Support Scalatest

[JLLeitschuh]

This plugin may be a good basis for supporting Scalatest for Gradle.

https://github.com/maiflai/gradle-scalatest

I didn't want the full functionality of the plugin, just the test action, so I ended up just hijacking that component with the following logic:

tasks.withType<Test>().configureEach {
    actions = mutableListOf(
        com.github.maiflai.ScalaTestAction(null)
    ) as List<Action<Task>>
}

[will-sargent-eero]

It is -- I am already using it in conjunction.

[JLLeitschuh]

So, the things so far that I've determined that don't work with this plugin:

• Excluding tests by name/class
• Test events
• Test reports in build scans

[will-sargent-eero]

the test report does work, the out of the box HTML is wonky though.