Tests for bootcamp week-1 list problems

ListUtilsTest.scala

import assignments.ListUtils._
import org.scalatest.FlatSpec

class ListUtilsTest extends FlatSpec {
  behavior of "ListUtils"

  it should "find last of the list" in  {
    assert(findLast(List(1,2,3,4,5)) == 5)
    assert(findLast(List(1)) == 1)
  }

  it should "find len of the list" in {
    assert(lenCustom(List(1,2,3)) == 3)
    assert(lenCustom(List(1)) == 1)
  }

  it should "find penultimate of the list" in {
    assert(penultimate(List(1,3,4)) == 3)
    assert(penultimate(List(1,2)) == 1)
  }

  it should "reverse the list" in {
    assert(reverse(List(1,2,3)) == List(3,2,1))
  }

  it should "remove duplicates in the list" in {
    assert(removeDuplicates(List(1,1,1,1,2,2,2,1,1,3,3,4,4,1,1,3,3,3,3,6)) == List(1, 2, 1, 3, 4, 1, 3, 6))
  }

  it should "remove every nth element from list" in {
    assert(drop(2, List(1,2,3,4,5,6,7,8)) == List(1,3,5,7))
    assert(drop(2, List(1,2,3,4,5,6,7,8,9)) == List(1,3,5,7,9))
  }

  it should "slice the list from start to end" in {
    assert(slice(2,4, List(1,2,3,4,5,6,7,8)) == List(3,4))
    assert(slice(0,1, List(1,2,3,4,5,6,7,8)) == List(1))

  }


}

You could've also used the ShouldMatchers that would make the Tests even more elegant and readable. I use assert for boolean conditions alone.