scala libraryDependencies += "org.scala-js" %% "scalajs-test-interface" % "1.1.0" % "test" scala import org.junit.Test import org.scalatest._ class MyTest extends FunSuite { test("Addition test") { val sum = 2 + 2 assert(sum == 4) } test("Subtraction test") { val difference = 5 - 3 assert(difference == 2) } }