Add specs to user#create

app/controllers/users_controller.rb

@@ -11,7 +11,7 @@ class UsersController < ApplicationController
     @user = User.new(params[:user])
     if @user.save
       self.current_user = @user
-      redirect_to root_url, :notice => "Signed in!"
+      redirect_back_or_to root_url, :notice => "Signed in!"
     else
       render 'users/new', :status => 422
     end

spec/controllers/users_controller_spec.rb

@@ -2,4 +2,41 @@ require 'spec_helper'
 
 describe UsersController do
 
+  describe "POST create" do
+    let(:user) { mock_model(User) }
+
+    before do
+      User.stub(:new).and_return(user)
+    end
+
+    context "when user saved" do
+      before do
+        user.stub!(:save => true)
+      end
+
+      it "sets current_user" do
+        post :create
+        @controller.current_user.should_not be_nil
+      end
+
+      it "redirects back" do
+        post :create
+        should redirect_to(root_url)
+      end
+
+    end
+
+    context "when not valid data" do
+      before do
+        user.stub!(:save => false)
+      end
+
+      it "renders user/new" do
+        post :create
+        should render_template('users/new')
+      end
+
+    end
+
+  end
 end