package scalaunittest

import org.scalatest.junit.JUnitRunner
import org.junit.runner.RunWith
import org.scalatest.Suite

@RunWith(classOf[JUnitRunner])	// Run As | JUnit Test
class ListSuite extends Suite {
	def testListLength {	// a method with a name starting with "test" is a test
	    val ls = List(2, 3, 4)
	    assert(ls.length == 3)
	}
}

A simple Scala unit test example using Suite in scalatest

Scalatest example using Suite

Scala