Interactive Scala testing in sbt test:console

scala-junit.scala

// Imports need to be done even though you entered a test:console

import org.junit.Test
import org.junit._
import org.junit.Assert._

// Create a test class inline

scala> :paste
// Entering paste mode (ctrl-D to finish)

class Tests {
  @Test def testSuccess() {
     assertEquals(0, 0)
  }
}

// Use JUnitCore to run the tests

val res = org.junit.runner.JUnitCore.runClasses(classOf[Tests])
res.wasSuccessful