require "test_helper"
require "metal_adventures/dice"

module MetalAdventures
  class DiceTest < Minitest::Test
    def test_parser_full
      d1 = Dice.parse("1/2 SC : super nom")
      assert d1
      assert_equal "super nom", d1.description
      assert_equal 1, d1.n
      assert_equal 2, d1.difficulty
      assert_equal :SC, d1.modifiers.reduced
    end

    def test_parser_not_a_match
      refute Dice.parse("coucou 1/2 SC")
      refute Dice.parse("1x/2 SC")
      refute Dice.parse("1/2 SC #")
      refute Dice.parse("1/2 # : name")
    end

    def test_parser_parts
      d1 = Dice.parse("1/2 SC")
      assert d1
      assert_equal "", d1.description
      assert_equal 1, d1.n
      assert_equal 2, d1.difficulty
      assert_equal :SC, d1.modifiers.reduced

      d2 = Dice.parse("1/2 : super nom")
      assert d2
      assert_equal "super nom", d2.description
      assert_equal 1, d2.n
      assert_equal 2, d2.difficulty
      assert_nil d2.modifiers.reduced

      d3 = Dice.parse("1 SC : super nom")
      assert d3
      assert_equal "super nom", d3.description
      assert_equal 1, d3.n
      assert_equal 1, d3.difficulty
      assert_equal :SC, d3.modifiers.reduced

      d4 = Dice.parse("1")
      assert d4
      assert_equal "", d4.description
      assert_equal 1, d4.n
      assert_equal 1, d4.difficulty
      assert_nil d4.modifiers.reduced
    end

    def test_make_parser
      assert "!roll 1".match(Dice.make_parser(prefix: "!roll "))
      assert "#roll 1".match(Dice.make_parser(prefix: "#roll "))
    end

    def test_roll
      Kernel.stubs(:rand).returns(1, 2, 3, 4, 5, 6)
      d = Dice.new(n: 6)
      d.roll!
      assert_equal 3, d.result
    end

    def test_roll_with_rerolls
      Kernel.stubs(:rand).returns(1, 2, 3, 4, 5, 6)
      d = Dice.new(n: 3, modifiers: Dice::Modifiers.new(:SC))
      d.roll!
      assert_equal 3, d.result
    end
  end
end