Implements User.administrator? & User.moderator?

app/models/user.rb

@@ -19,4 +19,12 @@ class User < ActiveRecord::Base
     voted = votes.where("votable_type = ? AND votable_id IN (?)", "Debate", debates_ids)
     voted.each_with_object({}){ |v,_| _[v.votable_id] = v.vote_flag }
   end
+
+  def administrator?
+    @is_administrator ||= Administrator.where(user_id: id).exists?
+  end
+
+  def moderator?
+    @is_moderator ||= Moderator.where(user_id: id).exists?
+  end
 end

spec/factories.rb

@@ -31,4 +31,12 @@ FactoryGirl.define do
     debate
   end
 
+  factory :administrator do
+    user
+  end
+
+  factory :moderator do
+    user
+  end
+
 end

spec/models/user_spec.rb

@@ -7,13 +7,13 @@ describe User do
       @user = create(:user)
     end
 
-    it "should return {} if no debate" do
+    it "returns {} if no debate" do
       expect(@user.votes_on_debates()).to eq({})
       expect(@user.votes_on_debates([])).to eq({})
       expect(@user.votes_on_debates([nil, nil])).to eq({})
     end
 
-    it "should return a hash of debates ids and votes" do
+    it "returns a hash of debates ids and votes" do
       debate1 = create(:debate)
       debate2 = create(:debate)
       debate3 = create(:debate)
@@ -73,4 +73,28 @@ describe User do
     end
   end
 
+  describe "administrator?" do
+    it "is false when the user is not an admin" do
+      expect(subject.administrator?).to be false
+    end
+
+    it "is true when the user is an admin" do
+      subject.save
+      create(:administrator, user: subject)
+      expect(subject.administrator?).to be true
+    end
+  end
+
+  describe "moderator?" do
+    it "is false when the user is not an admin" do
+      expect(subject.moderator?).to be false
+    end
+
+    it "is true when the user is an admin" do
+      subject.save
+      create(:moderator, user: subject)
+      expect(subject.moderator?).to be true
+    end
+  end
+
 end