diff --git a/app/models/user.rb b/app/models/user.rb
index af59046..aeadc2b 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -12,7 +12,6 @@ def tag_labels
 
   def update_with_omniauth(auth)
     update_attributes!(
-      uid: auth[:uid],
       nickname: auth[:info][:nickname],
       email: auth[:info][:email],
       image_url: auth[:info][:image],
diff --git a/config/initializers/secret_token.rb b/config/initializers/secret_token.rb
index f7563c0..3803a53 100644
--- a/config/initializers/secret_token.rb
+++ b/config/initializers/secret_token.rb
@@ -9,4 +9,4 @@
 
 # Make sure your secret_key_base is kept private
 # if you're sharing your code publicly.
-TaggedGist::Application.config.secret_key_base = '1403ff6447012fb7ef1cc53d21a36935171f132130489d4d457cea155197005dbdf1f0c42507f8d73c5c3bcd2d179426f87e0c1d7ef4a8b52f79e23368e6305a'
+TaggedGist::Application.config.secret_key_base = ENV['RAILS_SECRET_KEY']
diff --git a/spec/controllers/root_controller_spec.rb b/spec/controllers/root_controller_spec.rb
index accd064..d88d57c 100644
--- a/spec/controllers/root_controller_spec.rb
+++ b/spec/controllers/root_controller_spec.rb
@@ -1,11 +1,66 @@
 require 'spec_helper'
 
 describe RootController do
+  let(:user) {FactoryGirl.create(:user)}
 
-  describe "GET 'index'" do
-    it "returns http success" do
-      get 'index'
-      response.should be_success
+  def valid_session
+    {user: user.id}
+  end
+
+  describe "GET index" do
+    context "with not sign in" do
+      it "returns http success" do
+        get :index
+        expect(response).to be_success
+      end
+
+      it "should not called User#tag_labels" do
+        User.any_instance.should_not_receive(:tag_labels)
+        get :index
+      end
+    end
+
+    context "with sign in" do
+      let!(:tags) do
+        tags = ["ruby", "javascript"]
+        tags.each_with_index do |tag, i|
+          g = Gist.new(gid: "#{Time.now.usec}#{i}", user_id: user.id)
+          Tag.create!(name: tag, user_id: user.id, gist_id: g.id)
+        end
+        tags
+      end
+
+      it "return http success" do
+        get :index, {}, valid_session
+        expect(response).to be_success
+      end
+
+      it "assigns tags as all tag labels" do
+        get :index, {}, valid_session
+        expect(assigns(:tags)).to eq(tags)
+      end
+
+      it "assigns gists as all gists" do
+        get :index, {}, valid_session
+        expect(assigns(:gists)).to eq(user.gists)
+      end
+
+      it "assigns gists as specified tag" do
+        get :index, {tag: "ruby"}, valid_session
+        assigns(:gists).each do |g|
+          expect(g.tags.inject(false){|f,t| f = true if t.name == "ruby"}).to be_true
+        end
+      end
+
+      it "assigns current_tag as nil" do
+        get :index, {}, valid_session
+        expect(assigns(:current_tag)).to be_nil
+      end
+
+      it "assigns current_tag as specified tag" do
+        get :index, {tag: "ruby"}, valid_session
+        expect(assigns(:current_tag)).not_to be_nil
+      end
     end
   end
 
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 7929923..9ba935e 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -6,14 +6,14 @@ def valid_auth
       uid: "12345678",
       info: {
         nickname: "example",
-        email: "MyString",
-        image: "MyString",
+        email: "user@example.com",
+        image: "image_url",
         urls: {
-          GitHub: "MyString"
+          GitHub: "github_url"
         }
       },
       credentials: {
-        token: "MyString"
+        token: "oauth_token"
       }
     }
   end
@@ -33,4 +33,75 @@ def valid_auth
       expect{User.create_with_omniauth(nil)}.to raise_error(NoMethodError)
     end
   end
+
+  describe "#tag_labels" do
+    let!(:user) do
+      user = FactoryGirl.create(:user)
+      ["ruby", "perl", "php", "python", "java", "c"].each_with_index do |t,i|
+        2.times do |x|
+          g = Gist.create!(
+            gid: "#{x.to_s}#{i.to_s}",
+            description: "MyString",
+            html_url: "MyString",
+            embed_url: "MyString",
+            public_gist: true,
+            user_id: user.id
+          )
+          Tag.create!(name: t, user_id: user.id, gist_id: g.id)
+        end
+      end
+      user
+    end
+
+    it "should get labels" do
+      expect(user.tag_labels).to eq(["ruby", "perl", "php", "python", "java", "c"])
+    end
+
+    it "should return empty array if user don't have tags" do
+      user = FactoryGirl.create(:user)
+      expect(user.tag_labels).to be_empty
+    end
+  end
+
+  describe "#update_with_omniauth" do
+    let!(:user) {FactoryGirl.create(:user)}
+
+    it "nickname should be updated" do
+      expect {
+        user.update_with_omniauth(valid_auth)
+      }.to change(user, :nickname)
+    end
+
+    it "email should be updated" do
+      expect {
+        user.update_with_omniauth(valid_auth)
+      }.to change(user, :email)
+    end
+
+    it "image_url should be updated" do
+      expect {
+        user.update_with_omniauth(valid_auth)
+      }.to change(user, :image_url)
+    end
+
+    it "github_url should be updated" do
+      expect {
+        user.update_with_omniauth(valid_auth)
+      }.to change(user, :github_url)
+    end
+
+    it "access_token should be updated" do
+      expect {
+        user.update_with_omniauth(valid_auth)
+      }.to change(user, :access_token)
+    end
+
+    it "exception should be generated if not arguments" do
+      expect{user.update_with_omniauth}.to raise_error(ArgumentError)
+    end
+
+    it "exception should be generated if argument is nil" do
+      expect{user.update_with_omniauth(nil)}.to raise_error(NoMethodError)
+    end
+  end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index b468569..2d0cd1e 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -9,6 +9,8 @@
   add_filter "/vendor/"
 end
 
+ENV['RAILS_SECRET_KEY'] = "5ebe2294ecd0e0f08eab7690d2a6ee69"
+
 # This file is copied to spec/ when you run 'rails generate rspec:install'
 ENV["RAILS_ENV"] ||= 'test'
 require File.expand_path("../../config/environment", __FILE__)