dice_test_1.exs

defmodule Dargons.DiceTest do
  use ExUnit.Case
  alias Dargons.Dice

  describe "rolling dice" do
    test "rolling a single D20" do
      [first_dice | _] = dice = Dice.roll(20)
      assert length(dice) == 1
      assert first_dice <= 20
    end

    test "rolling multiple D20's" do
      dice = Dice.roll(20, 3)

      dice
      |> Enum.each(&assert &1 <= 20)

      assert length(dice) == 3
    end
  end
end