```ruby
require 'rails_helper'

describe "Authentication" do

  subject { page }

  describe "signin page" do
    before { visit signin_path }

    it { should have_content('Sign in')}
    it { should have_title('Sign in')}
    
  end

  
end
```

Create tests for valid and invalid authentication
user
```ruby
require 'rails_helper'

describe "Authentication" do

  subject { page }

  describe "signin page" do
    before { visit signin_path }

    it { should have_content('Sign in')}
    it { should have_title('Sign in')}

  end

  describe "signin" do
    before { visit signin_path }

    describe "with invalid information" do
      before { click_button "Sign in" }

      it { should have_title('Sign in')}
      it { should have_selector('div.alert.alert-error')}
    end

    describe "with valid information" do
      let(:user) { FactoryGirl.create(:user) }
      before do
        fill_in "Email", with: user.email.upcase
        fill_in "Password", with: user.password
        click_button "Sign in"
      end
      
      it { should have_title(user.name)}      
      it { should have_link('Profile', href: user_path(user))}
      it { should have_link('Sign out', href: signout_path)}
      it { should_not have_link('Sign in', href: signin_path)}
    end

  end

  
end
```
assistant