SystemEnvironmentTestListener - Unable to make field private final java.util.Map java.util.Collections$UnmodifiableMap.m accessible:

Which version of Kotest are you using KoTest - 5.3

Kotlin - 1.6.20

I’m getting the following error when trying to run this code line in a WordSpec test.

class PublisherServiceTest : WordSpec() {

    private val pubSubService = install(TestContainerExtension(pubSubContainer)) {
        addExposedPort(8085)
    }
    private val address: String = "${pubSubService.host}:${pubSubService.firstMappedPort}"

    override fun listeners() = listOf(SystemEnvironmentTestListener("PUBSUB_TARGET", address)) //<<< FAILING HERE
    init {
        ...
    }
}

Error Message: Unable to make field private final java.util.Map java.util.Collections$UnmodifiableMap.m accessible: module java.base does not "opens java.util" to unnamed module @309e345f

This is directly thrown when in SystemEnviromentExtensions.kt line 99 is called:

classOfMap.getDeclaredField("m").asAccessible().get(systemEnv) as MutableMap<String, String>

method: getEditableMapOfVariables

@Suppress("UNCHECKED_CAST")
private fun getEditableMapOfVariables(): MutableMap<String, String> {
   val systemEnv = System.getenv()
   val classOfMap = systemEnv::class.java

   return classOfMap.getDeclaredField("m").asAccessible().get(systemEnv) as MutableMap<String, String>
}

Is there something I’m doing wrong?

[Kantis]

I added info here on how you can work around it: https://kotest.io/docs/extensions/system_extensions.html (see the blue info box)

[jmfayard]

@sksamuel I first raised #3112 which brought me here.

So I edited gradle.properties

-org.gradle.jvmargs=-Dfile.encoding=UTF-8 -Xmx4608M
+org.gradle.jvmargs=-Dfile.encoding=UTF-8 -Xmx4608M --add-opens=java.base/java.util=ALL-UNNAMED

I had a first issue Overriding a variable when mode is set to SetOrError. Use another OverrideMode to allow this. Trying to set {FIXED_OTP=hi42}

That’s not a bug per se, but the fix was not obvious, it would be nice to mention it in the documentation https://kotest.io/docs/extensions/system_extensions.html

-withEnvironment(OtpSource.FIXED_OTP, "hi42", , OverrideMode.SetOrOverride) {
+withEnvironment(OtpSource.FIXED_OTP, "hi42") {
         //
}

Alas that still fails

java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Map java.util.Collections$UnmodifiableMap.m accessible: module java.base does not "opens java.util" to unnamed module @47089e5f

https://scans.gradle.com/s/rqvdpgm2f5fq6/tests/:test/com.tignum.backend.core.health.SanityCheckerTest/fixed OneTimePassword can be enabled only in the local environment()?expanded-stacktrace=WyIwIl0&top-execution=1