Hey folks after upgrading my multiplatform project to kotlin

Question

Hey folks after upgrading my multiplatform project to kotlin 1 3 20 and ktor 1 1 2 I am running into this exception when running my tests under common androidTest The problem just occurs when running the tests

Tobi · Answer

These are my dependencies kotlin targets fromPreset presets android android Change to `presets iosArm64` to deploy the app to iPhone fromPreset presets iosX64 iOS compilations main outputKinds FRAMEWORK sourceSets commonMain dependencies implementation org jetbrains kotlin kotlin stdlib common implementation org jetbrains kotlinx kotlinx coroutines core common $coroutines version implementation org jetbrains kotlinx kotlinx serialization runtime common $serialization version implementation io ktor ktor client core $ktor version implementation io ktor ktor client json $ktor version commonTest dependencies implementation org jetbrains kotlin kotlin test common implementation org jetbrains kotlin kotlin test annotations common androidMain dependencies implementation org jetbrains kotlin kotlin stdlib jdk8 implementation org jetbrains kotlinx kotlinx coroutines core $coroutines version implementation org jetbrains kotlinx kotlinx serialization runtime $serialization version implementation io ktor ktor client core jvm $ktor version implementation io ktor ktor client json jvm $ktor version implementation io ktor ktor client okhttp $ktor version androidTest dependencies implementation org jetbrains kotlin kotlin test implementation org jetbrains kotlin kotlin test junit api io ktor ktor client mock jvm $ktor version implementation com nhaarman mockitokotlin2 mockito kotlin 2 1 0 implementation org mockito mockito inline 2 22 0 iOSMain dependencies implementation org jetbrains kotlinx kotlinx coroutines core native $coroutines version implementation org jetbrains kotlinx kotlinx serialization runtime native $serialization version implementation io ktor ktor client ios $ktor version implementation io ktor ktor client core native $ktor version implementation io ktor ktor client json native $ktor version

Tobi · Answer

For some reason `io ktor client features json JsonFeature` cannot be resolved which should be included in `ktor client json`

Sabrina Namur · Answer

Did you update kotlinx serialization too It is required because to binary compatibility issues

Tobi · Answer

I am using `0 10 0` for kotlinx serialization and besides the test everything works fine ext kotlin version = 1 3 20 ext ktor version = 1 1 2 ext serialization version = 0 10 0 ext coroutines version = 1 1 1

Tobi · Answer

I digged a bit deeper into this and realized I can reproduce it also just with `kotlinx serialization json Json` Furthermore I isolated the issue into this example repository <https github com tobiasheine Kotlin Multiplatform java lang NoClassDefFoundError> just run ` gradlew common test` to reproduce the `java lang NoClassDefFoundError` Any help would be much appreciated pray