Capybara::Presenter

Transform your Capybara system tests into a presentations with automatic delays and browser notifications. Perfect for creating test recordings and demos.

I had this in a project and it helps me give quick updates about the progress of a feature. I like to communicate often, the easier, the better. Decided to extract it to a gem with some help from Claude. I hope it's useful for you as well. :)

Installation

Add this line to your application's Gemfile:

gem 'capybara-presenter', group: :test

Then run:

bundle install

Usage

Complete Setup

1. Include the module in your test class:

require 'capybara/presenter'

class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
  include Capybara::Presenter

  # Disable parallel testing in presenter mode for sequential execution
  parallelize(workers: 1) if ENV["PRESENTER_MODE"] == "true"

  # Configure browser driver for presenter mode
  if ENV["PRESENTER_MODE"] == "true"
    driven_by :selenium, using: :chrome, screen_size: [1920, 1080]
  else
    driven_by :selenium, using: :headless_chrome
  end

  # Add test start notifications and automatic delays
  setup do
    if presenter_mode?
      presenter_test_start_notification(self.class, @NAME)
      setup_presenter_delays
    end
  end
end

2. For Minitest users, also add to your individual test classes:

class UsersSystemTest < ApplicationSystemTestCase
  # Test methods automatically get start notifications
end

3. For RSpec users:

RSpec.configure do |config|
  config.include Capybara::Presenter, type: :system

  config.before(:each, type: :system) do
    if presenter_mode?
      presenter_test_start_notification(self.class, example.description)
      setup_presenter_delays
    end
  end
end

Running Tests in Presenter Mode

# Enable presenter mode
PRESENTER_MODE=true bundle exec rails test:system

# Customize timing
PRESENTER_MODE=true PRESENTER_DELAY=1.5 bundle exec rails test:system

# Disable notifications
PRESENTER_MODE=true PRESENTER_NOTIFICATIONS=false bundle exec rails test:system

In Your Tests

test "user registration" do
  visit new_user_registration_path

  fill_in "Email", with: "user@example.com"
  fill_in "Password", with: "password123"
  presenter_milestone("Form Complete", "All fields filled")

  click_button "Sign up"
  presenter_milestone("Success", "User registered successfully")

  assert_text "Welcome!"
end

API

• presenter_mode? - Check if presenter mode is enabled
• presenter_delay(seconds) - Add custom delay
• presenter_notification(title, message) - Show browser notification
• presenter_milestone(title, message) - Show milestone notification

Configuration

Capybara::Presenter.configure do |config|
  config.enabled = ENV['PRESENTER_MODE'] == 'true'
  config.delay = 2.0
  config.notifications = true
  config.notification_position = :center  # :top, :center, :bottom
end

Environment Variables

• PRESENTER_MODE=true - Enable presenter mode
• PRESENTER_DELAY=2.0 - Action delay in seconds
• PRESENTER_TEST_START_DELAY=2.0 - Delay before each test
• PRESENTER_NOTIFICATIONS=false - Disable notifications

Browser Setup

For notifications to appear, use a non-headless driver:

if ENV["PRESENTER_MODE"] == "true"
  driven_by :selenium, using: :chrome
else
  driven_by :selenium, using: :headless_chrome
end

Examples

# See the gem in action
rake presenter:run

# View all options
rake presenter:help

License

The gem is available as open source under the terms of the MIT License.