Rspec & Capybara: uninitialized constant SessionController - ruby-on-rails

Question

I am following along this tutorial's authentication process - currently on the section 'User Authentication':
http://larsgebhardt.de/user-authentication-with-ruby-on-rails-rspec-and-capybara/
I received the follower test failure:
1) User Management User log in
Failure/Error: login(#writer)
ActionController::RoutingError:
uninitialized constant SessionController
# ./spec/support/user_helper.rb:6:in `login'
# ./spec/features/users_spec.rb:27:in `block (2 levels) in <top (required)>'
Here is the specific test and helper file mention in the failure message, along with other files..
spec/features/users_spec.rb
require 'spec_helper'
background do
#writer = create(:user, :writer)
end
....
scenario 'User log in' do
activate(#writer)
login(#writer)
expect(page).to have_content "Successfully logged in."
end
spec/support/user_helper.rb
module UserHelper
def login(a)
visit root_path
click_link 'Log In'
fill_in 'session[email]', with: a.email
fill_in 'session[password]', with: a.password
click_button 'Log In'
end
def logout(a)
visit root_path
click_link 'Log Out'
end
def activate(a)
visit activate_path(:code => a.activation_code)
end
end
routes.rb
resources :session
sessions_controller.rb
class SessionsController < ApplicationController
def new
end
def create
user = User.find_by_email(params[:session][:email]).try(:authenticate, params[:session][:password])
if user
if user.is_active?
session[:user_id] = user.id
redirect_to (session[:target_url] || root_path)
flash[:notice] = "Successfully logged in."
else
redirect_to new_session_path
flash[:error] = "Account inactive. Please activate your account."
end
else
redirect_to new_session_path
flash[:error] = "Invalid email or password."
end
end
def destroy
session[:user_id] = nil
redirect_to root_path
flash[:notice] = "Successfully logged out."
end
end
new.html.erb
<h1>Log In</h1>
<%= form_for :session, url: sessions_path do |f| %>
<div>
<%= f.label :email %>
<%= f.text_field :email %>
</div>
<div>
<%= f.label :password %>
<%= f.password_field :password %>
</div>
<div>
<%= f.submit 'Log In' %>
</div>
<% end %>
rake routes
Prefix Verb URI Pattern Controller#Action
profiles_show GET /profiles/show(.:format) profiles#show
sessions_new GET /sessions/new(.:format) sessions#new
users_new GET /users/new(.:format) users#new
root GET / sessions#new
post_comments GET /posts/:post_id/comments(.:format) comments#index
POST /posts/:post_id/comments(.:format) comments#create
new_post_comment GET /posts/:post_id/comments/new(.:format) comments#new
edit_post_comment GET /posts/:post_id/comments/:id/edit(.:format) comments#edit
post_comment GET /posts/:post_id/comments/:id(.:format) comments#show
PATCH /posts/:post_id/comments/:id(.:format) comments#update
PUT /posts/:post_id/comments/:id(.:format) comments#update
DELETE /posts/:post_id/comments/:id(.:format) comments#destroy
posts GET /posts(.:format) posts#index
POST /posts(.:format) posts#create
new_post GET /posts/new(.:format) posts#new
edit_post GET /posts/:id/edit(.:format) posts#edit
post GET /posts/:id(.:format) posts#show
PATCH /posts/:id(.:format) posts#update
PUT /posts/:id(.:format) posts#update
DELETE /posts/:id(.:format) posts#destroy
sessions GET /sessions(.:format) sessions#index
POST /sessions(.:format) sessions#create
new_session GET /sessions/new(.:format) sessions#new
edit_session GET /sessions/:id/edit(.:format) sessions#edit
session GET /sessions/:id(.:format) sessions#show
PATCH /sessions/:id(.:format) sessions#update
PUT /sessions/:id(.:format) sessions#update
DELETE /sessions/:id(.:format) sessions#destroy
users GET /users(.:format) users#index
POST /users(.:format) users#create
new_user GET /users/new(.:format) users#new
edit_user GET /users/:id/edit(.:format) users#edit
user GET /users/:id(.:format) users#show
PATCH /users/:id(.:format) users#update
PUT /users/:id(.:format) users#update
DELETE /users/:id(.:format) users#destroy
profile_index GET /profile(.:format) profile#index
POST /profile(.:format) profile#create
new_profile GET /profile/new(.:format) profile#new
edit_profile GET /profile/:id/edit(.:format) profile#edit
profile GET /profile/:id(.:format) profile#show
PATCH /profile/:id(.:format) profile#update
PUT /profile/:id(.:format) profile#update
DELETE /profile/:id(.:format) profile#destroy
activate GET /activate/:code(.:format) users#activate
_header.html.erb
About
Services
<%= link_to "Sign Up", new_user_path %>
<%= link_to "Log In", new_session_path %>
<%= link_to "Log Out", "/session", method: :delete %>
I previously had an issue with configuring the User Helper file which was solved but incase it becomes relevant, you can see the answer and state of the config file here:
Rspec email_spec issue

Answer 1

You need resources :sessions, you are missing the 's'.
Edit :
You are using the delete route incorrectly, you should say
<%= link_to "Log Out",session_path(pass the current signed in user here) , method: :delete %>