Add Epitaph Golem

Fixes #230

lib/magic/card.rb

@@ -131,6 +131,32 @@ def move_to_exile!
       move_zone!(game.exile)
     end
 
+    def move_zone!(new_zone)
+      old_zone = zone
+      if old_zone
+        game.notify!(
+          Events::CardLeavingZoneTransition.new(
+            self,
+            from: old_zone,
+            to: new_zone
+          )
+        )
+
+        old_zone.remove(self)
+      end
+
+      new_zone.add(self) unless new_zone.is_a?(Magic::Zones::Battlefield)
+
+      game.notify!(
+        Events::CardEnteredZoneTransition.new(
+          self,
+          from: old_zone,
+          to: new_zone
+        )
+      )
+
+    end
+
     def resolve!(enters_tapped: enters_tapped?, kicked: false)
       if permanent?
         permanent = Magic::Permanent.resolve(
@@ -216,33 +242,5 @@ def add_choice(choice, **args)
     def opponents
       game.opponents(controller)
     end
-
-    private
-
-    def move_zone!(new_zone)
-      old_zone = zone
-      if old_zone
-        game.notify!(
-          Events::CardLeavingZoneTransition.new(
-            self,
-            from: old_zone,
-            to: new_zone
-          )
-        )
-
-        old_zone.remove(self)
-      end
-
-      new_zone.add(self) unless new_zone.is_a?(Magic::Zones::Battlefield)
-
-      game.notify!(
-        Events::CardEnteredZoneTransition.new(
-          self,
-          from: old_zone,
-          to: new_zone
-        )
-      )
-
-    end
   end
 end

lib/magic/cards/epitaph_golem.rb

@@ -0,0 +1,25 @@
+module Magic
+  module Cards
+    class EpitaphGolem < Creature
+      name "Epitaph Golem"
+      artifact_creature_type "Golem"
+      cost generic: 4
+
+      class Ability < ActivatedAbility
+        costs "{2}"
+
+        def target_choices
+          controller.graveyard
+        end
+
+        def resolve!(target:)
+          trigger_effect(:move_zone, source: source, target: target, destination: controller.library)
+        end
+      end
+
+      def activated_abilities
+        [Ability]
+      end
+    end
+  end
+end

lib/magic/cards/shared/events.rb

@@ -31,6 +31,8 @@ def trigger_effect(effect, source: self, **args)
             game.add_effect(Effects::LoseLife.new(source: source, **args))
           when :modify_power_toughness
             game.add_effect(Effects::ApplyPowerToughnessModification.new(source: source, **args))
+          when :move_zone
+            game.add_effect(Effects::MoveZone.new(source: source, **args))
           when :phase_out
             game.add_effect(Effects::PhaseOut.new(source: source, **args))
           when :return_to_owners_hand

lib/magic/effects/move_zone.rb

@@ -0,0 +1,20 @@
+module Magic
+  module Effects
+    class MoveZone < TargetedEffect
+      attr_reader :destination
+
+      def initialize(destination:, **args)
+        @destination = destination
+        super(**args)
+      end
+
+      def requires_choices?
+        false
+      end
+
+      def resolve!
+        target.move_zone!(destination)
+      end
+    end
+  end
+end

spec/cards/epitaph_golem_spec.rb

@@ -0,0 +1,23 @@
+require "spec_helper"
+
+RSpec.describe Magic::Cards::EpitaphGolem do
+  include_context "two player game"
+
+  let!(:permanent) { ResolvePermanent("Epitaph Golem") }
+  let!(:wood_elves) { Card("Wood Elves") }
+
+  before do
+    p1.graveyard.add(wood_elves)
+  end
+
+  it "can move card from graveyard to library" do
+    p1.add_mana(white: 2)
+    p1.activate_ability(ability: permanent.activated_abilities.first) do
+      _1.pay_mana(generic: { white: 2 })
+      _1.targeting(wood_elves)
+    end
+
+    expect(wood_elves.zone).to be_library
+    expect(p1.library.last).to eq(wood_elves)
+  end
+end