I am just starting out with ScalaTest and following http://www.scalatest.org/quick_start page

I followed the steps as outlined (by downloading the jar file linked above the code) and the code fails

 unittest vi ExampleSpec.scala
➜  unittest scalac -cp scalatest-app_2.13-3.0.8.jar ExampleSpec.scala
➜  unittest scala -cp scalatest-app_2.13-3.0.8.jar org.scalatest.run ExampleSpec
An exception or error