Hi, I've been having issues upgrading junit to version 5.12.0. After some googling found this saying that you should have a explicit dependency to

junit-platform-launcher

. That guide also points to the Gradle 8 upgrade guide, and it says to fix it you should have the following in your dependencies:

dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter:5.9.2'
    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
}

I was surprised to see that it worked as I'm not sure how Gradle resolves the version for the

junit-platform-launcher

. I thought you needed a platform dependency to leave versions out. How is the version resolve in that case? And is it actually a good practice?

The jupiter dependency brings in the JUnit BOM / platform which defines the version.

Oh ok. And is the BOM/platform meant to work across configuration types?

Do you mean because of

implementation

vs.

runtimeOnly

?

Yes

runtimeClasspath

extends from

implementation

and

runtimeOnly

.

runtimeClasspath

is the resolvable configuration that is resolved. So there the platform is present and thus effective.

Beautiful. Thanks for the clarification!