Hi all! I’m using the Ktor MockEngine in the commo...

# multiplatform

[Hossein Amini]

Hi all!
I’m using the Ktor MockEngine in the commonTest but when I run the test units on iOS it says:

kotlin.Error: Ktor native HttpClient requires kotlinx.coroutines version with native-mt suffix (like 1.3.9-native-mt). Consider checking the dependencies

I’m currently using this dependency in the commonMain

org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0-native-mt

And there is no issue when I run the app on the iOS but when I run test units on the iOS I get the error I mentioned above.
How can I fix it?

[Tijl]

use org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0-native-mt!! in your declaration, likely something else specifies org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0 somewhere which gradle resolves as a higher version.

[Tijl]

!! forces the version

[Hossein Amini]

Thank you. By forcing the version it says:

kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen

@Tijl

[Hossein Amini]

Actually by adding org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0-native-mt!! to the commonTest the problem fixed but when I build an instance of Ktor in my custom class it says kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen but by creating an instance of Ktor directly in the test classes everything works correctly.

[hfhbd]

run gradle dependencies to find the upgrading dependency

[Tijl]

yeah that’s another problem, now you seem to be using the coroutines version you want/need