rspec-practice.md

Rspec Practice

Create a rails app

rails new rspec-practice -T -d postgresql
cd rspec-practice

Add rspec-rails gem:

group :development, :test do
  gem "rspec-rails"
end

bundle and run the rspec installer:

bundle
rails generate rspec:install

Model

Create a user class:

rails g model user email:string password_digest:string
rake db:create db:migrate

I expect that the email is required for a user to be valid.

# spec/models/user_spec.rb
require 'rails helper'
describe User do
  let(:user) { User.new(email: "[email protected]", password_digest: "1234")}

  describe ".validates" do
    it "is valid with valid attrs" do
      expect(user.valid?).to eq true
    end

    it "requires an email" do
      user.email = nil
      expect(user.valid?).to eq false
    end

    it "requires email to have an @" do
      user.email = "booatboo.com"
      expect(user.valid?).to eq false
    end

  end
end

After that I have the validations in place for the user:

# app/models/user.rb
class User < ActiveRecord::Base
  validates :email, presence: true, format: {with: /@/}
end

Controllers

Create a user controller

rails g controller users

I expect the sign up form to be rendered:

# spec/controllers/users_controller_spec.rb
require "rails_helper"

describe UsersController do
  describe "GET 'new'" do
    it "is successful" do
      get :new
      expect(response.status).to eq 200
    end

    it "assigns a User object for the form" do
      get :new
      expect(assigns(:user)).to be_a User
    end
  end
end

Add logic for a user to see the sign up form

class UsersController < ApplicationController

  def new
    @user = User.new
  end

end

Add tests for the create method:

describe 'POST "create"' do
  let(:request) { post :create, user: {email: "[email protected]"} }
  it 'redirects to the home page' do
    request
    expect(response).to redirect_to root_path
  end

  it 'signs the user in' do
    request
    expect(session[:user_id]).to eq assigns(:user).id
  end

  context 'when invalid attributes given' do
    it 'renders the new template' do
      post :create, user: {email: nil}
      expect(response).to render_template :new
    end
  end
end