Add Llanowar Visionary

lib/magic/cards/llanowar_visionary.rb

@@ -0,0 +1,22 @@
+module Magic
+  module Cards
+    LlanowarVisionary = Creature("Llanowar Visionary") do
+      cost generic: 1, green: 1
+      creature_type "Elf Druid"
+      power 2
+      toughness 2
+
+      enters_the_battlefield do
+        actor.trigger_effect(:draw_cards)
+      end
+    end
+
+    class LlanowarVisionary < Creature
+      class ManaAbility < Magic::TapManaAbility
+        choices :green
+      end
+
+      def activated_abilities = [ManaAbility]
+    end
+  end
+end

spec/cards/llanowar_visionary_spec.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Magic::Cards::LlanowarVisionary do
+  include_context "two player game"
+
+  let(:forest) { Card("Forest") }
+
+  before do
+    p1.library.add(forest)
+  end
+
+  subject { ResolvePermanent("Llanowar Visionary", owner: p1) }
+
+  context "ETB effect" do
+    it "controller draws a card" do
+      expect(p1).to receive(:draw!)
+      subject
+    end
+  end
+
+  context "stats" do
+    it "is a 2/2" do
+      expect(subject.power).to eq(2)
+      expect(subject.toughness).to eq(2)
+    end
+  end
+
+  context "mana ability" do
+    it "taps for one green mana" do
+      p1.activate_ability(ability: subject.activated_abilities.first)
+      expect(p1.mana_pool[:green]).to eq(1)
+    end
+  end
+end