Minimum SDK < 24 and coreLibraryDesugaring causes NoSuchMethodError in ConcurrentHashMap

First off, I want to thank the maintainers of this repo for doing the herculean work of getting JUnit 5 up and running on Android!

I’m running into an issue where I can run my instrumentation tests just fine within Android Studio, but if I try to run them from the command line I get two sets of errors.

First off, these are the errors I’m seeing:

First error:

module.myModule.myAndroidTest > initializationError[emulator-5554 - 8.1.0] FAILED 
        java.lang.NoSuchMethodError: No static method newKeySet()Lj$/util/concurrent/ConcurrentHashMap$KeySetView; in class Lj$/util/concurrent/ConcurrentHashMap; or its super classes (declaration of 'j$.util.concurrent.ConcurrentHashMap' appears in /data/app/module.ins.test-TnAh7dSYSDIdYT5oUAsyiQ==/base.apk!classes6.dex)
        at org.junit.platform.commons.logging.LoggerFactory.<clinit>(LoggerFactory.java:36)

Second error:

module.myModule.myPackage.myOtherAndroidTest > initializationError[emulator-5554 - 8.1.0] FAILED 
        java.lang.IllegalStateException: junit-platform-runner not found on runtime classpath of instrumentation tests; please review your androidTest dependencies or raise an issue.
        at de.mannodermaus.junit5.AndroidJUnit5Builder.runnerForClass(RunnerBuilder.kt:72)

The second error is repeated for each class in my androidTest folder.

Here’s the build.gradle for the module I’m attempting to test:

apply plugin: 'com.android.library'
apply plugin: "de.mannodermaus.android-junit5"

android {
    compileSdkVersion ...

    defaultConfig {
        ...
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        testInstrumentationRunnerArgument "runnerBuilder", "de.mannodermaus.junit5.AndroidJUnit5Builder"
    }

    ...

    compileOptions {
        coreLibraryDesugaringEnabled=true

        sourceCompatibility = "1.8"
        targetCompatibility = "1.8"
    }

    packagingOptions {
        exclude "META-INF/LICENSE*"
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
   
    ...

    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.0.10'

    testImplementation "junit:junit:${rootProject.ext.junitVer}"
    testImplementation "org.junit.jupiter:junit-jupiter-api:5.6.2"
    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.6.2"
    testRuntimeOnly "org.junit.vintage:junit-vintage-engine:5.6.2"

    androidTestImplementation "androidx.test:runner:1.3.0"
    androidTestImplementation "org.junit.jupiter:junit-jupiter-api:5.6.2"

    androidTestImplementation "de.mannodermaus.junit5:android-test-core:1.2.0"
    androidTestRuntimeOnly "de.mannodermaus.junit5:android-test-runner:1.2.0"

    androidTestImplementation "org.mockito:mockito-core:3.3.3"
    testImplementation "org.mockito:mockito-core:3.3.3"
}

...

The errors I’m seeing are awfully close to the errors in this stack overflow post, but we’re not using Kotlin so the proposed solution doesn’t work for us (unless the issue is some library we’re using is using Kotlin under the hood?)

Any help anyone could be provide would be much appreciated. Thank you!

EDIT: Tried to add Kotlin to the project so I could specify the jvmTarget in the kotlinOptions block and add a dependency on the jdk8 standard library as outlined in the linked StackOverflow post but alas no luck.

EDIT: It looks like updating the minSdk to >= 24 fixes the issue.

[mannodermaus]

After more experimentation, I am convinced that this behavior is a bug inside the Android Gradle Plugin and/or L8 desugaring stack. I have raised an issue on the Google bug tracker for it and will lock down this ticket until there is some feedback from the Android team.

https://issuetracker.google.com/issues/195786468

[mannodermaus]

Nothing to share, sorry. Feel free to star the ticket on the Google issue tracker (linked above) to give some visibility to it. It’s not in the realm of possibility for the plugin to address this problem, unfortunately.