Using kotest this test fails on JavaScript with Kotlin 1 9 2

Question

Using kotest this test fails on JavaScript with Kotlin 1 9 20 with a `TypeError` but note if `mapOf` is changed to `listOf` it works Also note if I use `kotlin test` instead of kotest the test passes as well This is clearly a bug somewhere but I m trying to figure out whether its a kotlin js bug or whether its a kotest bug Thoughts More details in thread Here is a repo to play with locally <https github com rocketraman test kt duration in map> ```class DurationKoTest FunSpec test Duration in map val tests = mapOf 15 seconds to 0L tests forEach input output > input toLong DurationUnit DAYS shouldBe output ```

rocketraman · Answer

Incidentally it fails with the k2 compiler as well in exactly the same way

rocketraman · Answer

And here is the error ```TypeError get rawValue 5zfu4e shr 9fl3wl k$ is not a function at lt global gt get value a43j40 home raman source test kt duration in map compileSync js test testDevelopmentExecutable kotlin src kotlin time Duration kt 37 at lt global gt Duration toLong impl shr43i home raman source test kt duration in map compileSync js test testDevelopmentExecutable kotlin src kotlin time Duration kt 789 at protoOf doResume 5yljmg home raman source test kt duration in map src commonTest kotlin DurationKotest kt 13 at protoOf invoke s5vbtx test kt duration in map test 934710764 js 71230 at slambda $test test kt duration in map test 934710764 js 71272 at protoOf doResume 5yljmg runner work kotest kotest kotest framework kotest framework api src commonMain kotlin io kotest core spec style scopes RootScope kt 36 at protoOf invoke s5vbtx test kt duration in map test 934710764 js 10912 at lt global gt l test kt duration in map test 934710764 js 10959 at protoOf doResume 5yljmg runner work kotest kotest kotest framework kotest framework engine src commonMain kotlin io kotest engine test TestCaseExecutor kt 91 at protoOf invoke peurmw test kt duration in map test 934710764 js 28107 ```

Casey Brooks · Answer

It also seems to work fine when run in the Playground <https pl kotl in aSU4yVRrM> Also it seems like the test break when the `Map Entry` is destructured but works fine if you access the key value properties normally ``` this works tests forEach val input = it key val output = it value input toLong DurationUnit DAYS shouldBe output this fails with the same error tests forEach val input output = it input toLong DurationUnit DAYS shouldBe output ```

Casey Brooks · Answer

Is Kotest 5 8 0 used in the sample repo compiled with Kotlin 1 9 20 That might be the source of the issue if it s using a different version of the Kotlin stdlib

rocketraman · Answer

I believe its 1 8 10

rocketraman · Answer

Using 1 8 10 in the repo above works the test passes I guess its not a bug then as I understand it Kotlin JS does not yet offer compat between versions Scary failure mode though

Casey Brooks · Answer

Yeah I think JS is the only target which doesn t really have any real ABI guarantees yet and you basically need all libraries on the same minor version Native uses its own klib format and JVM has classfiles which I guess are much easier to maintain binary compatibility for than compiled JS