How to build test jar with new kotlin/js plugin an...

# javascript

[Robert Jaros]

How to build test jar with new kotlin/js plugin and kotlin dsl?
Currently with old plugin and groovy dsl I use this:

task testJar(type: Jar, dependsOn: testClasses) {
    baseName = "${project.archivesBaseName}"
    classifier = "tests"
    from sourceSets.test.output
}

When I try to just do the same thing I've got an error > SourceSet with name 'test' not found..

[Ilya Goncharov [JB]]

If you use multiplatform plugin, source set’s name is jsTest

[Robert Jaros]

No, I'm using js plugin

[Robert Jaros]

I've checked - sourceSets collection is empty

[Robert Jaros]

I can use kotlin.sourceSets but I don't know how to get output

[Ilya Goncharov [JB]]

I need to check it, but anyway it is gradle live collection, so you can subscribe on its changing with sourceSets.all { } and if it will be fulfilled, closure should be executed

[Robert Jaros]

It's not executed

[Ilya Goncharov [JB]]

Ok, I see your problem. Firstly, new js plugin and multiplatform now works in the similar mechanism.
It is right, that you need to use our own kotlin.sourceSets because we don’t register in common case it in default gradle source sets (because we need complex case with mutiplatform)
KotlinSourceSet doesn’t contain output, because it is only source set (for example in MPP you can have common and js source sets, and definition of output of source set is undefined). We have another abstraction, that contain output, it is compilation, so you can use this

from(kotlin.target.compilations["test"].output.allOutputs)

[Robert Jaros]

I've managed to also get it work with from(tasks["compileTestKotlinJs"].outputs)

[Robert Jaros]

which would be better?

[Ilya Goncharov [JB]]

I think, that with compilation is more flexible, because in theory compilation output may be wider than only compile task output