work_test.exs

defmodule WorkTest do
  use ExUnit.Case
  doctest Work

  test "face_card?" do
    assert Work.face_card?(1)

    for card_value <- 2..9 do
      refute Work.face_card?(card_value)
    end

    assert Work.face_card?(10)
    assert Work.face_card?(11)
    assert Work.face_card?(12)
    assert Work.face_card?(13)
  end

  describe "testig all face card? function" do
    test "all face cards" do
      assert Work.all_face_cards?([1, 10, 11, 12, 13])
    end

    test "all non face cards" do
      refute Work.all_face_cards?([2, 3, 4, 5, 6, 7, 8, 9])
    end

    test "mixed cards" do
      refute Work.all_face_cards?([1, 2])
    end
  end
end