myPollApp.txt

-rails new myPollApp
Add those gems inside development group:
 gem 'shoulda-matchers'
 gem 'rspec-rails'
 gem 'factory_girl_rails'
 gem 'capybara'
Run bundle install

>rails g model User email name provider uid
>rake db:migrate if any  mistake run rake db:rollback
>rails g rspec:install , rails db:migrate RAILS_ENV=test

================================rspec================
https://github.com/rspec/rspec-rails
https://github.com/thoughtbot/shoulda-matchers
------------------
You can supply this information by using a configuration block. Place the following in rails_helper.rb:

Shoulda::Matchers.configure do |config|
require 'shoulda/matchers'

Shoulda::Matchers.configure do |config|
  config.integrate do |with|
    # Choose a test framework:
    with.test_framework :rspec
    # with.test_framework :minitest
    # with.test_framework :minitest_4
    # with.test_framework :test_unit

    # # Choose one or more libraries:
    # with.library :active_record
    # with.library :active_model
    # with.library :action_controller
    # Or, choose the following (which implies all of the above):
    with.library :rails
  end
end
==================================================
Firts test type this in factories/models/user_spec.rb
	require 'rails_helper'

	RSpec.describe User, type: :model do
  	it { should validate_presence_of(:email) }
	it { should_not allow_value("eda@codigo").for(:email) }
	it { should allow_value("eda@codigo.com").for(:email) }
  

	end
This should fail, to be able to past the test validate in model for user in model/user.rb type this:
  validates :email, presence: true
#####You did pass you firt test hurray!!!!!!!
----------------
To be able to test email add this gem 
https://github.com/hallelujah/valid_email
- gem 'valid_email'
IN models/user.rb change the line to this> 
	validates :email, presence: true, email: true
Run >rspec , and all this 3 test should past succesfully '"hurray"''
-----------------
Add two more test to user.spec.rb;
  it { should validate_presence_of(:email) }
  it { should_not allow_value("eda@codigo").for(:email) }
  it { should allow_value("eda@codigo.com").for(:email) }
  it { should validate_presence_of(:uid) }
  it { should validate_presence_of(:provider) }

Then validate in the model models/user.rb
 	validates :email, presence: true, email: true
	validates :uid, presence: true
	validates :provider, presence: true
All 5 test should past!
>   5 examples, 0 failures
=============================================
2-How to authenticate users with tokens
=============================================
*Tokens_tbl
	-id user->Token with user
	-Random string ex-> 123bcdssldc41681asfjsa
	-Expiration date
	-user_id <-Foreign Key<- makes faster search for queries
	
*User_tbl
	-User will has many tokens

*Applications_tbl
	-Secrept key
	-App ID
-----------------------------
Create table Token
>rails g model Token expires_at:datetime user:references token
Add this to models/user.rb 
	has_many :tokens
Add this in models/token.rb
  before_create :generate_token

  private
  # This is rails method to genrate random tokens
  def generate_token
  	# Ciclo do while in rails
  		begin
  		self.token = SecureRandom.hex
  		end while Token.where(token: self.token).any?
  		#expires for 1 montn 'from_now is a helper of rails'
  		self.expires_at = 1.month.from_now 
  end
----------
How to use factory_girl
https://github.com/thoughtbot/factory_girl_rails
----------
Add this in factories/tokens.tb
 	factory :token do
         expires_at "2016-12-12 19:34:35"
    	# user nil
   	 # token "MyString"
   	 association :user, factory: :user
  end

In factories/users.rb fill the fields like
	 email "eda@codigo.com"
    	name "Uriel"
    	provider "github"
    	uid "duah18wd21qwq2w1"
Add this method in models/token.rb
	 def is_valid?

  	 end
----------------
if has pending migrations run: rails db:migrate RAILS_ENV=test
Then run 'rspec' , this test should fail
In models/token.rb make the method
	  def is_valid?
    DateTime.now < self.expires_at
  end

  private
  # This is rails method to genrate random tokens
  def generate_token
  	# Ciclo do while in rails
  		begin
  		  self.token = SecureRandom.hex
  		end while Token.where(token: self.token).any?
  		#expires for 1 montn 'from_now is a helper of rails'
  		self.expires_at ||= 1.month.from_now 
  end
---------
In factories/models/token_spec.rb add this two tests:
 it "should return valid when is not expired" do
  	token = FactoryGirl.create(:token,expires_at: DateTime.now + 1.minute)
  	expect(token.is_valid?).to eq(true)
  end

  it "should return invalid when is expired" do
  	token = FactoryGirl.create(:token,expires_at: DateTime.now - 1.day)
  	expect(token.is_valid?).to eq(false)
  end
---
Then run> rspec and all test should past "Hurrayyyy"