrumented UI tests?

Hi team!! Can you help me! Im using Kover and for some reason the Companion Object its not covered, some idea of how do it ??

Hey guys, I am getting weird issue when running on my unit test. I have this function

internal fun getPendingStatusAction(
status: XYZ
): (() -> Unit)? {
    var action: (() -> Unit)? = null
    this.yo = yo
    if (isAwaitingIdVerification(status)) {
        action = {
            <http://router.xyz|router.xyz>()
        }
    } else if (status == XYZ.PURCHASE) {
        action = {
            <http://router.xyz|router.xyz>()
        }
    }
    return action
}

When I run single unit test it complete fine, but when I run whole file unit test it failed.