capybara-skill
Generates Capybara E2E tests in Ruby with RSpec integration. Acceptance testing DSL for web apps. Use when user mentions "Capybara", "visit", "fillin", "clickbutton", "Ruby E2E". Triggers on: "Capybara", "Ruby acceptance test", "fillin", "clickbutton", "havecontent".
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/lambdatest/agent-skills --skill capybara-skill- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads capybara-skill automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Capybara Automation Skill
Core Patterns
Basic Test (RSpec)
require 'capybara/rspec'
RSpec.describe 'Login', type: :feature do
it 'logs in with valid credentials' do
visit '/login'
fill_in 'Email', with: 'user@test.com'
fill_in 'Password', with: 'password123'
click_button 'Login'
expect(page).to have_content('Dashboard')
expect(page).to have_current_path('/dashboard')
end
it 'shows error for invalid credentials' do
visit '/login'
fill_in 'Email', with: 'wrong@test.com'
fill_in 'Password', with: 'wrong'
click_button 'Login'
expect(page).to have_content('Invalid credentials')
end
end
DSL
# Navigation
visit '/path'
go_back
go_forward
# Interacting
fill_in 'Label or Name', with: 'text'
choose 'Radio Label'
check 'Checkbox Label'
uncheck 'Checkbox Label'
select 'Option', from: 'Select Label'
attach_file 'Upload', '/path/to/file'
click_button 'Submit'
click_link 'More Info'
click_on 'Button or Link'
# Finding
find('#id')
find('.class')
find('[data-testid="x"]')
find(:xpath, '//div')
all('.items').count
# Matchers
expect(page).to have_content('text')
expect(page).to have_selector('#element')
expect(page).to have_css('.class')
expect(page).to have_button('Submit')
expect(page).to have_field('Email')
expect(page).to have_link('Click Here')
expect(page).to have_current_path('/expected')
expect(page).to have_no_content('error')
Within Scope
within('#login-form') do
fill_in 'Email', with: 'user@test.com'
click_button 'Login'
end
within_table('users') do
expect(page).to have_content('Alice')
end
TestMu AI Cloud
Capybara.register_driver :lambdatest do |app|
caps = Selenium::WebDriver::Remote::Capabilities.new(
browserName: 'chrome',
'LT:Options' => {
user: ENV['LT_USERNAME'], accessKey: ENV['LT_ACCESS_KEY'],
build: 'Capybara Build', name: 'Login Test',
platform: 'Windows 11', video: true
}
)
Capybara::Selenium::Driver.new(app,
browser: :remote,
url: 'https://hub.lambdatest.com/wd/hub',
capabilities: caps)
end
Capybara.default_driver = :lambdatest
Setup: gem 'capybara' + gem 'selenium-webdriver' in Gemfile
Run: bundle exec rspec spec/features/
Cloud (TestMu AI)
For remote browser execution, see reference/cloud-integration.md and shared/testmu-cloud-reference.md.
Deep Patterns
See reference/playbook.md for production-grade patterns:
| Section | What You Get |
|---|---|
| §1 Project Setup | Gemfile, Capybara config, driver registration, LambdaTest |
| §2 Feature Specs | Login flows, JavaScript interactions, modals, async content |
| §3 Page Objects | SitePrism pages with elements/sections, usage in specs |
| §4 API Testing | Request specs with auth headers, JSON assertions |
| §5 Database Cleaning | DatabaseCleaner transaction/truncation strategies |
| §6 Matchers & Helpers | Custom helpers, sign_in, expect_flash |
| §7 CI/CD Integration | GitHub Actions with Postgres, Redis, Chrome |
| §8 Debugging Table | 12 common problems with causes and fixes |
| §9 Best Practices | 14-item Capybara testing checklist |
FAQ
What does the capybara-skill skill do?
Generates Capybara E2E tests in Ruby with RSpec integration. Acceptance testing DSL for web apps. Use when user mentions "Capybara", "visit", "fillin", "clickbutton", "Ruby E2E". Triggers on: "Capybara", "Ruby acceptance test", "fillin", "clickbutton", "havecontent".
How do I install capybara-skill?
Run npx skills add https://github.com/lambdatest/agent-skills --skill capybara-skill in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/capybara-skill/ (personal) or .claude/skills/capybara-skill/ (project).
Which AI agents can use capybara-skill?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is capybara-skill safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains capybara-skill?
It is published by lambdatest in lambdatest/agent-skills. It has 200 recorded installs.
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