## my session controller
class SessionsController < ApplicationController
  def new
    @title ='Login'
  end

  def create
    @user =User.authenticate(params[:screen_name], params[:password])
    unless  @user.nil?
      log_out! if logged_in?
      log_in! @user
      flash[:notice] = "Welcome #{@user.screen_name}!"
      redirect_back
    else
      flash.now[:notice] = "Wrong username/password"
      render :action => "new"
    end
  end
  def destroy
      log_out!
      flash[:notice] = "Successfully logged out."
      redirect_to :controller =>"page"
  end
  private
  #this logs out the current user
  def log_out!
    session[:user_id]= nil
    reset_session
  end

  #this logs in the user passed in as a parameter
  def log_in!(user)
    session[:user_id]= user.id
  end
end
##my session user test
require 'test_helper'

class SessionsControllerTest < ActionController::TestCase
  def test_get_new
    get :new
    assert_response :success
    assert_equal assigns(:title), "Login"
    assert_template "new"
  end
  def test_valid_login
    post :create, :screen_name =>"Sylvester",:password =>"valid_password"
    assert_redirected_to :controller => "users", :action =>"show"
    assert_equal session[:user_id], users(:Sylvester).id
    assert_not_nil users(:Sylvester).id
    assert_equal "Welcome #{users(:Sylvester).screen_name}!", flash[:notice]
  end
  def test_invalid_login
    post :create, :screen_name =>"Sylvester",:password =>"wrong password"
    assert_response :success
    assert_template "new"
    assert_equal "Wrong username/password", flash[:notice]
  end
  def test_destroy
    delete :destroy
    assert_nil session[:user_id]
    assert_redirected_to :controller => "page"
    assert_equal "Successfully logged out.", flash[:notice]
  end
end
## my new integration test
require 'test_helper'

class NavigationTest < ActionController::IntegrationTest


  def test_friendly_redirection_login

    get "users/1/edit"
    assert_redirected_to({:controller => "sessions", :action => "new"})
    follow_redirect!
    post "sessions/create",{:screen_name => "Sylvester", :password => "valid_password"}
    assert_redirected_to( {:controller => "users", :action => "edit"})
  end
  def test_friendly_redirection_register
    get "users/1/edit"
    assert_redirected_to({:controller => "sessions", :action => "new"})
    get "users/new"
    assert_response :success
    post "users/create", {:user =>{:screen_name => "Charles",:email => "Charles@Mail.com",:password => "password",:password_confirmation => "password"}}
    assert_redirected_to({:controller => "users",:action => "edit"})
  end
  def register_logout_login
    get "users/new"
    assert_template "new"
    post "users/create", {:user => {:screen_name => "Charles",:email => "Charles@Mail.com",:password => "password",:password_confirmation => "password"}}
    assert_redirected_to :controller => "users",:action => "show"
    delete "sessions/destroy"
    assert_redirected_to :controller => "page",:action => "index"
    get "sessions/new"
    post "sessions/create", {:screen_name => "Charles",:password => "password"}
    assert_redirected_to :controller => "users",:action => "show"
    assert_template "show"
  end
end