Sample Capybara Driver Running Headless Chrome in a Container

README.md

Sample Capybara Driver Running Headless Chrome in a Container

To run this script

docker-compose build
docker-compose up -d chrome
docker-compose run --rm my-integ-tests
docker-compose down

docker-compose.yml

version: '3.9'
services:
  my-integ-tests:
    container_name: my-integ-tests
    image: test/my-integ-tests
    build:
      context: .
      dockerfile: Dockerfile
    environment:
      CHROME_URL: http://chrome:4444/wd/hub
    stdin_open: true
    tty: true
    depends_on:
    - chrome
  chrome:
    container_name: chrome
    image: selenium/standalone-chrome
    environment:
      JAVA_OPTS: -Dwebdriver.chrome.whitelistedIps= -Dwebdriver.chrome.allowedIps=
    shm_size: '2gb'

Dockerfile

#FROM ruby:2.7
FROM ruby:3

RUN apt-get update -y && \
    apt-get -y upgrade && \
    apt-get install -y libarchive-tools zip

RUN gem install bundler

COPY Gemfile Gemfile

RUN bundle install

COPY . .

CMD ["bundle", "exec", "rspec", "/spec/test"]

Gemfile

source "https://rubygems.org"
gem 'rspec'
gem 'capybara'
gem 'capybara-webmock'
gem 'colorize'
gem 'webdrivers'
#gem 'chromedriver-helper'
gem 'selenium-webdriver'
gem 'byebug'
gem 'nokogiri'

spec__spec_helper.rb

# save this as spec/spec_helper.rb
require 'colorize'
require 'capybara/dsl'
require 'capybara/rspec'
require 'nokogiri'

RSpec.configure do |config|
  config.color = true
  config.tty = true
  config.formatter = :documentation
  config.include Capybara::DSL
end

def create_web_session
  Capybara.app_host = "https://www.google.com"
  Capybara.run_server = false # don't start Rack

  if ENV['CHROME_URL']
    Capybara.register_driver :remote do |app|
      Capybara::Selenium::Driver.new(app, browser: :remote, options: Selenium::WebDriver::Options.chrome, url: ENV['CHROME_URL'])
    end
    @session = Capybara::Session.new(:remote)
  else
    @session = Capybara::Session.new(:selenium_chrome)
  end
end

def end_web_session(session)
  session.reset!
  session.driver.quit
end

spec__test__demo_spec.rb

# Save this as spec/test/demo_spec.rb
require 'spec_helper.rb'
require 'webdrivers/chromedriver'
require 'cgi'

sleep 1

RSpec.describe 'simple tests', type: :feature do

  before(:each) do
    @session = create_web_session
  end

  after(:each) do
    end_web_session(@session)
  end

  it 'Load home page' do
    @session.visit '/'
  end
  
end