Resources

Capybara Gem - https://github.com/teamcapybara/capybara
Capybara Documentation - http://www.rubydoc.info/github/teamcapybara/capybara
Source - https://github.com/driftingruby/102-feature-testing-with-capybara

Summary

Gemfilegroup :test do
  gem 'simplecov', require: false
  gem 'capybara'
  gem 'selenium-webdriver'
end

rails_helper.rbrequire 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../../config/environment', __FILE__)
abort("The Rails environment is running in production mode!") if Rails.env.production?
require 'rspec/rails'
require 'capybara/rspec'
ActiveRecord::Migration.maintain_test_schema!

RSpec.configure do |config|
  config.fixture_path = "#{::Rails.root}/spec/fixtures"
  config.use_transactional_fixtures = true
  config.infer_spec_type_from_file_location!
  config.filter_rails_from_backtrace!
end

# brew install geckodriver
# brew services start geckodriver
# Capybara.default_driver = :selenium

# brew install chromedriver
# brew services start chromedriver
# Capybara.default_driver = :selenium_chrome
Capybara.default_driver = :selenium_chrome_headless

users_spec.rbrequire 'rails_helper'

RSpec.feature "User Features", type: :feature do
  context 'create new user' do 
    before(:each) do
      visit '/users/new'
      within("form") do
        fill_in 'First name', with: 'john'
        fill_in 'Last name', with: 'doe'
      end
    end

    scenario "should be successful" do
      within("form") do
        fill_in 'Email', with: '[email protected]'
      end
      click_button 'Create User'
      expect(page).to have_content 'User was successfully created.'
    end

    scenario "should fail" do
      click_button 'Create User'
      expect(page).to have_content 'Email can\'t be blank'
    end
  end

  context 'update user' do 
    scenario "should be successful" do
      user = User.create(first_name: 'John', last_name: 'Doe', email: '[email protected]')
      visit edit_user_path(user)
      within("form") do
        fill_in 'First name', with: 'Jane'
        fill_in 'Email', with: '[email protected]'
      end
      click_button 'Update User'
      expect(page).to have_content 'User was successfully updated.'
      expect(page).to have_content '[email protected]'
    end

    scenario "should fail" do
      user = User.create(first_name: 'John', last_name: 'Doe', email: '[email protected]')
      visit edit_user_path(user)
      within("form") do
        fill_in 'First name', with: ''
      end
      click_button 'Update User'
      expect(page).to have_content 'First name can\'t be blank'
    end
  end


  context 'destroy user' do 
    scenario "should be successful" do
      user = User.create(first_name: 'John', last_name: 'Doe', email: '[email protected]')
      visit users_path
      # expect { click_link 'Destroy' }.to change(User, :count).by(-1)
      accept_confirm do
        click_link 'Destroy'
      end
      expect(page).to have_content 'User was successfully destroyed.'
    end
  end
end