Rspec Test Failure due to missing link - ruby-on-rails

Question

Failures:
1) AuthenticationPages signin with invalid information followed by signout
Failure/Error: before { click_link "Sign out" }
Capybara::ElementNotFound:
no link with title, id or text 'Sign out' found
# (eval):2:in click_link'
# ./spec/requests/authentication_pages_spec.rb:28:inblock (5 levels) in '
This is a failure from my rspec test although I kind of know what is wrong but I dont know why its wrong.
My Rspec test:
describe "signin" do
before { visit signin_path }
describe "with valid information" do
let(:user) { FactoryGirl.create(:user) }
before do
fill_in "Email", with: user.email
fill_in "Password", with: user.password
click_button "Sign in"
end
it { should have_selector('title', text: 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) }
describe "followed by signout" do
before { click_link "Sign out" }
it { should have_link('Sign in') }
end
end
Sessions Controller:
class SessionsController < ApplicationController
def new
end
def create
user = User.find_by_email(params[:session][:email])
if user && user.authenticate(params[:session][:password])
sign_in user
redirect_to user
else
flash.now[:error] = 'Invalid email/password combination'
render 'new'
end
end
def destroy
sign_out
redirect_to root_path
end
end
Sessions Helper:
module SessionsHelper
def sign_in(user)
cookies.permanent[:remember_token] = user.remember_token
self.current_user = user
end
def current_user=(user)
#current_user = user
end
def current_user
#current_user ||= User.find_by_remember_token(cookies[:remember_token])
end
def signed_in?
!current_user.nil?
end
def sign_out
self.current_user = nil
cookies.delete(:remember_token)
end
end
_header.html.erb:
<header class="navbar navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<%= link_to "TechnoEdge", root_path, id: "logo" %>
<nav>
<ul class="nav pull-right">
<li><%= link_to "Home", root_path %></li>
<li><%= link_to "Help", help_path %></li>
<% if signed_in? %>
<li><%= link_to "Users", '#' %></li>
<li id="fat-menu" class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
Account <b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><%= link_to "Profile", current_user %></li>
<li><%= link_to "Settings",'#' %></li>
<li class="divider"></li>
<li>
<%= link_to "Sign out", signout_path, method: "delete" %>
</li>
</ul>
</li>
<% else %>
<li><%= link_to "Sign in", signin_path %></li>
<% end %>
</ul>
</nav>
</div>
</div>
</header>
Based on the embedded ruby code, the header should show sign in when there is no session created. However, I cant seem to be able to get it to work and I suspect that the problem lies within the sessions helper but I cant figure out what is wrong though.
Thanks in advance!
git source: https://github.com/tgxworld/sample_app