Add Leafkin Avenger

Fixes #231

lib/magic/cards/leafkin_avenger.rb

@@ -0,0 +1,36 @@
+module Magic
+  module Cards
+    class LeafkinAvenger < Creature
+      card_name "Leafkin Avenger"
+      cost "{2}{R}{G}"
+      creature_type "Elemental Druid"
+      power 4
+      toughness 3
+
+      class Ability < ActivatedAbility
+        costs "{T}"
+
+        def resolve!
+          count = creatures_you_control.with_power { |power| power >= 4 }.count
+          controller.add_mana(green: count)
+        end
+      end
+
+      class Ability2 < ActivatedAbility
+        costs "{7}{R}"
+
+        def target_choices
+          game.players + game.battlefield.planeswalkers
+        end
+
+        def resolve!(target:)
+          trigger_effect(:deal_damage, damage: source.power, target: target)
+        end
+      end
+
+      def activated_abilities
+        [Ability, Ability2]
+      end
+    end
+  end
+end

spec/cards/leafkin_avenger_spec.rb

@@ -0,0 +1,43 @@
+require "spec_helper"
+
+RSpec.describe Magic::Cards::LeafkinAvenger do
+  include_context "two player game"
+
+  subject(:leafkin_avenger) { ResolvePermanent("Leafkin Avenger") }
+
+  before do
+    ResolvePermanent("Epicure Of Blood") # has 4 Power
+    ResolvePermanent("Wood Elves") # has 1 Power
+  end
+
+  context "first activated ability" do
+    it "taps and adds 2 green" do
+      # Counts itself (Leafkin Avenger) and Epicure of Blood
+      ability = leafkin_avenger.activated_abilities.first
+      p1.activate_ability(ability: ability)
+
+      expect(leafkin_avenger).to be_tapped
+      expect(p1.mana_pool[:green]).to eq(2)
+    end
+  end
+
+  context "second activated ability" do
+    let!(:basri_ket) { ResolvePermanent("Basri Ket", owner: p2) }
+
+    it "deals damage to target player or planeswalker" do
+      ability = leafkin_avenger.activated_abilities.last
+      expect(ability.target_choices).to include(p1)
+      expect(ability.target_choices).to include(p2)
+      expect(ability.target_choices).to include(basri_ket)
+
+      p1.add_mana(red: 8)
+      p1.activate_ability(ability: ability) do
+        _1.pay_mana(generic: { red: 7 }, red: 1)
+        _1.targeting(p2)
+      end
+
+      expect(p2.life).to eq(16)
+    end
+  end
+
+end